Detailed explanations in West Bengal Board Class 7 History Book Solutions Chapter 3 Some Aspects of Indian Society, Economy and Culture: A.D. 7th Century to 12th Century offer valuable context and analysis.

WBBSE Class 7 History Chapter 3 Question Answer – Some Aspects of Indian Society, Economy and Culture: A.D. 7th Century to 12th Century

1. Find out the odd one and underline it : (Full mark-1).

a. Nadu, Chola, Ur, Nagaram.
Answer: Chola.

b. Odantapuri, Vikramshila, Nalanda, Jagaddal, Lakhnauti.
Answer: Lakhnauti.

c. Joydeb, Dhiman, Beetpal, Sandhyakar Nandin, Charapami Dutta.
Answer: Joydeb

d. Luipada, Ashvaghosh, Sarahapa, Kanhapad.
Answer: Ashvaghosh.

2. Which one of the following statements do you think most matching with the given explanation? (Full mark-1).

a. Statement: The economy of Bengal during the Pala Sena period became agro dependent.
Exp-1 : The soil of Bengalin the Pala-Sena era became more fertile than before.
Exp-2 : On the western side of India, the maritime dominance of the Arab traders increased in the Pala-Sena era.
Exp-3 : The kings of the Pala-Sena period collected taxes from the farmers on their produce.
Answer:
Exp-2 : Oh the western side of India, the maritime dominance of the Arab traders increased in the Pala-Sena era.

b. Statement: In South India, human habitation grew up around the temple.
Exp-1 : The kings and the nobles donated rent-free lands to the temples.
Exp-2 : The system of irrigation was improved by digging canals from the rivers.
Exp-3 : The south Indian kings built many temples.
Answer:
Exp-1 : The kings and the nobles donated rent-free lands to the temples.

c. Statement: Spread of Buddhism declined during the Sena age.
Exp-1 : Sena kings were Buddhists.
Exp-2 : Sena kings attached nuch importance of Brahmanism.
Exp-3 : The number of the Sudras increased.
Answer:
Exp-2 : Sena kings attached much importance to Brahmanism.

3. Answer in brief (30 to 50 words): (Full marks -3).

a. Why did the trade and commerce flourish in South India between the ninth and eleventh century AD?
Answer:
A growth in mercantile activities was noted in South India between the 9th and centuries. Various inscriptions inform us about the trade bodies like co-operative socities and the commodities of trade which were catered by the traders. The trade Guilds awarded land to the temples.

The copper plate inscriptions from South India record this. Due to the growing over mercantile activities of the Cholas in South east Asia, India’s influence on the trade and comment in this region gradually increased.

b. Which crops were produced in Bengal during the Pala-Sena age? Which of these are still cultivated?
Answer:
Paddy, mustard and fruits like mango, jackfruit, pomegranate, banana, date and coconut comprised the main agricultural products of the age. Today cereal is an important item of the Bengali menu. However it is not mentioned in the food items of those times. Cotton, Betal-leaf, betel nut, Cardamom and mahua were produced in huge quantity.

Bamboo forests and many forms of trees around the villages were mentioned in the contemporary writings. Their woods were an asset and the vegetables were brinjal, gourd, pumpkin, cucurbita esculent root made their presence in the food of the Bengalies since ancient times. All the above mentioned crops are still cultivated.

c. Describe about the literary activities of the court of Lakshmana Sena.
Answer:
In the Sena era, poet Joydev was the famous poet in the court of Lakshmana Sena. The theme of his famous poetry Geet Govindam was the story of romantic love of Radha and Krishna. Another poet Dhoyee, on the court of Lakshman Sena, wrote the Pabanduta Poetry.

Three more poets of this era was Gobardhan, Umapati Dhar and Sharan. these five poets were ‘five gems’ of the court of Lakshman Sena. The book, Sadukti Karnamrits was a compilation of poems of several books.

d. Why did the Sena rule last lesser a period them that of the Pala rule?
Answer:
The Sena rule did not witness much publicity and popularity as it was in the Pala period. They attached much importance to the Brahmin religion. The Pala rule could strike their roots during their rule of400 years. But the Senas could not do so in their hundred years rule.

When Gopal became the king, he was backed by the support of the people. But Vijay Sena, the founder Of the Sena dynesty had no popular suport behind him. Pala rulers could make themselves acceptable to the people. The Senas failed to do it. In the field of learning, religion and the artistic activities, the Pala era was far above the Senas.

4. Write in details (100 to 120 words):

a. If you want to draw a picture of the feudal system, why does it look like a triangle? How did the feudal lords spend their livlihood in this system?
Answer :
The triangle is wide at the base. This means, the people at the bottom are more in number. Above them are feudal or middle level leaders. Above them are a few principal leaders. The king is above the rest. The division of authority and revenue in this manner forms a system known as feudalism.

The feudal groups had a common characteristic. They did not work to earn their living. They lived on other people’s income. There were divisions in these groups. Some headed a village. Some others controlled a group of villages. Yet some others controlled a whole region. In this manner, the society was divided into different classes, comprising the king, the group leaders and the people at large.

The principal feudal lords and the other lords always faught among themselves. Each tried to expand his authority. Often they joined hands to wage a war against the king. Apart from collecting revenues, they controlled the civil and legal administration of the annexed villages. Often they also revolted against the king. The weakness of the king’s authority becomes evident from this. Because of these feudal lords, the self-government of the villages was destroyed.

b. Compare and contrast the agricultural and commercial progress of the Pala-Sena period.
Answer:
The basic resources of the economic condition of Bengal in the Pala-Sena period were agriculture, industry and trade. The importance of trade started reducing during this age. The mercantile activities of the Arab traders along the Arabian Sea coast in Western India led the Bengal traders to step back.

Due to the decay in foreign trade, the economy of Bengal became dependent on agriculture. The fall of trade was related to the devaluation of currency. The use of gold and silver coins started waring during the rule of the Palas and Senas in Bengal.

‘Cowrie’ become the main medium of trade. In this agarian Society, there are many instance of land grant. The kings granted land to religious institutions. The kings collected one-sixth of the produce from the farmers as revenue. Cotton was the principal commodity of trade. The fine cotton clothes of Bengal became famous all over the world. Handicrafts included wooden and metalic utensils and ornaments were useful.

c. Write a note about the art and architecture of Bengal in the Pala period.
Answer:
The art form of the Pala era is called Eastern Indian style of art. The Gupta art was the Predecessors of the Pala style. Of the Pala architecture the stupas, the Bihars and the temples deserve special mention. Due to human anger and the curse of nature the sculptures were totally destroyed.

The stupas built in the reign of the Pala kings looked like the mountain peaks. In West-Bengal and Bangladesh these stupas were found in numbers. But the original thinking was lacking in the construction of the stupas. These Bihars were the abodes of the Buddhists and the centres of Buddhist learning. Sompuri Bihar of Paharpur was the famous one of the Pala stupas.

The temple in the middle of Sompur Bihar was really remarkable among temples. These temples were square in size. There were underground compartments, a path going around the temple. Mamiupa’. were very high pillars. In construction of the temples, local burnt bricks and mud were used.

The famous specimens of the Pala arts were its sculptures. The Paharpur field of excavation was the best of them, where a large number of specimens are available. These were the examples of folk art. Happiness and miseries of daily lives, social life and religions belief have been depicted. The pictures drawn before the eleventh and twelfth centuries are not available at present.

The pictures which have been found now’ were only used as illustrations of the Buddhist manuscripts. In the Pala era, Bitpal and his son Dhiman were famous artists during the eighth and ninth centuries. They showed their skill in the metallic art, sculpture and painting.

d. Write a note about the society and religion of the Pala-Sena era,
Answer:
The life of the general people in the society was mostly afluent. But the economic condition of the people without land property and the labourers was not at all good. The literature of that time proves the same. The Sena rule did not witness much publicity and popularity as it was in the Pala period. They attached much importance to the Brahmin religion. Though the Buddhism existed, the Buddhists were not benifitted much by the government as it was before. The Brahmins only were the sole benificiaires as the head of the society.

There were several sub-divisions among the Brahmins. Brahmins were treated as a mixed caste of the sudras. The Brahmins could perform the duties of the ton-Brahmins, but the non Brahmins could not perform duties of the Brahmins. Beside the tribal people were there in the same period. Pala rulers could make themselves acceptable to the people. The Senas failed to do it.

Class 7 History Chapter 3 Question Answer West Bengal Board – Some Aspects of Indian Society, Economy and Culture: A.D. 7th Century to 12th Century

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
The tribal leaders who were skilled in warfare controlled the …………….
i. king
ii. samanta
iii. officials of the princely court
iv. certain regions
Answer:
iv. certain regions

Question 2.
The structure of the feudal society looked like a ……………
i. square
ii. triangle
iii. circle
Answer:
ii. triangle

Question 3.
The prime period of feudalism in Europe was A.D. ……………
i. 12th century
ii. 11th century
iii. 13th century
iv. 14th century
Answer:
i. 12th century

Question 4.
During the Chola administration ‘Nagaram’ was set up to redress the problems of …………
i. farmers
ii. priests
iii. traders
iv. Brahmins
Answer:
iii. traders

Question 5.
…………… became the main medium of exchange.
i. gold coin
ii. silver coin
iii. copper coin
iv. Cowrie
Answer:
iv. Cowrie

Question 6.
In the Paul-Sena era the subjects had to pay tax to the king for their ……………
i. village
ii. security
iii. temple
iv. playground
Answer:
ii. security

Question 7.
…………… came from Bengal.
i. wild buffalo and deer
ii. pig and deer
iii. horse and camel
iv. camel and monkey
Answer:
iii. horse and camel

Question 8.
Ramcharita of Sandhyekar Nandi was written in ……………
i. Bengali
ii. Hindi
iii. Pali
iv. Sanskrit
Answer:
iv. Sanskrit

Question 9.
Charyapada was composed in ancient ……………
i. Bengali
ii. Urdu
iii. Hindi
iv. Sanskrit
Answer:
i. Bengali

Question 10.
The fame of Nalanda University continued till the ……………
i. 12th century
ii. 14th century
iii. 11th century
iv. 13th century
Answer:
iv. 13th century

Question 11.
At present Buddhist stupas can be seen in Ashrafpur village of ……………
i. West Bengal
ii. Dacca district
iii. Rajsahi district
iv. Shittagong
Answer:
ii. Dacca district

Question 12.
Geet Govinda was written by ……………
i. Dhoyee
ii. Sharana
iii. Joydev
iv. Pabanduta
Answer:
iii. Joydev

Question 13.
Halayudh was a ……………
i. texicographer
ii. soldier
iii. traveller
iv. Minister
Answer:
iv. minister

Question 14.
In ancient Bengal main source of occupation was ……………
i. agriculture
ii. business
iii. animal husbandary
iv. fishing
Answer:
i. agriculture

Question 15.
Dipankar Srijnan was the acharya of ……………
i. Vikramshila
ii. Odantapur
iii. Sompuri
iv. Vikramshila, Odantopur, Sompuri
Answer:
iv. Vikramshila, Odantopur, Sompuri

Fill in the blanks : (1 mark for each question)

1. Atish was born in ______ village of Bikrampur.
Answer:
Bajroyogini.

2. With the introduction of Islamic Culture Indian ______ gained much.
Answer:
scholarship

3. Pala rulers could make themselves ______ to the people.
Answer:
acceptable.

4. Literature is the mirror of ______
Answer:
society.

5. Five poets in the court of Lakshmansena were called ______
Answer:
five gems.

6. In the poem of ______ was the tale of romance of Radha and Krishna.
Answer:
Geet Govinda.

7. Dhiman and his son ______ were renowned artists of the Varendra region.
Answer:
Bitpala.

8. The finest example of art in the Pala reign was ______
Answer:
sculpture.

9. Dharmapala founded the Vikramshil university on the banks of the river Ganges near ______
Answer:
Bhagalpur.

10. Hiuen Tsang studied in the ______ university.
Answer:
Nalanda.

11. ______ is a collection of poems and lyrics composed by the Buddhist Siddhacharyas
Answer:
Charyapada.

12. During the reign of the Pala rulerMahipala, the poet Sandhyakar Nandi wrote the ______
Answer:
Ramacharita.

13. ______ was a medical scientist of the Pala age.
Answer:
Chakrapani Dutta.

14. Bengalis learnt to eat potatoes from the ______
Answer:
Portuguese.

15. The bronze handicraft of the Cholas were very ______
Answer:
famous.

16. The growing importance of the regional monarchs had an impact on contemporary Indian society and ______
Answer:
economy.

State whether True or False: (1 mark for each question).

1. The Samantas and Mahasamantas had constant conflict with each other.
Answer:
true

2. The prime period of feudalism in Europe was A.D. 12th century.
Answer:
true

3. The copper handicraft of the Cholas was very famous.
Answer:
false

4. Because of the fedual lords the self-governance of the villages was lost.
Answer:
true

5. During Pala-Sena age, the ultimate authority over land raised with the farmers.
Answer:
false

6. The traders paid tax to the king for trade and commerce.
Answer:
true

7. The fine cotton clothes of Bengal acquired fame far and wide.
Answer:
true

8. Books of medicine of Chakrapanidutta were written in Bengali.
Answer:
false

9. The kings of the pala dynasty were brahmins.
Answer:
false

10. Harapresad Shastri recovered the manuscripts of the Charyaoada from Nepal.
Answer:
true

11. Students of Nalanda University were provided food free of cost, dress, bedding.
Answer:
true

12. The stupas built during the Pala Age looked like Shikharas.
Answer:
true

Match the column A with column B

Column – A	Column -B
a. Dhiinan and Bitpal were b. Saduktikarnamrita c. Geet Govinda was the tale of d. Halayudh wrote e. Charyapada was composed in f. During Pala rule the king granted lands g. Sandliyakar Nandi w rote h. Turkish invaders i. Dharmapala founded the	i. Brahinanasarvasya ii. ransacked the Nalanda University iii. renowned artists iv. were collection of poems v. Ramacharita vi. romance of Radha and Krishna vii. Vikramshil University viii. to religious institutions ix. ancient Bengali language

Answer:
a. Dhiman and Bitpal were renowned artists.
b. Saduktikarnamrita were collection of poems.
c. Geet Govinda was the tale of romance of Radha and Krishna.
d. Halayudh wrote Brahmanasarvasya.
e. Charyapada was composed in ancient Bengali language.
f. During Pala rule the king granted lands to religious institutions.
g. Sandhyakar Nandi wrote Ramacharita.
h. Turkish invaders ransacked the Nalanda University.
i. Dharmapala founded the Vikramshil University.

Answer in brief (within 30 – 50 words) : (Full mark-3)

Question 1.
Why was there a conflict between Samantas and Mahasamantas?
Answer:
Both Samanta and Mahasamanta or feudal lords tried to increase their influence. For this they had constant conflict with each other. Sometimes they even unified to fight against the king.

Question 2.
What was the structure of feudal society in Europe?
Answer:
The structure of the feudal society in Europe looked like a triangle. The king, feudal overlords (barons. and vassals were placed at various levels of society. The knights wore armor and fought under the feudal overlords. Serfs toiled in the manner houses of the feudal lords.

Question 3.
Who were knights?
Answer:
In the middle age there were three types of soldier Foot soldiers, archers, and knights. The knights were heavily armored soldiers who rode on horseback. Only the wealthiest nobles could afford to be a knight.

Question 4.
What was the feudal period in Europe?
Answer:
Feudalism was a combination of legal, economic, military and cultural customs that flourished in medieval Europe between the ninth and fifteenth centuries. Broadly defined it was a way of structuring society around relationships that were derived from the holding of land in exchange for service or labour.

Question 5.
What was the role of temples in south India?
Answer:
South Indian monarchs built many temples. Common people arid artisans settled around the temples. Priests, cooks, singers, dancers etc. used to stay in the temple complex. The temple authorities were granted tax free land by the king, merchants and aristocrats.

Question 6.
Write a short note on the irrigation system at the time of Cholas.
Answer:
Irrigation was developed in Tamil Nadu by creating canals from river Kaveri and its tributaries. So, agricultural production was increased, in some areas cultivation could be done twice a year. In areas which had little scope for irrigation, lakes and tanks were dug up to retain rain water. Wells were found in some areas.

Question 7.
What was the significant development in trade and commerce in South India between 9th and 11th century?
Answer:
The Chetty or traders used to travel with loads of commodities. There were various trade guilds or cooperative societies. Due to the growing dominance of Cholas in South East Asia. Indian trader’s influence on trade and commerce in those countries gradually increased.

Question 8.
How many taxes were collected by the Soun Indian kings?
Answer:
The king used to levy a share from the produce of the farmers, herdsmen and artisans. Apart from land revenue, taxes were charged from the traders. Moreover/during war, the triumphant soldiers used to plunder and rampage the vanquished region. Important families of the region were given the responsibility of collecting the taxes.

Question 9.
Why did the economy of Bengal depend on agriculture during Pala Sena age?
Answer:
The monopoly of the Arab along the Arabian Sea coast in Western India had forced the Bengal traders to retreat. Importance of bengal traders in foreign trade and commerce had waned. So the economy of Bengal became dependent on agriculture.

Question 10.
Mention the different taxes which Pala-Sena kings collected from their subjects.
Answer:
The king collected one-sixth of the produce from the farmers. The king also accepted fruits, flowers and woods as revenue. The traders also paid tax to the king for trade and commerce. The subjects paid tax to the king for their security. The cillagers had to pay taxe for the entire village.

Question 11.
What were the agricultural products in Pala-Sena age?
Answer:
Paddy, mustard and various types of fruits like mango, jackfruit, banana, pomegranate, date and sosonut comprised the main agricultural products. Cotton, betel leaf, betel nut, cardamom and mahua were also produced in large quantity.

Question 12.
What kind of animals were found in Bengal during Pala-Sena age?
Answer:
Crow, bull, goat, duck, hen, pigeon, crow, cuckoo, different aquati birds, horse, camel, elephant, tiger, wild buffalo, monkey, deer, pig, snake etc. were found in large numbers. Of these the horse and camel came from outside Bengal.

Question 13.
Why was Sanskrit so important then?
Answer:
Sanskrit was the language of the elite and the scholars. Books on literature, grammar, religion, philosophy and medicine were usually written in Sanskrit. For example, the poem of Sandhyakar Nandi or books of medicine of Chakrapanidutta were written in Sanskrit.

Question 14.
Write a short note on Ramcharita.
Answer:
Ramcharita was written by the poet Sandhyakar Nandi. The poem was written following the legends of the Ramanayana. Here the poet has used allegorty. He narrated about Rama of Ramayana and also about the Pala king Rampala.

Question 15.
What is Charyapada?
Answer:
Buddhist Siddhacharyas composed Charyapada during the A.D. 8th and 12th centuries. It was composed in ancient Bengali language. Acharya Haraprasad Shastri recovered the manuscript of the Charyapada from Nepal.

Question 16.
What was the role of Buddhist monasteries in spread of learning?
Answer:
Seats of learning of the Buddhist philosophers were Buddhist monasteries. Monasteries of Nalanda, Odantaputi, Vikramshil, Somepuri, Jagaddal, Bikrampuri worth mentioning. The monastories played a significant role in education with the support of the Pala kings and the buddhist acharyas and students.

Question 17.
What is Oriental Art?
Answer:
The style of art in the Pala reign is known as Oriental Art. The forerunner of this style was the Gupta art. The main architectural monuments of the Pala age were stupa, vihara and temple, now most of them do not exist.

Question 18.
What was the finest example of art in Pala reign?
Answer:
The finest example of art in Pala reign was sculpture. In the archeological site of paharpur we find some of the best specimens. The influence of local style is evident in the stone tables on the walls of the main temple. In those tables the images of Radha-Krishna, Shive and Buddha, Avalokiteswar are found.

Question 19.
What was the condition of Buddhism during Pala period?
Answer:
Under the Sanas, Buddhism was neither spread nor propagated as in Pala period. The Buddhists were no longer benefited as before. Brahmabnical Hinduism was predominant. The Brahmins being the head of the society were the sole beneficiaries.

Question 20.
Who were the ‘five gems’ in the court of king Lakshmansena?
Answer:
Five poets in the court of Lakshmansena were called ‘five gems’. They were Joydev who composed Geet Govinda. It was the tale of romance of Radha and Krishna. Another poet Dhoyee who wrote Pabanduta. The other poets were Gobardhan, Umapati Dhar, and Sharana.

Question 21.
Briefly compare the Pala age with the Sena age.
Answer:
In the field of education, religion and art the Pala age was much superior to that of the Senas. The Pala had struck roots in the society of Bengal over 400 hundred years, the Senasfailed to do so in a little over 100 years. When Gopala became the king of bengal, he had a public support but Vijaysena had no such public support.

Question 22.
Who was Dipankar Srijnan?
Answer:
Dipankar Srijnan was the best and most famous Bengali buddhist preceptor. He was initiated by Acharya Silrakshit in the Odantapuri monastry. He was preceptor and acharya of Vikramsila, Odantapur and somepuri monasteries. At the request of the king of Tibet, he went to Tibet to spread Buddhism.

Answer in detail (within 100 – 120 words) (Full mark-5)

Question 1.
Write a note on Nalanda.
Answer:
During the time of Gupta Empire in the 5th centurya Buddhist vihara was set up at Naianda. With the passage of time the acamedic fame of Nalanda spread all over Asia. During the reign of King Harshavardhana and the Palas. Nalanda received royal patronage. Not only the landlords and the regional kings but also the rulers of Sumatra granted resources for the university.

From their handsome contributions students were provided food free of cost, dress, bedding and medicine. Students from far and wide like Tibet, China, Korea and Mongalia came to study here. A special fund was arranged to teach the students of China.

In 7th century Hitien Tsang studied in the this university. Students had to go through a challenging test before admission. During the heyday of the Nalanda University 10,000 Buddhist mendicants resided here. The fame the university continued till 13th century when the Turkish invaders attacked Bihar and ransacked the university.

Question 2.
Write a note on cultural exchange and conflict in India between A.D. 7th century to 12th century.
Answer:
There was much interesting cultural exchange and conflict in India between A.D. 7th century to 12th century. Many instances of Indian cultural traditions can be traced in South East Asia, Tibet and China. It is clear that the multicultural exchange has helped to develop a varied Indian lifestyle.

But that lifestyle was not fixed. It changed with the passage of time. Even today we find varities of life
style in different parts of India. With the introduction of Islamic culture, Indian scholarship gained much. The mingling of two cultures had an impact on society, culture and polity.

Gradually changes came in the use of language, dress, food, music, art and ministrative ideas. A mutual understanding took place. Both the cultures influenced each other.

Additional Questions and Answers :

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
Who ruled in Tamil Nadu ……………….
i. Chalukyas
ii. Rastrakutas
iii. Cholas
iv. None of these
Answer:
Cholas

Question 2.
Who received the land could collect the taxes ………………
i. vehicles
ii. betel leaves
iii. woven clothes
iv. all of these
Answer:
all of these

Question 3.
Nagabhata was ………………………
i. Chekreyudha
ii. Malava
iii. Pratihara king
iv. Gupta king
Answer:
iii. Pratihara king

Question 4.
In which language the prashasti found in Gwalior written ……………
i. Sanskrit
ii. Urdu
iii. Hindi
iv. Bengali
Answer:
i. Sanskrit

Question 5.
Prashastis tell us how rulers wanted to depict themselves as ………………….
i. achiver
ii. leader
iii. valient victorious warriors
iv. none of these
Answer:
iii. valient victorious warriors

Question 6.
What was the use of money collected from taxes ………………………..
i. construction of forts
ii. construction of temples
iii. to fight wars
iv. all of these
Answer:
iv. all of these

Question 7.
Vetti means ……………..
i. rant
ii. revenue
iii. tax
iv. all of these
Answer:
iii. tax

Question 8.
The literal meaning of hiranya garbha is ……………………….
i. golden deer
ii. golden womb
iii. Dantidurga
iv. none of these
Answer:
golden womb

Question 9.
Who were expected to bring gifts for kings in 17th century —
i. samantas
ii. maha samantas
iii. mandalesshvara
iv. landlords
Answer:
i. samantas

Question 10.
The other name of the great lord of a region was ……………………….
i. king
ii. samanta
iii. landlord
iv. maha-mandaleshvara
Answer:
iv. maha-mandaleshvara

Question 11.
The new dynasty developed in eastern part of the country ………………….
i. Cholas
ii. Rastrakutas
iii. Palas
iv. Senas
Answer:
iii. Palas

Short Questions and Answers 

Question 1.
What new dynasties emerged after the 7th century in the subcontinent?
Answer:
New dynasties emerged after 7th century –

• Gurjara-Pratiharas
• Rastrakutas
• Palas,
• Sholas
• Shauhan

Question 2.
Who were samantas?
Answer:
Samantas were big landlords in different regions of the subcontinent.

Question 3.
What happened when Samantas gained power and wealth?
Answer:
The Samantas declared themselves maha-samantas, maha-mandaleshvara. Sometimes they asserted their independence from their overlords.

Question 4.
How’ did the Rashtrakutas gained power and became independent?
Answer:
Rashtrakutas were subordinates to the Chalukvas. In the mid-eighth century Dantidurga, a Rashtrekuta leader, overthrew his Chalukya overlord and became independent.

Question 5.
From where did resources come to the states?
Answer:
Revources came from the producers like paesants, cattle-keepers, artisans and traders.

Question 6.
How were resources used in the period 7th to 12th century?
Answer:

• to finance king’s establishment
• to construct temples and forts
• to fight wars,
• to build trade routes.

Question 7.
Who collected revenue?
Answer:
Revenue collectors were generally recruited from influencial families. In many cases relatives of the king held these positions.

Question 8.
How were Brahmanas rewarded?
Answer:
Kings often rewarded Brahmanas with grants of land.

Question 9.
What were the rights of the people who received land grants during Chola rule?
Answer:
They could collect taxes in different forms, such as ……..

• judicial fine,
• on betel leaves, woven cloth, vehicles etc.
• plant trees and bushes
• get wells dug and cacals constructed
• stop water wastage and build embankments
• They could build buildings.

Question 10.
Write a note on Vikramsila.
Answer:
In the A.D. 8th century the Pala emperor Dharntapala founded the Vikramshil university or mahavihara near Bhagalpur in the northern part of Magadha. This university lasted for the next 500 years. Over 100 teachers were involved in the teaching and study of religion.

Students used to come there to study. Grammar, logic, philosophy were taught here. Maximum three thousand students could avail free education. Students had to appear for an admission test before enrolment. At the end of their course they were awarded with titles.

Vikramshila was the main centre for Vajrayana cult: Many valuable manuscripts were preserved in its library. Dipankar Srijnan (Atish. was one of the mahacharyas of this university. This university was also ransacked by the Turkish invaders in the 13th century.

Question 11.
Describe the main architectural monuments of the Pala age.
Answer:
The main architectural monuments of the Pala age were stupa, vihara and temple. Now most of them do not exist. In ancient India there was a custom of building Buddhist and Jain stupas. In fact, the Buddhists in particular, constructed many stupas. Initially these stupas were round shaped. But later, they were conical in shape.

The stupas built during the Pala Age looked like shikhams or mountain peaks. No originality is seen in the design of the stupas of Bengal. The viharas were the residences of the Buddhist monks and also seats of learning of Buddhist knowledge systems.

Sompuri vihara at Paharpur was a prominent vihara in the Pala reign. The temple of Sompuri vihara is also worth mentioning. The temple was square shaped. The temple had underground chambers or garvagriha, a path for going around the temple, an altar and lofty pillars. The temple was built with burnt brick and clay.

Question 12.
Write a short note on feudal system of India.
Answer:
The growing importance of the regional monarchs had an impact on contemporary Indian society and economy. A section of the society gained enormous power. The contemporary writers had addressed this group as ‘Samanta’, ‘Raja’, ‘Raimak’ etc. Some of them were high officials in the princely courts. Sometimes they were granted lands in lieu of salary.

The revenue from such lands was the income of this group. In some regions, the defeated kings also enjoyed the revenue of those areas. Often the tribal leaders who were skilled in warfare controlled certain regions.

These groups had one common feature. None of them gave labour for production. They lived on the revenue or output of others’ labour. Again, there were divisions in these groups. Some headed a village. Some controlled a group of villages. Others controlled an entire region. In this manner the society was stratified into different classes comprising the king, the group leaders and the common people.

The Samantas Mahasamantas (feudal lords. had constant conflict with each other. Sceryone wanted to increase his influence. Sometimes they even unified to fight against the king. Besides extracting revenues, these groups used to govern the village and even give judgment. Often they refused to recognize the authority of the king. The weakness of the sovereign becomes evident.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 9 Continent of Asia offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 9 Question Answer – Continent of Asia

Write the correct names : (Page no. 85)

Mountain ranges converging at the Pamir Knot and the Armenian knot

(Page no. 86)

Name of the Plateau	Belong to Countries
Arabian Plateau	Arab
Decan Plateau	India
Indo China Plateau	Mayanmar, Thailand

(Page no. 89)

Answer the following quistions with the help of the map :

Question 1.
In which direction does the Ob, Yenesi and Lena rivers are flowing ?
Answer:
The rivers are flowing from south to north.

Question 2.
Which one is the longest among the north flowing rivers ?
Answer:
Yenesi is the longest among the north flowing rivers.

Question 3.
Why are north flowing rivers flood prone?
Answer:
The north flowing rivers are in frizid zone. Therefore the mouths of the rivers remain always snow covered throughout the year. The mouth of the rivers remains chocked, since the rivers are flood prone.

Answer the following : (Page no. 90)

Question 1.
Which of the South flowing rivers of Asia originates near Manas Sarobar of Tibet and falls in Bay of bengal ?
Answer:
The river Bramhaputra of Asia being originated near Manas Sarobar and falls in Bay of Bengal. Indus also being originated from Manas Sarobar and falls in Bay of Bengal

Question 2.
Which is the longest south flowing river of Asia ? What is the length of the river ?
Answer:
The longest South flowing river of Asia is Mekong. Its lengts is 4,350 km

Can you say.

Question 1.
Which river of Asia is known as ‘The River of Golden Sands’?
Answer:
The river Yangtze-Kiang is known as ‘The River of Golden Sands’.

Question 2.
Name two east flowing rivers of Asia which empty into China sea.
Answer:
The two east flowing rivers of Asia which empty into China sea are Yangtse and SiKiang.

Question 3.
Which river of Asia is known as the ‘Yellow river’?
Answer:
The river Huang He is known as the Yellow river.

Question 4.
Which is the longest river of Asia?
Answer:
The Yangtze river is the longest river in Asia.

Tell me : (Page no. 97)

Question 1.
What are the causes behind the development of Kihin or Tokyo Yokohoma industrial region as one of the best and most significant industrial regions of the world?
Answer:

1. The ports of Kihin industrial region communicate with other ports of the world.
2. The ports are famous for import and export.
3. Yokohoma port acts as the external port.
4. The town planning is very good of the city.
5. The city has successfully controlled and prevent industrial pollution.
6. The agriculture has been pain equal importance with industry.
7. This city has been recognised as ecofriendly city by Japan government.
8. The waste treatment has been done here properly.
9. The barren lands are being restored. For this reason Kihin industrial centre is known as the best industrial centre.

Question 2.
What are the problems faced by an industrial region?
Answer:
The problems of industrial region :-

1. High density of population in industrial centre can creat problems.
2. The lack of development in transport system put a bar for industrial development.
3. Lack of lands.
4. Industrial development can cause environment pollution.
5. Lack of modern mechinery reduces the production.
6. Lack of sufficient capital.

Question 3.
How can the problems of an industrial region be solved ?
Answer:
To solve the problems of an industrial region :

1. Transport system must be developed.
2. It must be setablished in a vast area.
3. Guaranteed supply of capital is required.
4. Modern machinery must be used.
5. Environment pollution must be controlled.

Class 7 Geography Chapter 9 Question Answer West Bengal Board – Soil Pollution

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
The second largest city and largest port of Japan-
i) Yokohama
ii) Tokyo
iii) Kawasaki
iv) Chiba
Answer:
i) Yokohama

Question 2.
The largest industrial and trase centre of Japan-
i) Yokohama
ii) Tokyo
ii) Kawasaki
iv) Chiba
Answer:
ii) Tokyo

Question 3.
The population of South-West Asia is-
i) high
ii) medium
iii) very high
iv) low
Answer:
iv) low

Question 4.
Sanghai is known as-
i) Rice Bowl of China
ii) Granary of China
iii) Manchester of China
Answer:
iii) Manchester of China

Question 5.
The mouth of Indus river is-
i) Arabian Sea
ii) Bay of bengal
iii) South China Sea
iv) Persian gulf
Answer:
i) Arabian Sea

Question 6.
Decan Plateau belong to-
i) Arab
ii) Mayanmar
iii) Thailand
iv) India
Answer:
iv) India

Question 7.
Main feature of Siberian climate-
i) average summer temperature 30° C
ii) 7-8 months summer
iii) 7-8 months snowfall
Answer:
iii) 7-8 months snowfall

Question 8.
A mountain range extended from Pamir knot-
i) Jagros mountain
ii) Pontic mountain
iii) Elburge mountain
iv) Altintag mountain
Answer:
iv) Altintag mountain

Question 9.
A mountain range extended from Armenian knot-
i) Himalaya mountain
ii) Pontic mountain
iii) Altintag mountain
iv) Suleman mountain
Answer:
ii) Pontic mountain

Question 10.
The source of Mekong river-
i) Kunlun mountain
ii) Armenian pleateau
iii) Manas Sarobar
iv) Shan pleateau

Question 11.
In hot desert type extreme climate-
i) winter temperature 0°-10° C
ii) summer temperature 30° -35° C
iii) rainfall 150-200 cm
Answer:
ii) summer temperature 30°-35° C

Question 12.
In Tundra climatic region grow-
i) cedar
ii) birch
iii) larch
iv) lichen
Answer:
iv) lichen

Question 13.
Szechuan basin is called-
i) Rice bowl of China
ii) Granary of China
iii) Manchester of China
iv) Red basin
Answer:
iv) Red basin

Question 14.
A problem of Tokyo industrial region-
i) want of capital
ii) scacity of electricity
iii) scarcity of land
Answer:
iii) scarcity of land

Question 15.
Largest oil producing centre of the world-
i) Manifa
ii) Ghawar
iii) Gach Saran
iv) Suleman
Answer:
ii) Ghawar

Fill in the blanks : (1 mark for each question)

1. The capital of Japan is _________.
Answer:
Tokyo.

2. _________ percent of world people live in Asia.
Answer:
60.

3. The heighest part of the landmass is _________.
Answer:
Mount Everest.

4. The _________ sea seperates Asia from Europe.
Answer:
Red.

5. The continent of Asia and Europe and Asia is jointly called _________.
Answer:
Eurasia

6. The largest plain of Asia is _________
Answer:
the Northern plain

7. The joint flow of Tigris and Euphrates is called _________
Answer:
Sat-el-Arab.

8. The _________ vegetation grow in Equatorial region.
Answer:
evergreen

9. The Alpine forest of Russia is known as _________ forest.
Answer:
Taiga forest.

10. Yangtze-Kiang river originates from _________ mountain.
Answer:
Kuenlun

11. _________ is world’s largest off shore oilfield.
Answer:
Safaniya

12. Aaljara is a oilfield of _________.
Answer:
Kuwait

13. The largest external port of Japan is _________.
Answer:
Yokohama

14. Due to differences in relief, soil and climate the the Yangtze basin is divided into _________ parts.
Answer:
three

15. The climate of a place far away from the sea is _________.
Answer:
extreme

State whetherTrue or False : (1 mark for each question)

1. Hwang-Ho river valley was the basis of Chinese civilazation.
Answer:
true

2. In Asia number of countries are fifty.
Answer:
false

3. Hindukush mountain extends fromArmenian knot.
Answer:
false

4. A north flowing river of Asia is Tigris.
Answer:
false

5. The source of Ganga is Gangotri glacier.
Answer:
true

6. Amur is a east flowing river of Asia.
Answer:
true

7. Equatorial type of climate is observed in Indi
Answer:
false

8. The hottest place of Asia is Jacobabad.
Answer:
true

9. Middle Yangtze Basin is known as Granary of China.
Answer:
true

10. Over population is a problem of Tokyo Industrial Region.
Answer:
true

11. Masjid-i-Suleman is a famous oilfield of Iraq.
Answer:
false

12. Jebel Dukhan is a oilfield of Qatar.
Answer:
true

13. Taiga forest of Russia is the largest coniferous forest of the world.
Answer:
true

14. The mouth of Huang-Ho river is South China sea.
Answer:
false

15. The source of Mekong river is Shan Plateau.
Answer:
false

Match the following : (1 mark for each question)

a) Match the column A with column B.

A	B
1. Length of river Lena	a. Kunlun Mountain
2. Mouth of Euphrates	b. in India, Bangladesh, Vietnam
3. Source of Hwang-Ho is	c. petroleum
4. Monsoon type climate is found	d. 2900 km
5. Gharwar is a oilfield of	e. 4400 km
6. Modern civilisation is fueled by	f. Persian Gulf
7. Length of Brahmaputra	g. Tokyo, Delhi, Beijing, Singapore
8. Famous cities of Asia	h. Soudi Arabia

Answer:

1. Length of river Lena 4400 km
2. Mouth of Euphrates Persian Gulf.
3. Source of Hwang-Ho is Kunlun Mountain.
4. Monsoon type climate is found in India, Bangladesh, Vietnam.
5. Gharwar is a oilfield of Soudi Arabia.
6. Modern civilisation is fueled by petroleum.
7. Length of Brahmaputra 2900 km
8. Famous cities of Asia Tokyo, Delhi, Beijing, Singapore.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
Which is the Asia’s hottest place ?
Answer:
Jacobabad is hottest place in Pakistan in Asia.

Question 2.
Which is the Asia’s coldest place?
Answer:
The coldest place in Asia is Verkhoyansk in north-eastern part of Siberia, Russia.

Question 3.
Which place of Earth receives maximum rainfall ?
Answer:
Mausinram receives the maximum rainfall.

Question 4.
Which is the biggest lake of Asia ?
Answer:
Caspian sea is the biggest lake of Asia.

Question 5.
On which river valley, the chinese civilization developed?
Answer:
The chinese civilization developed on the valley of Hwang-Ho.

Question 6.
Where is the source of river Ganga ?
Ans:
Gangotri is the source of river Ganga.

Question 7.
Where is the mouth of river Brahmaputra?
Answer:
Bay of bengal is the mouth of river Brahmaputra.

Question 8.
On which river valley, the Mesopotamian and Sumerian civilization developed?
Answer:
The Mesopotamian and Sumerian civilization developed on the valley of Tigris and Euphrates.

Question 9.
Where does Tibetan plateau lie ?
Answer:
Tibetan plateau lies between the Himalaya and Kunlun mountains.

Question 10.
Name the plain plain of Asia which is largest plain of the world.
Answer:
The northern plain of Asia is the largest plain of the world.

Question 11.
Write a characteristic of north flowing rivers of Asia.
Answer:
The mouth of these rivers are located in the Frigid zone.

Question 12.
Write a characteristic of south flowing rivers of Asia.
Answer:
In the lower course of the rivers flood occurs in the rainy season.

Question 13.
Write a characteristic of east flowing rivers of Asia.
Answer:
River basins are densely populated.

Question 14.
On what condition natural vegetation is related?
Answer:
Natural vegetation is related to climate.

Question 15.
State the characteristics of monsoon winds.
Answer:
The charecterics of monsoon wind are wet summer and dry winter.

Question 16.
Which type of rainfall occurs in Equatorial region?
Answer:
Convectional rainfall occurs in Equatorial region.

Question 17.
What is called the “The Rice bowl of China”?
Answer:
The Hunan Province of China is called “The Rice bowl of China.”

Question 18.
What is called the “Manchester of China”?
Ans:
Sanghai of China is called the “Manchester of China.”

Question 19.
What is the largest city of China ?
Answer:
Sanghai is the largest city of China.

Question 20.
Which basin is called the ‘Red Basin’?
Answer:
Szechuan basin is called the ‘Red basin’.

Question 21.
What is the largest port of Japan?
Answer:
Yakohoma is the largest port of Japan.

Question 22.
What is the full form of OPEC ?
Answer:
The full form of OPEC is Organisation of Petrolium Exporting Countries.

Question 23.
What is the world’s largest offshore oilfield ?
Answer:
Safaniya is the world’s largest offshore oilfield.

Question 24.
What is the largest oil producing centre of the world?
Answer:
The largest oil producing centre of the world is Ghawar.

Short Questions & Answers : (2 marks for each question)

Question 1.
What is the significance of Pamir Knot?
Answer:
Pamir is the higest plateau of the world. The different mountain ranges have come from different direction and met with each other forming a Knot. So it is called Pamir Knot.

Question 2.
Why is the Pamir called the ‘Roof of the World’?
Answer:
Pamir plateau is situated in Tajakistan state which is to the North West of JammuKashmir of India. This is the highest plateau of the world. The altitude of Pamir is 4873 m This plateau is so high that it seems that the roof of the world. So it is called the roof of the world.

Question 3.
Write a short note on OPEC.
Answer:
OPEC: The full form of OPEC is Organisation of Petrolium Exporting Countries. The oil producing countries of South-West Asia are Soudi Arabia, Iraq, Iran, Kuwait, United Arab Emirates etc. These countries are the members of this organisation. This organisation has reduced the monopoly control of the oil purchased countries. At present the member-countries could be able to keep 60% of the income for themselves.

Question 4.
Describe the northern plain of Asia.
Answer:
Acording to the nature and structure this plain are devided into three part –
a) The lowland of Turan : The lowland of Turan is situated in the centre of caspian and Arabian Sea. This region is 8-10 m below the sea lebel in some places.
b) Siberian Plain : The lowland from Ural mountain to the West to Yenesi river valley is called Siberian Plain. it is formed by the deposition of the alluviun by the river Ob and Yenesi.
c) Shield Plateau : This plain stretches from Yenesi river valley to the coast of Bering straight. It is an old eroded region which is called Siberian Shield though it is a part of very old plateau, now it has become a plain.

Question 5.
What are the oil producing countries of South West Asia?
Answer:
Among the oil producing countries Soudia Arabia is the largest oil producing country of the Arabian peninsula. Besides, the other oil producing states are Iraq, Iran, Kuwait, Qatar, United Arab Emirates, Oman etc.

Question 6.
Describe the course of the river Yangtze-Kiang.
Answer:
The longest river of Asia is Yangtse (6,300 km). This river is originated from Geladangdong mountain peak in the south of Kuenlun mountain and flows towards eastward and emptied in the East China Sea. The river is known as the river of Golden sand in its upper course. This river flows through the Itchang eanyan to the east of red sea valley. There are many lakes like Tungting, Itchang in its course. Flood never occurs in this river. The tributaries of the river are Han, Siyang, Yunan etc. The river is navigable in his lower course.

Question 7.
State the characteristics of the climate of Asia.
Answer:
The characteristics of the climate of Asia.
i) There are different types of climate found in Asia due to its vastness. For example – the climate of the southern part of the continent is warm in nature, the climate of central Asia is moderate and the northern part is extremlly cold.
ii) The places of the continent far away from the sea experience extreme climate
iii) The climate of the plateau surrounded by the mountain is extremely cold.

Question 8.
Which is called the ‘Holland of China’ and why?
Answer:
The deltaic region of Yangtze-Kiang is called the ‘Holland of China’. The Kiangtsu province is occupied by the deltaic region. In this region a number of mursh lands, lakes and polder lands are found here. Like Holand different polder lands are common in this region. Thus it is called the ‘Holland of China’.

Question 9.
Which is called the ‘Manchester of China’ and why ?
Answer:
Sanghai is the largest city, industrial centre and prime port of China. Due to development of cotton textile industry Shanghai is known as the ‘Manchester of China’.

Question 10.
Write the characteristics of North flowing rivers of Asia.
Answer:
The characteristics of North flowing rivers of Asia-

1. The mouth of the rivers belong to the freezing zone thus the flood occurs here two times in a year–in autumn and spring.
2. Most of the year the rivers are covered with ice and so the rivers are not nevigable.
3. The bank of the rivers are scarcely populated.

Question 11.
State the characteristics of South flowing rivers of Asia.
Answer:
The characteristics of the south flowing rivers of Asia–

1. The rivers originate in the mountains and flow through the monsoon climate region.
2. In the lower course of the rivers flood occurs in the rainy season.
3. The rivers are navigable and suited to irrigational uses.
4. The river basins are densely populated.

Question 12.
State the characteristics of East flowing rivers of Asia.
Answer:
The characteristics of East flowing rivers of Asia–

1. Most of the rivers are originated from the mountain region of central Asia.
2. The east flowing rivers of Indian peninsula are rain water fed and rest of the rivers are ice fed.
3. The rivers are important for agriculture and trade.

Question 13.
State the climate features of Tundra climate of Asia.
Answer:

1. Winter is long and extremely cold.
2. In winter darkness prevails for six months in this region.
3. The temperature in winter remains below the freezing point.
4. Snow falls and hail storm occuns in winter.

Long Questions & Answers : (3 marks for each question)

Question 1.
Describe the mountain region of central Asia.
Answer:
The mountain region of central Asia is divided into three parts : a) The mountain ranges extended from Pamir-Knot. b) The mountain ranges extended from Eastern Himalayan Knot. c) The mountain ranges extended from Armenian Knot.
a) The mountain ranges extended from Pamir Knot – The Pamir plateau is situated to the northwest direction of Jammu-Kashmir of India (height – 4873 m ) which is called the ‘Roof of the World’. Then main mountain ranges of Asia have met one another in this region. So it is called the Pamir Knot. i) Karakoram mountain ranges extend from Pamir Knot towards South-East direction. ii) The Himalaya mountain ranges, the highest mountain ranges of the world, extend from Pamir Knot to the south. Mount Everest, the highest peak of the world, is the highest.peak of the Himalaya. iii) The Kuenlun and Altintag mountains are situated to the north east direction of Pamir Knot. Khinghan mountain is situated to the north east of Altintag. iv) Tiensun, Yablonoy, Altai, Khangai, Sayan Stanovoy mountains are originated from Pamir Knot and stretch upto North East fronteer.

b) The mountain ranges extended from Western Himalaya : From a small mountain Knot situated to the east of Himalay mountain i) Patkai, 2) Naga 3) Lusai and 4) Arakahoma stretch to the far extend of south. The part of these mountains extend to up to Indonesia under water of the sea.

c) The mountain ranges extended from Armenian Knot: There is a small mountain knot situated at Armanian plateau which is comparatively lower than Pamir Knot. The Kokesus mountain is situated to the north of this knot, and Jagros to the South east and Elburz to the East. Pontik is situated to the west and Tarus is to the south. Jagros joins with Khirthar after extending to the east.

Question 2.
Why is Asia called the land of Diversity ?
Answer:
Asia is called a land of diversity for its size, natural environment and many other reasons :

1. Geological diversity : In the continent of Asia old land like Angara land and Gondoana land are found as well as the new fold mountain like the Himalaya is also situated here.
2. Diversity in land : In this countinent in one hand the highest mountain peak the Mt. Everest is situated on the other hand lowest lake the dead sea is situated. The lowest part of the earth is Mariana Terench lies in this continent.
3. Diversity in rivers and lakes: The small icefed rivers are found here as well as long rain water feel river are also found. Lake with sweet water is situated here on the other hand the lake with saline water is also found.
4. Diversity in climate : The coldest place of the Earth Oyimeyakon is situated in Asia and Jacobabad, the hottest place of the earth is also situated here.
5. Diversity in vegetation : The largest forest of the world as well as desert region is also found here.
6. The diversity in setlement : The most density populated region is South Eastern Asia and the Syberia is scarcely populated area. Mureove, there is diversity in relegion life style of the people of Asia.

Question 3.
Give a description of the east flowing rivers of Asia.
Answer:
The east flowing rivers of Asia : As the mountain region of central Asia is extended towards the east, the rivers of central Asia flow towards east miander for the obstruction of mountain.
i) Yangtse (6300 Km) : Yangtse is the longest river of Asia. This river is originated from Kunlun mountain and flows to the South-east ward and is emptied in China Sea. The Golden sand is found at the bank of the river, thus it is called golden sand river. This river has many tributaries.

ii) Hwang Ho (5464 Km.) : Hwang Ho is also originated from Kuenlun Mountain and flows towards north-east direction. The mouth of this river is Bohai sea. The main tributaries of this river are Fhenho, Oaihe etc. As the rain and ice melting water flows through the river it is flood prone. This river is the cause of sorrow of the people. Thus river is known as the ‘Sorrow of China’. Now the pasibility of flood has been reduced. But it faciliates irrigation, communication generation of hydel power etc.

iii) Amur (2824 Km) : This river is generated from Yablonoi mountain and flows through the South east frontier of Soviet Union towards the east and is emtied into the sea of Okhatsk. The two main tributaries of the river are Sirka and Sungai.

iv) Si-Kiang – (1920 Km.) : This river is generated from Yunan Plateau and flows towards east to empty.in China Sea. The large point Kanlon of China is situated at the mouth of the river and thus the other name of the river is Kauton. This river is nevigable for its entire length. It is a commercial waterway of southern China.

Question 4.
Describe the South flowing rivers of Asia.
Answer:
The south flowing rivers are :
a) Mekong (4,909 Km) : This river is originated from Kuenlun mountain and is emptied in South China Sea.
b) Irrawaddy (2210 km) : This river is originated from Yunan Plateau and flows through Mayanmar. It emptied in Gulf of Martaban.
c) Brahmaputra (2,900 Km) : Brahnmaputra river is originated from Chemaungdung glacier and flows through India and Bangladesh. It emptied in Bay of Bengal.
d) Indus (2900 Km) : Indus is originated from Manas Sarobar of Tibet and flows through India and Pakistan. The tributaries of Indus are Jhelum, Beas, Satlej, Chinab, Ravi etc.
e) Ganga (2,510 Km) : Generating from Gangotri glacier river Ganga flows through the Vast region in India and is emptied in the Bay of Bengal. The tributaries of the river Ganga are Yamuna, Ramganga, Mahananda etc.
f) Tigris (1850 km), Euphrates (2800 km) : Tigris is originated from Kurdistan mountain , Euphrates originated from Armenian plateau and their mouth is Persian Gulf.

Question 5.
What are the causes of diversity of climate in Asia?
Answer:
The main causes of diversity of climate in Asia are :-
i) Latitude : The continent of Asia stretches from 10°S to 78°N latitude. Thus there is the vraities in insolation of the Sun. The sun rays fall vertically on the southern part of this continent through out the year. So this part esperiences hot climate through out the year. On the other hand the northern part experiences cold climate for inclining sun rays.

ii) Far away from the sea: The 1 / 3 part of this continent lies 1000 Km away from the sea. Some places lie 2500 Km away from the sea. These places experience extreme climate – the summer is too hot and the winter is too cold.

iii) Altitude : The altitude of central Asia is more due to the presence of high mountains and high lands. Therefore the temperature is comperatively low and snow falls occurs in the winter.

iv) Existing of mountains: The mountain ranges of central Asia influence the climate of Asia. These mountain ranges act as barrier to prevent the cold wind of north. On the other hand the moisture-laden wind gets obstructed by the mountain and causes rain fall.

v) Ocean current : The temperature of the north-east part of this continent remaining comperatively high in winter for the influence of warm Kuro-Shio current. Besides the dense mist found in eastern coast for the melting of warm Japan current.

vi) Wind : One-fourth of total rainfall is occured in the year for the moisture-ladan monsoon wind flows on the south or South eastern part of Asia. More over little rain fall occure in the western part of the continent for tire cyclonic wind coming from the Mideteranean sea.

Question 6.
How does the climate of Asia influence on vegetation ?
Answer:
The climate of a place influence the vegetation in this way –
i) The natural vegetation in the Equatorial region of Asia : The equatorial evergreen forest is found in Malayesia, Indonesia, Singapore for the high temperature and heavy rainfall through out the year. The trees are ebony, rosewood, palm etc.
ii) The vegitation of monsoon region of Asia. In the monsoon climate region the variation of vegitation is found for the variation of rainfall. This type of vagitation is found in Mayanmar, Vietnam, Bangladesh, India etc. The dense evergreen forest of rosewood, mehagony, deodar, bamboo is found in the region of heavy rainfall. Teak, Sal, Simul, Palash, Mango, Berry trees densely grow in the places of moderate rainfall.
iii) The vegitation of Mediterranean region of Asia : Turkey, Svria, Israel, Lebanon belong to the Mediterranean climate region and olive, cork, oak, lemon trees grow here.
iv) Moderate grassland or steppes: Thorny bushes or dwarf grass are found in the steppes region of South western. Syberia and eastern Mongolia for scanty rainfall.
v) The vegitation of moderate desert region: The grass and bushes are found in the Mongolian plateau and Gobi desert.
vi) The vegitation of manchurian region : The alpine forest of Pine, pruce, fer is found in Manchuria and north Japan.
vii) The vegitation of Taiga or Syberian climate: The rainfall is occured and the land remains snow covered in Taiga region of North Russia and north Syberia.
viii) The vegitation of China type climatic region : In the China type climatic region of Koria. South Japan. China the ever-green forest grow for hot and humid climate with heavy rainfall. Oak, campher, Camalia, Magnelia and the bamboos are the most valuable tree grown here.
ix) The vegitation of hot desert region : For the lack of water the trees and plants do not grow in Arbian desert and the desert of India and Pakistan.
x) Tundra typed vegitation : In Tundra typed climatic region of North Russia remain snow covered throughout the year. Moss, Lychen, Algae grow in this region.

Question 7.
Discuss the causes of economical prosperity of Yangtze basin.
Answer:
The causes of economical prosperity of Yangtze basin: The communication system, agriculture and industry are well developed here. The soil is very fertile. Rice, wheat, maize, potato. sugar-cane tobaco, tea. lemon are grown here with the help of irrigation. Different minerals are found here. They are coal, iron ore, copper, mineral salt, natural gas, zinc, lead, manganese etc. The labour is easily available as the river besin is densely populated. Plenty of river water, hydel power supply, highly developed communication system and location the world largest port Sanghai have made easily to export and import of manufacturing goods and therefore the Yangtze basin has prospered highly.

Question 8.
Give a short note on Tokyo industrial region of Japan.
Answer:
Tokyo industrial region is situated at the eastern part of Honshu in Kanto plain. It is the largest and greatest industrial region of Japan. 25% of total industrial goods of Japan are manufactured here.
The causes of the development

1. Plenty of coal iron ore and raw materials
2. the hydel power of the mountain region of Honshu.
3. The wool from Kanto plain.
4. Well developed communication and transport system.
5. The demand of the market.

The main industrial centres of this region are Tokyo, Yakohoma, Kawasaki, Chiba. The iron and steel factory, machinery, engineering, chemical, food processing and many other industries have been flourished here. The ship building factory, engineering and chemical industries have been set up in Yokohama.

Question 7.
What are the causes of prosperity of Tokyo-Yokohama Industrial region.
Answer:
Tokyo-Yokohama is the second largest indusrial centre of Japan. This region is situated at Kanto plain. The main industries of this region are iron and steel, engineering, oil refinery, chemical, wool and cotton textile, electronic goods, printing industries etc. Tokyo, the capital of Japan is the main city port and trade centre of this region. As the depth of nearly gulf is less, big ships can not enter here. So Yokohoma plays the role of external port of the country. The causes for the development of the industry:

1. Imported coal iron ore and raw materials:
2. Coal from local mines.
3. The hydelpower of the mountain region of central Honshu.
4. Wool from Kanto plain.

Question 10.
Give a short note on oilfields of south-west Asia.
Answer:
About 60% of the world’s total oil reserve are found in this region. This region extracts about 30% of total petrleum in the world. The major oil producing countries of this region are Soudi Arabia, Iran, IraqKuwait, Baharein etc. Saudi Arabia is the largest nation in the Arabian Peninsula. About 26% of the total reserves of the world is found in Saudi Arabia. It is maimly a hot desert. Ghawar, Abqaiq, DhahranSafaniya Manifa are main oilfields of Saudi Arabia. Masjid-i-suleman, Agha Jari, Gach Saran, Lali sre main oilfields of Iran.Kirkuk, Mosul are main oilfields of Iraq. Burgan, Magwa-All Hamadi, Aljara are main oilfields of Kuwait. Jabel Dukhan, Id-el-ljba are main oilfields of Qatar. What would be the price of petroleum in the world market, which country will sell what amount of petroleum to the export market, these are determined by the OPEC (Organisation of Petroleum Exporting Countries).

Additional Questions and answers :

Question 1.
Asia is called ‘Continent of Extremes’-Explain
Answer:
Asia, the largest and most populous continent, comprises of one-third of the total landmass of the world. You would he surprised to know that the continent of Asia is equal to four times of Europe and one and half times of Africa. This continent is so vast, that when the sun rises in the extreme west, then the sun almost sets in extreme east. High mountain ranges, large plateaus, extensive plains and fertile river valleys bring some special features in the continent of Asia which makes it different from other continents. So, Asia is known as the ‘Continent of Extremes’.

Question 2.
Why is Asia called ‘Cradle of civilization’?
Answer:

• Asia is different from others in respect of nation, religion, caste, art and culture, human race and different things.
• A number of river-based civilizations had developed in the large fertile river valleys of Asia around 3500-5000 B.C.
• Harappa-Mohenjodaro and Indus valley civilization (at present belongs to India & Pakistan) had developed along the river Indus.
• Mesopotamian and Sumerian (at present belong to Turkey & Iran) civilizations were developed along the Tigris-Euphrates river valleys.
• Hwang-Ho river valley was the basis of Chinese civilization.
• From the long past Asia had the influence of western civilization and a rich tradition.

Question 3.
Give a short description of great plains of the North.
Answer:
Low lands of Turan : The lowland in the southwestern parts of the northern plains, surrounding the Caspian Sea and Aral Sea is known as lowland of Turan.
Siberian Plain : This plain, located in the extreme north of Asia, is formed by the deposition of alluvium by the rivers Ob. Yenisei and Lena and also by glacial action. Flood is frequent here.
Shield Region : It is formed due to gradual erosion of old plateaus in the north east of the Great northern plains.
Alluvium deposited by several rivers in the south-eastern part of Asia, their deposited alluvium have formed a number of plains like the-1) North China Plains, 2) Indus Ganga-Brahrnaputra plains, 3) Mesopotamia Plains.

Question 4.
Give a short description of Yangtze Basin.
Answer:
The Szechuan basin is formed at the source of the river Yangtze by the deposition of four tributaries. Sandstones are abundant here and so the Szechuan basin is called the Red Basin. The red Basin extends from the source of Yangtze to Ichang. The climate of this region is very comfortable. This region prospers in agriculture and is densely populated.

Detailed explanations in West Bengal Board Class 7 History Book Solutions Chapter 2 Some Aspects of Indian Political History: A.D. 7th Century to 12th Century offer valuable context and analysis.

WBBSE Class 7 History Chapter 2 Question Answer – Some Aspects of Indian Political History: A.D. 7th Century to 12th Century

1. Fill in the blanks : (Full mark-1)

a. The name Vanga was first used in ___________ (Aitareya Aranyak/Ain-i-Akbari/ Arthashastra).
Answer:
Aitareya Aranyak.

b. The territory of ancient Bengal was constructed with the rivers ___________ and ___________ (Bhagirathi, Padma. Meghna/Ganga, Brahmhaputra, Sindhu/Krishna, Kaveri, Godavari).
Answer: Bhagirathi, Padma, Meghna.

c. The title Sakalottorapathanatha taken by is ___________
Answer: Harshabardhan. (Sasanka/Harshabardhan/Dharmapal).

d. One of the leaders of the Kaivarta revolt was is ___________
Answer: Bhima. (Bhima/Rampala/Mahipala).

e. During the reign of ___________ invasion occured in Bengal. (Bijaysena/Ballalsena/Laksmansena) the Turkish
Answer: Lakshmansena.

f. A historian in the Sultanate period was ___________ Muhammad Bukhtiyar Khalji) (Muhammad Ghori/Minhaj-i-siraj/
Answer: Minhaj-i-Siraj.

2. Match column A with B : (Full mark-1)

A	B
Bajrabhumi	Buddhist Bihar
Lo-to-mo-chih	Modern Chiţagong
Gangaikondachola	Bakpatiraj
Gourbaha	Northern Radha
Harikel	Al-Befuni
Kitab-al-Hind	Rajendra

Answer:

A	B
Bajrabliumi	Northern Radh
Lo-to-mo-chih	Buddist Bihar
Gangaikondochola	Rajendra
Gourbaha	Bakpatiraj
Harikel	Modern Chattogram
Kitab-al-Hind	Ai-Beruni

3. Answer in brief (within 30 – 50 words) : (Full mark-3)

a. Look at a recent map of West Bengal. Which rivers of the early medieval Bengal do you see in it?
Answer:
We can find Bhagirathi, Damodar, Meyurakshi, Subarnarekha, Mahananda, Tista, Rupnarayan, Kansai, Padma and Meghna.

b. Write the economic condition of Bengal during the reign of Sasanka.
Answer:
The use of gold coins during the reign of Sasanka was common. But its decreased gradually. Artificial gold coins were also available. There was no silver coin. A depression was noticed in the field of trade and commerce. Economy became agriculture-based. The importance of towns diminished because of recession in commerce.

Gradually, the growing importance of agriculture led to society becoming more rural based. The importance of mahattara or village headman increased. Shreshtis or traders gradually lost their power or importance in the society. In that period the village chief or local leaders became as much powerful as the Shresthis.

c. What is Matsyanyay?
Answer:
Matsyanyay suggests anarchism or the lack of permanent monarchy. The powerful people tortures the weaker people as the giant fishes eat up the smaller ones. From the middle of 7 th century up to the middle of 8 th century A.D. after the death of Sasanka, this period ranging about one hundred years is considerd as a period of transition.

In this phase every Kshatriya, aristrocrat, Brahmin and merchant ruled their respective area according to their own discretion. There was no central administration in Bengal. After many years of continued anarchism the influencial people selected one named Gopal in the mid 8th century. From then the Pala rule began.

d. How did the regional states develop in 7th and 8th century A. D.?
Answer:
Sasanka failed to set up a stable dynacty. After his death the power of Gauda declined. During 7 th and 8 th century A. D. the dynasties accepted the presence of local influential people. Big land holders or warrior chiefs were given various titles like samanta, mahasamanta. or mahamandaleswar etc.

Instead of that they would provide taxes and gifts to the king or the higher authority. Even they would take part in the battle field when king needs them. Again sometimes some of them in the scope of the king’s weakness became the independent ruler in their own region.

e. Where from did the Sena kings originate? How did they established their rule in Bengal?
Answer:
The Senas hailed from Karnata region in the South India, that is areas around mysore and its surroundings. They were hereditarily Brahmins but later became Kshatriya. Samanta Sen belonging to the sena lineage left karnata for Radh, a part of Bengal line on the western bank of the Ganges.

He came at a time round the eleventh century. The Kaivarta upraining at the end of the Pala rule paved the way for the foundation of the Sena kingdom. The Sena dynasty crame to an end after the Turkish invasion in 1204 – 05 A.D.

f. How did Sultan Mahmud utilise the wealth plundered from India?
Answer:
Sultan Mahmud plundered immenes wealth from India, but he used these wealth for noble work in his kingdom. He beautifully decorated Ghazni and other cities. He set up palaces. mosques, library, gardens, tanks, canals and also a dam over river Amudaria. He also founded a university where teachers were paid and students were given scholarships.

4. Answer the question in detail within (100 – 200 words) : (Full mark-5)

a. Give the geographical location of Radha-Suhneha and Gouda region of ancient Bengal.
Answer:
Ancient Radha of Ladha was divided into two areas. Northern and Southern Radha. According to join tradition Northern Radha was called Bajjyabhumi (Bajrabhumi) and Southern Radha was known as Surbhabhumi (Suhmabhumi). River Ajoy was the mid border of both North an South Radha.

Western part of present Murshidabad district, Birbhum district, some area of santhal parganas and Northern part of Katwa sub-division of Burdwan district were the part of North Radha. Southern Radha comprises Howrah.

Hooghly and other part of Burdwan district and the area between the river Ajoy and Damodar. Southern Radha was the nearest area of Bay of Bengal. Story of Maharashtra and poetic works of Kalidas evidently showed that the area between Bhagirathi and Kansai (Kangsabati) upto sea was within this area.

Gouda : In ancient and medieval period Gouda was the important territory of Bengal. Gouda was also known as the group of people according to the writings Barahamihir (sixth century B.C.) Murshidabad, Birbhum and western part of Burdwan district covered the area of the then Gouda.

From the seventh century of onwards during the reign of Sasanka the boundary of Gouda was extended. The capital of Sasanka was Karnasubarna. The main area of Gouda located in the western bank of Bhagirathi, Murshidabad in present district.

During the reign of Sasanka, the area from Pundravardhan (North Bengal) to the coastal area of Orissa was within the territory Gouda. During eighteen-ninteenth century A.D. Gouda referred to the whole of the Pala empire.

b. How was the relation of Sasanka with the Buddhists? Give your own opinion.
Answer:
By religious faith Sasanka was Saiva or the worshipper of Shiva. In the Buddhist literature Arya manjushreemulakalpa and writings of Hiten Tsang he was entitled as a malicious of Buddhism. The allegation against Sasanka was that he murdered some Buddhist saints and ruined some holly remains of Buddhism. Sasanka was condemned in Harshacharita of Banabhatta.

On the other hand Hiuen Tsang noticed the advancement of Raktamrittika Budhist Vihara near the city of Karnasubarna, a few years after the reign of Sasanka. Fifty years after the death of Sasanka chinese traveller, I-T sing found the development of Buddhism in Bengal.

It can be possible is Sasanka held hostile attitude to Buddhism deliberately. It can be said that all the writers were free from envious attitude against Sasanka. So it can be said that their opinions are to some extent exaggerated.

c. Among whom did the Tripartite struggle take place? What were the main causes of the struggle?
Answer:
From 8th century the conflict among Palas, Gurjara, Pratihars and Rastrakutas was continued. This is called as Tripartite struggle. During the reign of Harshavardhana Kanauj became important for its geographical position in Uttarapath. It was clear that who would control Kanauj could be able to capture the Ganga valley.

The river based trade and minerals were attractive in this region. Last of all who will be able to hold this power at Kanauj, a struggle started among Palas, Gurjara-Pratihars and Rastrakutas was continued. Near about two hundred years of the struggle, the power of the three dynasties became weak.

d. Observe the chart 2.1 carefuly. Now Compare between the Pala and Sena reign briefly.
Answer:
The Pala dynasty continued form 750 – 1200 A.D. The founder of Pala dynasty was Gopal. Name of the some eminent rulers of Pala dynasty were Gopal, Dharma Pal, Dev Pal, MohiPal-I, and RamPal. The Pala rulers took part in the Tripartite struggle for this the power of the Pala kings decreased and the Sena dynasty was established in Bengal.

The Pala kings patronised Buddhism, they helped to spread of education, art and architecture. The Kaivarta upraising at the end of the Pala rule paved the way for the foundation of the Sena kingdom. The Sena dynasty began in the eleventh century A.D. and it went out during the first few years of the thirteenth century. The Sena came to Bengal from Karnata region of the South India.

Samanta Sen was the founder of Sena dynasty in Bengal. Ballal Sena and Lakshman Sena were the eminent rulers of Sena dynasty. Ballal Sen took steps to reform the society and established a conservative and orthodox brahmanical rituals and practices. At the time of Lakshman Sena the Sena dynasty crumbled due to Turkish invasion in 1204-05 A.D.

e. Explain the background of the rise of Chola dynasty in South India. which regioes belonged to the Chola dynasty?
Answer:
Cholas established their kingdom enriching the islands of Kavery and its tributories. There Vijoyalay displaced king Muttaliya and established Chola dynasty. A new city named Thanjavur or Tanjore was built as their capital.

The Pandya region of South and Pallava region of the North came under the Chola dynasty. In 985 A.D. Rajaraja-I became able to established Chola supremacy on present Kerala, Tamilnadu and on the vast area of Karnataka.

His son Rajendra-I defeated the Chalukya power of Kalyani. He took the title Gangaikonda Chola after defeating the Pala king in an expedition against the’Pala dynasty. Both Rajaraja-I and Rajendra Cholas built up skilled Navy.

f. Give a brief description of Arabia before the rise of Islam. What were the changes brought about by Islam there?
Answer:
Beyond the Arabian sea in the western side of India. lies the Arabian Sea. A major part of Arabian Peninsula is either desert or dry grassland. Mecca and Medina were the two important cities of Arabian Peninsula. The nomadic tribes of the region were known as Bedouins, They used to rear camels.

The people used to call themselves as ‘Arab’. In beginnir’s of the 6th century A.D. some Arabs took up trade as their means of livelihood. Mecca was situated at the intersection of two trade routes. Hence classes between different tribes for the possession of Meca was a regular affair. Hazrat Muhammad was also a merchant.

Hazrat Muhammed introduced a single faith to curb differences among the various Arabian tribes. So harmony gradually developed among the tribes. Muhammad’s beliefs differed from the pagan practices of the traditional residents of Mecca. In A.D. 622, Muhammed along with his followers, went to Medina. Within ten years Muhammed conquered vast areas of the Arabian land. His influence also extended to Mecca.

Class 7 History Chapter 2 Question Answer West Bengal Board – Some Aspects of Indian Political History: A.D. 7th Century to 12th Century

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
‘Suba’ means a _______
i. village
ii. small area
iii. district
iv. province
Answer:
iv. province

Question 2.
‘Arthashastra’ was written by  _________
i. Kalidasa
ii. Kautilya
iii. Abul Fazal
iv. Minhaj-i-Siraj
Answer:
ii. Kautilya

Question 3.
The triangular shaped deltaic region between the two rivers Bhagirathi and Padma was known as _____
i. Vanga
ii. Varendra
iii. Vangala
iv. Pundravardhana
Answer:
i. Vanga

Question 4.
Karnasuvarna was an important centre for _________
i. commerce
ii. administration
iii. commerce and administration
Answer:
iii. commerce and administration

Question 5.
Sasanka was condemned by _________
i. I-Tsing
ii. Xuanzang
iii. Banbhatta
Answer:
iii. Banbhatta

Question 6.
After the death of Ramapala, the Pal dynasty came to an end _________
i. within fifty years
ii. within thirty years
iii. after twenty years
iv. after fifty years
Answer:
i. within fifty years

Question 7.
The Kaiverta revolt took place during the reign of _________
i. Senas
ii. Palas
iii. Sasanka
iii. Harsabardhana
Answer:
ii. Palas

Question 8.
The capital of Lakshmanasena was _________
i. Prayag
ii. Lakshnavati
iii. Benaras
iv. Bikrampur
Answer:
iv. Bikrampur

Question 9.
Minhaj-i-Siraj was a- _________
i. scientist
ii. historian
iii. ruler
iv. invader
Answer:
ii. historian

Question 10.
Al Beruni wae a scholar in-_________
i. History and Literature
ii. History and Philosophy
iii. Philosophy and Mathematics
iv. Astrology and Mathematics
Answer:
iii. Philosophy and Mathematics

Question 11.
Mohammed Ghori wanted to- _________
i. rule India
ii. travel India,
iii. invade India
Answer:
i. rule India

Question 12.
Bakhtiyar Khalji died in -_________
i. 1126
ii. 1212
iii. 1210
iv. 1206
Answer:
iv. 1206

Question 13.
Delhi Sultanate was established by _________
i. Mohammad Ghori
ii. Qutbuddin Aibak
iii. Sultan Mahmud
iv. Muhammad Qasim
Answer:
ii. Qutbuddin Aibak

Question 14.
Second battle of Tarain was held in _________
i. A.D. 1192
ii. A.D. 1092
iii. A.D. 1190
iv. A.D. 1182
Answer:
i. A.D. 1192

Question 15.
Gurjara-Pratiharas ruled over vast areas of _________
i. Assam and Rajasthan
ii. Assam and Bengal
iii. Rajasthan and Gujrat
Answer:
iii. Rajasthan and Gujrat

Fill in the blanks : ( 1 mark for each question)

1. The word Vanga appears first in the ______
Answer:
Aitareya Aranyaka.

2. ______ was a historian of the Mughal age.
Answer:
Abul Fajal.

3. Southern Radh was called ______
Answer:
Subarnabhumi

4. Samatata was located on the eastern side of the river ______
Answer:
Meghna

5. During anarchy the ______ exploit the weak.
Answer:
mighty

6. After the death of Sasanka Karnasubarna was occupied by ______
Answer:
Bhaskarvarma

7. Use of gold coin was common during the time of is ______
Answer:
Sasanka

8. The founder of the Pala dynasty was
Answer:
Gopala

9. Originally the Senas were ______
Answer:
Brahmins

10. During the reign of Palas the ______ revolt took place.
Answer:
Kaivarta

11. Hazrat Muhammed was called the ______ of Allah or God.
Answer:
prophet

12. In A.D. 622, Muhammed along with his followers, went to ______.
Answer:
Medina

13. After the Arabs, another Muslim power, the —— invaded India.
Answer:
Turks

14. Bakhtiyar Khalji attacked Tibet but he was ______
Answer:
unsuccessful

State whether True or False: (1 mark for each question)

1. The name of Vanga is mentioned in the Arthashastra of kautilya.
Answer:
True

2. Pundravardhana was the largest among the territories of ancient bengal.
Answer:
True

3. Samatata was located in the western side of the river meghna.
Answer:
False

4. Karnasubarna was the capital of Gauda kingdom.
Answer:
True

5. The Pala dynasty came to an enf after the death of Ramapala.
Answer:
False

6. The Kaivarta king Bhima was a popular ruler.
Answer:
True

7. The kings of the Sen dynasty started to rule in Bengal in the 10th century.
Answer:
False

8. King Bhoja was a very weak ruler.
Answer:
False.

9. Mecca and Medina were the two important cities of the Arabian Peninsula.
Answer:
True

10. The migration of Hazarat Muhammad from Mecca to medina is called Hijrat.
Answer:
True

11. Sultan Mahmud wanted to rule India.
Answer:
False

12. Caliph is both the political and the religious leader of the islamic world.
Answer:
True

13. Al beruni came to India and wrote Shahnama.
Answer:
False

14. The Turks conquered Nadia after a great fight.
Answer:
False

15. Bakhtiyar Khalji attacked Tibet but he was unsuccessful.
Answer:
True.

Answer in brief (within 30 – 50 words) : (Full mark-3)

Question 1.
What is Vanga?
Answer:
The word Vanga first appeared in in the Aitareya Aranyaka of the Rig Veda. In ancient bengal, the region which was identified as Vanga was hardly a vast geographical area. Among the Janapadas of ancient Bengal Vanga was only a division.

Question 2.
What were the main regions of ancient Bengal?
Answer:
The main regions of ancient Bengal were Pundravardhana, Varendra, Vanga, Vangla, Radh, Suhma, Gauda, Samatata and Harikel. Usually a region was named after the name of inhabitants. Vanga, Gauda, Pundra etc. were the names of different clans.

Question 3.
Give a short description of Pundravardhana.
Answer:
Pundravardhana was the largest among the territories of ancient Bengal. It was spread over West Bengal as well as in some districts of Present Bangladesh like Dinajpur, Bogra, Rajsahi and Pabna. During the Gupta age Pundravardhana was a territorial division.

Question 4.
Write about the divisions of Radh.
Answer:
Ancienr Radh or Rarh had two divisions : Northern Rarh and Southern Rarh.Northern Rarh included the western part of present Murshidabad, Birbhum, some areas of Santhal Perganas and northern side of Katwa sub-division of Burdwan District. Southern Radh included the areas of present day Howrah, hooghly, the remaining areas of Burdwan district.

Question 5.
Write about the location of Samatata.
Answer:
Ancient Samatata was located on the eastern side of the river Meghna. Based on the plains of Comilla-Noakhali of present Bangladesh the ancient territory of Samatata was formed. The river meghna seperated Eamatata from the rest of bengal.

Question 6.
What was the importance of Karnasuvarna.
Answer:
Karnasuvarna was an important centre for commerve and administration. Essential goods were brought from the neighbouring village for the daily use of tte citizens. Before the reign of Sasanka, trade and commerce existed between this region and South-East Asia.

Question 7.
Was Sasanka hostile to Buddhism?
Answer:
Sasanka was condemned by Banbhatta. But a few years after the reign of Sasanka Xuanzang noticed the prosperity of Rakta-mrittika Buddhist vihara on the outskirt of the Karnasuvarna. Fifty years after the death of Sasanka, Chineese traveller I-Tsing also noticed the development of Buddhism in Bengal. So sasamka was not hostile to Buddhism.

Question 8.
What was Goudatantra?
Answer:
The administration that developed in the reign of Sasanka was called Goudatantra or Gouda system. In this system, the officials or civil servanis set up a proper system of governance. The administration started to interfere in what was earlier the responsibility of the local village community.

Question 9.
What happened to Gauda after the death of Sasanka?
Answer:
After the death of Sasanka the power of Gauda declined. Anarchy became rampat in Bengal. Various parts of bengal were then occupied initially by the king of kamarupa and and later by Jogynaga of the Nagas and the rulers of Tibet.

Question 10.
What is Tripartite struggle?
Answer:
Since the 18th century A.D. there was a conflict between the Palas, Gurjar-Pratihars and the Rastrakuts over the control of Kanauj. This is called the Tripartite struggle. The struggle continued for almost two hundred years and destroyed the three dynasties.

Question 11.
Who founded the Chola dynesty?
Answer:
The Cholas set up their kingdom on the deltaic region of Kaveri and its tributaries.Vijayalaya overthrew king Muttabaiya and founded the Chola dynasty. A new town calledTanjore was set up as the capital of the Cholas.

Question 12.
What is Caliph?
Answer:
There was a question, who would lead the Islamic kingdom after Muhammad. Main four disciples were then nominated one by one to be the leader of the Muslim community. They were called Caliph. The word ‘Caliph’ means representative or successor.

Question 13.
Why Sultan Mahmud and Muhammad Ghori attacked India?
Answer:
Sultan Mahmud invaded India because he wanted to accunulate wealth for his empire in Khorasan in central Asia. on the other hand Molammad Ghori invaded to rule India. He, in A.D. 1192, defeated the Rajput king Prithviraj Chauhan III in the second battle of Tarain.

Question 14.
What is Hijrat?
Answer:
Hazrat Muhammad’s beliefs differed from the pagan practices of the traditional residents of Mecca. In A.D. 622, Muhammad along with his followers, went to Medina. This migration from Mecca to Medina is called Hijrat.

Answer the questions in detail within (100 – 200 words) : (Full mark-5)

Question 1.
What do you know about Gauda?
Answer:
Gauda was an important region in the ancient and medieval age. Gauda was also a name of a clan. According to Varahamihira Gauda was formed with the present day Murshidabad, Birbhum and the western part of Burdwan district. In the 7th century, during the reign of Sasanka, the territory of Gouda expanded. he had his capital at Karnasuverna.

In those times the main areas of Gauda was on the western bank of river bhagirathi. During the reign of Sasanka the territoy extended from Pundravardhana to the coastal areas of Odisha. During the 8th-9th century Gauda referred to the whole of the Pala empire.

Question 2.
Write what do you know about Sasanka.
Answer:
Sasanka was a vassal of the Gupta Emperor. He became the lord of Gauda a few years before A.D.606-07. Almost 60-70 yers prior to the reign of sasanka, Gauda had already become the seat of political power. During the time of Sasanka, the importance of Gauda increased. Sasanka ruled as an independent ruler of gauda till his death.

During his reign various regional powers of Morthern India came close to each other through feud or friendship. Sasanka took part in this conflict. He expanded his kingdom to the north-west in Benaras. He occupied the whole of gauda, Megadha-Bodh Gaya and part of Odisha. He was able to enhance the glory of Gauda by engaging in comflicts with the powerful states of Northern India. This was an attribute to his great political achievement.

Additional Questions and answers

Question 1.
Give a short note on Pala Dynasty.
Answer:
The first hundred years of Pala rule was the period of extending their domination. In the later 130 years their influence gradually declined. The founder of the Pala dynasty, Gopala, included almost all of Bengal within his kingdom.

His successor, Dharamapala, took part in the ‘Tripartite Struggle’ for control of northern India. His son, Devapala expanded the frontiers of his empire quite like the other kings of north and south India. During his reign, the empire extended from the foothills of the Himalayas in the north to the Vindhyas in the south and from Kamboja in the north-west to Pragjyotishpur in the east.

The domination of the Palas started to wane after the reign of Devapala. The reason was inner conflict of the Pala rulers. Moreover, in the 9th century the Rashtrakutas of the Deccan, the Pratiharas of the western region and the rulers of Odisha conquered many parts of Bengal and Bihar.

As a result, the existence of the Palas in Bengal was at stake. Their kingdom was restricted to the limits of Magadha. However, during the time of King Mahipala I there had been an attempt to revive the former glory of the Pala reign.

Ramapala became king towards the end of the 11th century. The entire Varendra region went beyond the control of the Palas as a result of the Kaivarta revolt. Ramapala succeeded in recovering it. He was able to restore the domination of the Palas to some extent. However, the Pala dynasty came to end within fifty years after the death of Ramapala.

Question 2.
Write a short note on Kaivarta revolt.
Answer:
During the reign of the Palas the Kaivarta revolt took place. The Kaivartas were probably boatmen or fishermen. In that period the Kaivartas had influence in North Bengal. The account of the revolt can be found in the Ramcharita of Sandhyak ar Nandi. Three leaders of that revolt were Divya (Divvok), Rudok and Bhim. Divya was an official of the Pala empire during the reign of Mahipala II.

Taking advantage of the weakness of the Pala kings, he revolted. Mahipala was killed while suppressing the revolt. Divya captured Varendra and became its ruler. Not much is known about the magnitude of the revolt or the number of people supporting the revolt. Ramapala. the younger brother of Mahipala tried to defeat Divya and recover Varendra but he failed.

The Kaivarta king Bhima was also a popular ruler. At this time the authority of the Palas was limited to North Bihar and North-West of Bengal. Ramapala later defeated and killed Bhima with the help various chieftains (Samanta) of Bengal and Bihar. After that he established Pala rule in Varendra. Kamarupa of Bengal and part of Odisha. This revolt had exposed the weakness of central authority in the later part of Pala rule.

Question 3.
Write about the Sena dynasty.
Answer:
The kings of the Sena dynasty started to rule in Bengal in the 11th century. Their dynasty came to an end towards the beginning of the 13th century. The rulers of the Sena dynasty were originally from the Karnata region of South India. Originally they were Brahmins, but later became Kshatriyas.

Samantasena of the Sena lineage had left Karnata for Radh some time ago. During the rule of Samantasena and his son Hemantasena. the Senas had developed some domination over the Radh region. Vijaysena, the son of Hemantasena. expanded the territory of the Sena dynasty by occupying Radh, Gauda, eastern Bengal and Mithila.

Ballalsena, the next ruler defeated the Pala king Gobindapala. Thus Ballalsena struck the final blow on the Palas. He reformed the society and established orthodox Brahmanical rites and practices. His son and successor Lakshmanasena established his domination over Prayag. Benaras and Puri. His capital was Bikrampur in castern Bengal. Another important town of that period was Lakshmanavati (Gauda). In A.D. 1204/5 the Sena dynasty came to an end with the invasion of the Turks.

Question 4.
Write about the Cholas of South India.
Answer:
The Cholas set up their kingdom on the deltaic region of Kaveri and its tributaries. Vijayalaya overthrew King Muttabaiya, the ruler of the area. and founded the Chola dynasty, A new town called Thanjavur or Tanjore was set up as the capital of the Cholas’. The successors of Vijayalaya expanded their kingdom further. The Pandya region of the south and the Pallava region of the north came under their control. In A.D. 985 Rajaraja I was able to establish the Chola supremacy in present Kerala.

Tamil Nadu and in the vast areas of Karnataka. His son Rajendra. defeated the Chalukya power of Kalyani. He adopted the title Gangaikondachola after defeating the Pala king on the banks of the river Ganges in an expedition against the Pala dynasty. Both Rajaraja I and Rajendra I set up efficient navies. As a result, the Cholas were able to maintain control over commerce between India and the South East Asian countries.

Question 5.
Write a short note on Sultan Mahmud of Ghazni.
Answer:
Sultan Mahmud is known as an invader in the history of India. But he was not just a warrior. Although he plundered immense wealth from India, he used it for noble work in his kingdom, puring his time, his capital Ghazni and other cities were Beautifully decorated. Mahmud set up palaces, mosques, library, gardens, tanks, canals and also a dam over river Amudaria.

He also founded a university where teachers were paid and students were given scholarships. Two notable persons during his time were Al Biruni and Firdausi. Al Biruni came to India as a traveller. His book, Kitab al-Hind, is an important document in the history of India to know about this period. The poet Firdausi wrote the Shahnama.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 8 Soil Pollution offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 8 Question Answer – Soil Pollution

Match the following (Page no. 81)

A	B
1. Smoke from factories	1. Increase in urbanization
2. Excessive use of pesticides and fertilisers in agricultural fields	2. Main cause of soil pollution
3. Population growth	3. Increase fertility of soil
4. Soil pollution	4. Helps in occurance of acid rain
5. Earthworms, insects and other organisms living in soil	5. Destroys fertility of soil
6. Disposing offwaste here and there	6. Various kinds of disease

Class 7 Geography Chapter 8 Question Answer West Bengal Board – Soil Pollution

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
Increase of demand for settlement is the cause of-
i) fertility of soil decreases
ii) deforestation
iii) soil poHution
iv) acid rain
Answer:
ii) deforestation

Question 2.
Soil loses its quality because of-
i) garbage
ii) chemical fertilizers
iii) industrial wastes
iv) all are true
Answer:
iv) all are true

Question 3.
If the soil of the flower pot is polluted-
i) the plamt will die
ii) growth of the plant will stop
hii) flower will not bloom
iv) the plant will change its colour
Answer:
i) the plamt will die

Question 4.
Increase in number of vehicles due to urbanization is the cause of-
i) soil erosion
ii) pollute underground water
iii) acid rain
iv) deforestation
Answer:
iii) acid rain

Question 5.
Accident occured in Union Carbide factory in Bhopal in-
i) 1980
ii) 1990
iii) 1884
iv) 1984
Answer:
iv) 1984

Question 6.
Accident occured in Chernobyl Neuclear reactor in-
i) 2011
ii) 2009
iii) 2010
iv) 2015
Answer:
i) 2011

Question 7.
Use of paper or jute bags instead of polythene can prevent –
i) air pollution
ii) soil pollution
iii) water pollution
iv) sound pollution
Answer:
ii) soil pollution

Question 8.
Use of chemical fertilizers and pestisides excessively can cause –
i) air pollution
ii) sound pollution
iii) water pollution
iv) soil pollution
Answer:
iv) soil pollution

Fill in the blanks : (1 mark for each question)

1. Use of more _______ manure in agriculture can prevent soil pollution.
Answer:
organic

2. Planting more trees prevent _______ pollution.
Answer:
soit

3. Smoke emitted from vehicles cause _______.
Answer:
air pollution

4. Industrial wastes pollute surface and _______ water.
Answer:
underground

5. Trace of pesticides in crops may cause _________
Answer:
cancer

6. Demand of industrial products ________ on account of population growth.
Answer:
increase

7. Virus and _______ grow in garbage heap of houses, markets and hospitals.
Answer:
bacteria

8. Less amount of crops grow in the rough soil of ______.
Answer:
Purulia

9. Accident occured at _____ of Chernobil in Ukraine.
Answer:
nuclear reactor

10. The is the living place of all plants and _______.
Answer:
animals

State whether True or False : (1 mark for each question)

1. Soil is the best gift of nature.
Answer:
true

2. 80% people of the total population of this earth is living on 12 % of total land mass of the earth.
Answer:
false

3. Soil is polluted when it loses its fertility or quality.
Answer:
true

4. Indiscriminate use of soil causes soil erosion.
Answer:
true

5. Poisonus gases emitted from factories causing water pollution.
Answer:
false

6. Excavation of excessive soil for making bricks in kilns is one of the causes of soil erosion.
Answer:
true

7. DDT is one kind of chemical fertilizer.
Answer:
false

8. Soil is present at the uppermost layer of landmass.
Answer:
true

Match the column A with column B.

A	B
1) Deforestation is connected with	a) cause acid rain
2) Increase in need of food	b) thermal power plants
3) Insects and worms die	c) in Bhopał, India
4) Smokes emitted from vehicles	d) urbanization
5) In garbage heap	e) due to population growth
6) Fly ashes spread from	f) causes soil erosion
7) Union Carbide factory is situated	g) virus and bacteria grow
8) Indiscriminate use of soil	h) for soil pollution

Answer:
1. Deforestation is connected with urbanization.
2. Increase in need of food due to population growth.
3. Insects and worms die for soil pollution.
4. Smokes emitted from vehicles cause acid rain.
5. In garbage heap virus and bacteria grow.
6. Fly ashes spread from thermal power plants.
7. Union Carbide factory is situated in Bhopal, India.
8. Indiscriminate use of soil causes soil erosion.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
From what soil is originated?
Answer:
Soil is originated due to erosion of rocks over a long period.

Question 2.
What is soil?
Answer:
Soil is upper level of landmass.

Question 3.
When soil is polluted?
Answer:
Soil is polluted when it loses its fertility or quality.

Question 4.
What is the living place of plants and animals?
Answer:
Soil is the living place of plants and animals.

Question 5.
Why huge amount of paddy, jute and vegetables grow on the banks of the Ganga?
Answer:
The silt soil of this area is very fertile.

Question 6.
Which is not bio-degradable?
Answer:
Polythene and plastic goods are not bio-degradable.

Question 7.
How transport is responsible for air pollution?
Answer:
Smokes emited from vehicles cause air pollution.

Question 8.
What is the relation between population growth and industrialisation?
Answer:
Demand for industrial productsincrease on account of population growth.

Question 9.
When Bhoopal Gas accident occured?
Answer:
Bhoopal Gas accident occured in 1984.

Question 10.
What is the advantage of using paper or jute bags instead of polythene?
Answer:
Soil pollution can be prevented.

Question 11.
What is responsible for acid rain?
Answer:
Air pollution by poisonus gas emitted from factories is responsible for air pollution.

Question 12.
What is the cause of increase of demand for settlement?
Answer:
Population growth is the cause of increase of demand for settlement.

Short Questions & Answers : (2 marks for each question)

Question 1.
What is the result for excessive use of chemical fertilizers and pesticides?
Answer:
Food value of crops is deminished, trace of pesticides in crops may cause cancer. Small animals, insects and worms living in soil die.

Question 2.
State the incident of Bhopal.
Answer:
In 1984 from the factory of Bhopal in India poisonous gas mixed with the air resulted too many people’s death and many were disabled for this reason.

Question 3.
How is soil polluted from the Thermal Power plants ?
Answer:
The flying ash and the part of burnt charcoal mix with soil. thus the soil is polluted.

Question 4.
What may happen if filthy oil is poured in to the flower pot?
Answer:
If dirty oil is poured at the root of the plant the plant could not be nounished from the soil. The plant will die as the soil becomes poisonous.

Question 5.
Soil hold the life — Explain.
Answer:
The best gift of nature is soil. The upper layer is of the land mass is soil. Human beings and other living things depend on soil for their habitat, food and shelter. So it can be clearly stated that soil holds life on Earth.

Question 6.
What happened in Chernobyl and Fukusima Daichi?
Answer:
Accident occured in 1986 in Chernobyl nuclear reactor in Ukraine. An other accident occured in Fukushima Daichi nuclear reactor in Japan in 2011.

Long Questions & Answers : (3 marks for each question)

Question 1.
What are the causes of soil pollution ?
Answer:
i) Pollution from industry : The poisonous waste, sewage, oily substances, metalic substances, plastic from industries are thrown out in the soil and make the soil polluted. Gasious substances mix with soil with rain water. Flyash from thermal power plant mixes up with soil and destroys soil fertility.

ii) Use of fertilizer and insecticide : Excessesive quantity of fertilizer and insecticide is used to increase the crop production. But this fertilizer closes the gaps of the soil and thus the air can not enter in soil. For this reason soil fertility reduces. The insecticides can destroy the ecofreindly insects with other insects.

iii) Plastic like garbage : The plastic is artificial organic compound which is a non-decaying substance. It can not be destroyed easily. At present plastic is used in many countries. These can block the drains and canals and destroy the fertility of soil.

iv) Over growth of population : For over growth of population the household garbage used by the people is thrown on the soil and makes it polluted.

v) Felling of trees : The forest cover of the earth is gradually decreasing due to the felling of trees unwisely. So the soil is eroded. The rainfall is decreasing. The soil pollution is occured for the lowering of soil fertility.

Question 2.
What are the harmful effects of soil pollution?
Answer:

1. The farming is effected by soil pollution.
2. Lead, murcury, zinc are mixed with soil and change the acidic and alkaline quality of the soil.
3. The useful bacteria of earth is destroyed for soil pollution.
4. Excessive use of fertilizer and insecticide changes the taste of the crops and nutrient value. Thus various diseases of malnutrition is caused. The nerves of human body, eye sight become week.
5. The pollutants from nuclear reactor mixes with soil. This chemicals accumulate the plants that grew in this soil. The cells of human body are destroyed and it causes cancer and other disease.
6. Soil pollution causes tremendous effect on living world. So the soil pollution is responsible for destroying balance of nature.

Question 3.
What are the preventive measure of soil pollution?
Answer:

1. The waste of household should be thrown away in a certain place.
2. Instead of polly bag, paper bag, sal leaves, jute bag, earthen pot should be used.
3. The use of fertilizer in the farmland should be reduced. Use of pesticide should be replaced by use of organic method.
4. The garbage should be treated by highly developed technology.
5. Respond to nature’s call we should proper toilet.
6. We should be aware at the time of using radioactive substance.
7. Inflamable garbage should be burnt.
8. The ash of thermal power station should be reused in proper way to prevent soil pollution.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 7 Water Pollution offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 7 Question Answer – Water Pollution

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
A water bourn disease-
i) cholera
ii) jaundice
iii) Typhid
iv) all the disease
Answer:
iv) all the disease

Question 2.
The percentage of the water in world is saline sea water-
i) 97 %
ii) 99 %
iii) 3 %
iv) 66 %
Answer:
i) 97 %

Question 3.
Cause for black foot disease-
i) arsenic pollution
ii) fluoride pollution
iii) cadmium pollution
iv) mercury pollution
Answer:
i) arsenic pollution

Question 4.
Itai-Itai disease is due to-
i) arsenic pollution
ii) fluoride pollution
iii) cadmium pollution
iv) mercury pollution
Answer:
iii) cadmium pollution

Question 5.
Problems of teeth and bone is due to-
i) arsenic pollution
ii) fluoride pollution
iii) cadmium pollution
iv) mercury pollution
Answer:
ii) fluoride pollution

Question 6.
Minamata disease is due to-
i) arsenic pollution
ii) fluoride pollution
iii) cadmium pollution
iv) mercury pollution
Answer:
iv) mercury pollution

Question 7.
Liquid mercury waste was released into the sea in Japan in-
i) 1942
ii) 1932
iii) 1935
iv) 1937
Answer:
ii) 1932

Question 8.
Exhaust fumes from factory-chimneys and vehicles emiting-
i) Sulphur dioxide
ii) Nitrogen oxide
iii) Carbon dioxide
iv) all are true
Answer:
iv) all are true

Fill in the blanks : (1 mark for each question)

1. Haldia Petrochemical industry is situated at the mouth of _______ river.
Answer:
Haldi

2. Chilka Lake is situated at the state of ________.
Answer:
Odisha.

3. During the gulf war many oil wells were ignited in _______ .
Answer:
Kuwait

4. Nitrates in fertilizers can cause ________.
Answer:
cancer

5. Medical wastes from hospitals can pollute _________.
Answer:
water

6. Chlorine and Fluoride also polutes _________.
Answer:
water

7. ___________ of the earth’s surface is covered with water bodies.
Answer:
three fourths

8. A large quantity of fish has died at Kuttuner of _________.
Answer:
Kerala

9. Soaps and detergents are also sources of water _________.
Answer:
pollution

10. Warm effluents of from thermal and nuclear power plants can reduce the ___________ in an aquatic environment.
Answer:
oxygen

State whether True or False : (1 mark for each question)

1) Presence of excessive fluorine and chlorine in water is harmful for heaith.
Answer:
true

2) 90 percent of the water on earth is saline sea water.
Answer:
false

3) Major rivers of the world are mush poluted.
Answer:
true

4) Demand for fresh water remains the main problem for the people all over the world.
Answer:
true

5) Drinking water from Ganga is safe.
Answer:
false

6) Rajasthan is suffering from acute water crisis.
Answer:
true

7) The cultivation of fish at the disheries of the wetlands of East Kolkata has increased.
Answer:
false

8) Dark lesions formed on the palms or sole of the feet are called Blackfoot disease.
Answer: true

9) As a result of eutrofication the percentage of oxygen in the water decreases.
Answer:
true

10) Minamata disease san occur due to cadmium pollution.
Answer:
false

Match the following : (1 mark for each question)

Match the column A with column B.

A	B
a) Black foot disease–	i) mercury pollution
b) Itai-Itai disease–	ii) causing death of marine creature
c) Flurosis disease–	iii) cadmium pollution
d) Minamata disease–	iv) death of people and animals
e) Mineral oil pollution in Persian Gulf	v) covered with water bodies
f) Mercury pollution at Minamata bay–	vi) arsenic pollution
g) Three-fourths of the earth’s body	vii) as our mother
h) We worship Ganga	viii) fluoride pollution

Answer:
a) Black foot disease–arsenic pollution
b) Itai-Itai disease–cadmium pollution
c) Flurosis disease–fluoride pollution
d) Minamata disease–mercury pollution
e) Mineral oil pollution in Persian Gulf causing death of marine creature
f) Mercury pollution at Minamata bay–death of people and animals
g) Three-fourths of the earth’s body covered with water bodies
h) We worship Ganga as our mother

Very Short Questions & Answers : (1 mark for each question)

Question 1.
What is water pollution
Answer:
When the unwanted substances and germs mix with water and make it unfit for use, it is called water, pollution.

Question 2.
How much part of the world is covered with water and how much part with land?
Answer:
The three-fourth part of the world is covered with water and one fourth is land.

Question 3.
How many part of the earth is covered with sweet water?
Answer:
One part of the world is covered with sweet water.

Question 4.
Which pollution was occured at Minamata in Japan?
Answer:
Mercury poliution was occured at Minamata in Japan.

Question 5.
What cultivation is done in the wetlands of East Kolkata?
Answer:
In the wetlands of East Kolkata the cultivation of fish is done.

Question 6.
What diseases is caused due to cadmium pollution?
Answer:
Due to the cadmium pollution Itai-Itai diseases is occured.

Question 7.
What diseases is caused due to arsenic pollution?
Answer:
Due to the arsenic pollution black foot diseases is occured.

Question 8.
What diseases is caused due to fluoride pollution?
Answer:
Due to the fluroride pollution flurosis diseases is occured.

Question 9.
What happened during the Gulf war?
Answer:
A large quantity of mineral oil polluted the Persian Gulf.

Question 10.
What happened after the formation of petro chemical industry at Haldia?
Answer:
Frequent visit of Hilsa fish at the mouth of the Haldi river has decreased.

Question 11.
Which chemical is added to for purifying water?
Answer:
Chlorine is added to for purifying water.

Question 12.
What happens if phenyl is added with the water of aquirium?
Answer:
The fishes will die if phenyl is added with the water of aquirium.

Short Questions & Answers : (2 marks for each question)

Question 1.
How did water get polluted at time of gulf war?
Answer:
At the time of gulf of war many oil wells in quait were ignited. For this a large quantity of mineral oil mixed with the water of Persian gulf. That caused the death of many sea animals.

Question 2.
What is the cause of reducing the visit of Hilsha fish at the mouth of Haldi river?
Ans. Haldia Petro Chemical industry has been set up. Thus the chemical waste of this factory mixes with the water of Haldi river that causes the pollution of water. It has reduced the visit of Hilsha fish at the mouth of Haldi river.

Question 3.
What is the cause of redusing fish cultivation at the fisheries of the wetlands of East Kolkata.
Ans.
The cause of reducing of fish cultivation at the fisheries of the wetlands of East Kolkata is water pollution. This is for using pesticides in the farmland.

Question 4.
What is Eutrophication?
Ans.
A heavy amount of weeds hyacinth grows for mixing of soap, phosphates of detergent in water of confined pond and wetland which is called Eutrophication.

Long Questions & Answers : (3 marks for each question)

Question 1.
What are the possible causes of water pollution?
Answer:
The causes of waster pollution-
i) Pollution from industry : The polythene plastic, mineral oil, amonia, cholrin, phenol copper, zinc, murcury wastes from various industries drain into water bodies and make the water polluted.
ii) Pollution from house hold: The grabage of daily household like peels of vagitables. fruits, stool-Urine, soap, ditergent, phenyle etc mix with local water bodies through ditches resulting water pollution.

iii) Water pollution from farmland : The insecticides, pesticides, fertiliser used in farmland, get mixed with pond water, river water through the rain water or canals and pollute the water.
iv) Pollution from fisheries: In the fisheries chemicals are used for the growth of fish and that pollute the water.
v) Radioactive substances: The radio active substances used in atomic reactor plants thrown intoi sea or river water and pollute water.
vi) Pollution from oil carrier ship : After accident of oil carrier ship or the time of oil mixing oil spilt in the sea water and makes it polluted.
vii) Water pollution from air pollution: The sulpher dioxide, nitrogen oxide, carbon dioxide accumulate in the air from the air emitted by the factory and vehicles. These pollutants mix with rain water and make the ground water polluted.
viii) Dead animals : The dead bodies of the the animals are thrown in the river water. That makes the water polluted.

Question 2.
What measure can be taken to prevent water pollution?
Answer:
The measure for preventing water pallution are :

1. The garbage should not throw out directly in the rivers, ponds or seas.
2. The sewage from factories should be thrown in the water after treatment.
3. Plastic, dead bodies, solid waste should not be thrown in the water bodies.
4. The excess use of fertiliser, pesticides insecticides in the farmland should be stopped. Instead of organic manure should be used.
5. The sewage of town of cities should be treated before throwing in the water.
6. The misuse of waste water should prevented.
7. We should not wash clothes or allow the cattles to get into the river and pond water.
8. The hot water of tharmal power station should be thrown in the river water after cooling.
9. Through the different bacteria and algae the pollution of floating mineral oil should be removed from the sea water.
10. We should be careful that the oil from ship could not spilt into the sea.
11. The stool-Urin medecinal waste of hospital should not be thrown in the water.

Question 3.
What can we do to prevent water pollution?
Answer:

1. We can prevent wasting water by stopping water tap when it is not needed.
2. We have to use such soap or shampoo which are not harmful for environment.
3. We have to throw the house hold garbage at such a place where the source of pure water is not present.
4. The vegetables, fruit, flower plants should be planted around the pond, well or beside the drainage of tube well.

Question 4.
What are the effects of water pollution in West Bengal.
Answer:
Arcenic has been found more or less many districts of West Bengal like Malda. Nadia, Hooghly, Howrah, Burdwan, North and South 24 parganas in the ground water. So the arsenie pollution is occuring. For that black wound is found in the palm and toe which is called black foot diseases. Besides anemea skin diseases lung and skin cancer have occured.

For fluride pollution the problem of teeth and bone is caused that leads to flurosis disseases. Besides for mercury pollution minamata diseases and for cadmium pollution itai-itai have occured.

As the set up of Haldia Petro chemical has caused the water pollution at the mouth of Haldi river. This leads to reducing the frequent visit of Hilsa fish at the mouth of Haldi river. The Cullivation of fish at wetlands of East Kolkata also has been reduced for the applying of insecticides. The store of ground water also decreased. As the result of drinking polluted water dyhrea. cholera, Typhoid are spreading rapidly.

Question 5.
What are the measures of purifying water?
Answer:

1. The bacterias of the water could be destroyed by boiling water at 100°C for 10 minutes.
2. Germfree water can be obtained by adding certain amount of chlorine with water.
3. Water should be covered and left for some hours. After that it will be found that the mud and sand have been sedimented at the bottom of water.
4. Water can be purified with the help of charcol, fine sand, pebbles and stones.
5. The masoor plants help to be sedimented of the dirt of water
6. Sametimes keeping in sunlight for long makes the water purified.

Question 6.
How water gets polluted from industriel source?
Answer:
Petro chemical industry, polythene and plastic industry, oil refineries, automobile industry, small and medium electrical and engineering industries, etc. generate huge quantities of wastes and effluents like ammonia, chlorine, phenol, cyanide as well as metals like zinc, mercury, lead and cadmium drain in to water bodies and pollute them.

Question 7.
How water gets polluted from industriel source?
Answer:
Households in villages and cities generate wastes like the peels and pieces of fruits and vegetables, kitchen wastes and excreta. Phenyl, soaps and detergents are also sources of water pollution. Medical wastes from hospitals and clinics, daily wastes generated from market places and wastes from cowsheds, stables and other domestic animal shelters also pollute water.

Question 8.
How water gets polluted due to air pollution?
Answer:
Exhaust fumes from factory-chimneys and vehicles emitting sulphur dioxide, oxides of Nitrogen, carbon dioxide etc. are absorbed in the air. Sulphur dioxide and Nitrogen dioxide react with rainwater to make the different waterbodies acidic.

Question 9.
How water gets polluted by Arsenic contamination?
Answer:
Excessive extraction of underground aquifer creates void that is filled by air. This air reacts with arsenic to form toxic metallic compounds that contaminate water which can seriously affect one’s health when used as drinking water. The presence of excessive Fluorine and Chlorine in water is also harmful for health and pollutes water.

Detailed explanations in West Bengal Board Class 7 History Book Solutions Chapter 1 The Idea of History offer valuable context and analysis.

WBBSE Class 7 History Chapter 1 Question Answer – The Idea of History

Very Short and short Questions & Answers :

Question 1.
What are the parameters of time in history?
Answer:
Date, month, year, century and millennium are important in history.

Question 2.
Which parameters of time are less important in history?
Answer:
Second, minute and hour are less important in history.

Question 3.
What is ‘History’?
Answer:
History is the study of human past as it is described in written documents left behind by humans.

Question 4.
Why is it important to study history?
Answer:
The study of history is important because it allows one to make more sense of the present world. One can look at past economic and cultural trends and be able to offer reasonable predictions of what will happen next in today’s world.

Question 5.
What are the sources of history?
Answer:
Old houses. temples and mosques, statues, coins, paintings, books and scripts are sources of history.

Question 6.
What are the types of sources of history?
Answer:
There are two main types of historical sources–

• Primary sources,
• Secondary Sources.

Question 7.
What is primary source of history?
Answer:
Sources contain firsthand knowledge of events and people and essential to a good research project is called primary sources.

Question 8.
What is secondary source of history?
Answer:
Secondary source is something that was not created first-hand by someone who participated in the historical era.

Question 9.
In how many parts history is divided?
Answer:
History is divided into three parts :

• ancient.
• medieval and
• modern age.

Question 10.
Why are coin important for the study of medieval period?
Answer:
Coin tells us about the reigning periods of kings and gives us dates of political events.
It also tells us about the economy of kingdom and trade with other regions.

Question 11.
Why are inscriptions important for the study of medieval period?
Answer:
Inscriptions are record of royal proclamation, religious instruction and gifts given by rulers. It tells us important events in king’s life. about the people of particular time and narrates the achievements of the king.

Question 12.
Who used the word ‘India’ first?
Answer:
The word India was first used by the Greek historian Herodotus..

Question 13.
How do historians devide the past into periods?
Answer:
The fistorians devide the past into periods on the basis of economic and social factors to characterise the maine elements of different moments of the past.

Question 14.
What was considered a ‘foreigner’ in the past?
Answer:
Any stranger who did not belong to a certain society or culture and was not a part of that particular village was regarded as a foreigner.

Question 15.
Mention some of the technological changes associated with medieval age in India. is
Answer:
Some technological changes are —

• Use of spinning wheel in weaving.
• Use of Persian wheel in irrigation.
• Use of fire arms in combat.

Question 16.
What were some of the major religious developments during medieval age?
Answer:
Some religious developments are–

• Worship of new deities.
• Increasing importance of Brahmans, the priests as dominant group of the society.
• The imergence of the idea of Bhakti among people.
• Appearance of many new religions like islam.

Question 17.
In what ways has the meaning of the term ‘Hinduthan’ changed over the centuries?
Answer:

• In the thirteenth century, the term ‘Hindusthan’ was used for the first time by Minhaj-i-Siraj, a Persian clironicler.
• During the fourteenth century, the term ‘Hind’ was used by Amir Khasru to refer to the culture and people of the Indus river.
• During the early sixteen century, Babar used the term ‘Hindusthan’ to describe the culture, geography and fauna of the inhabitants of the sub-continent.

Question 18.
What was significant changes in governance and politics?
Answer:
The rulers had to think not only of territorial expansion but also about the well-being of the subjects.

Question 19.
What was significant changes in economic sphere?
Answer:
There was agriculture on the one hand and commerce on the other hand. New towns were esablished. Forests were cleared to extend cultivation land.

Fill in the blanks : ( 1 mark for each question)

1. ‘Hindusthan’ was used to indicate the whole of ______
Answer:
India.

2. Inscriptions on copper plates are called _______
Answer:
Copper inscriptions.

3. Inscriptions on stone plaques are called _______
Answer:
Stone inscriptions

4. Those that are written on paper are called ________
Answer:
Paper materials.

5. People of India came to know of various food item and beverages in ______ period. it
Answer:
Medieval.

6. Different fields of art were _______ in medieval period.
Answer:
explored.

7. Historians look bits and pieces of _____
Answer:
evidence.

8. We do not know the names of the multitude of ______ and ______ who actually built the Taj Mahal.
Answer:
carftsmen, artisans.

9. People of medieval period discovered some new avenues in ______ thinking.
Answer:
religious

10. Historians have divided a long period of time by ______.
Answer:
age.

State whether True or False : ( 1 mark for each question)

1. In medieval period there was no development in any field.
Answer:
False

2. Hindustan was mentioned in Arabic and Persian sources.
Answer:
True

3. Many people use the word ‘desh’ to mean their native land.
Answer:
True

4. Calculation of stine of great value in history.
Answer:
False

5. Everyone likes of bygone days, if they are narrated like stories
Answer:
True.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 6 Rock and Soil offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 6 Question Answer – Rock and Soil

(Page no. 62)
Let’s get the job on hand done….

ORIGIN OF ROCKS	TYPES OF ROCK
1. By sedimentation	Sedimentary rock.
2. By accumulation of Lava	Igneous rock
3. By heat and pressure in the earth’s interior	Metamorphic rock

Charecteristics of RoCK	TIPES OF ROCK
1. Light and brittle	Sedimentary rock
2. Hard and resistant to erosion	Metamorphic rock.

(Page no. 64)

Class 7 Geography Chapter 6 Question Answer West Bengal Board – Rock and Soil

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
The rock that accumulates on the ocean floor is –
i) igneous rock
ii) sedimentary rock
iii) metamorphic rock
Answer:
ii) Sedimentary rock.

Question 2.
The rock that is used in making cement is –
i) mudstone
ii) sand stone
iii) lime stone
Answer:
iii) Lime stone.

Question 3.
Marbel is –
i) igneous rock
ii) sedimentary rock
ii) metamorphic rocks
Answer:
iii) Metamorphic rock.

Question 4.
Sedimentary rock is –
i) sand stone
ii) granite
iii) basalt
iv) marble
Answer:
i) Sand stone.

Question 5.
The stones that are used as building materials –
i) limestone
ii) sandstone
iii) mudstone
iv) sandstone and mudstone
Answer:
iv) sandstone and mudstone

Question 6.
The grains of sandy soil is –
i) fine
ii) medium
iii) coarse
Answer:
iii) coarse.

Question 7.
Loamy soil contains-
i) more sand, less clay
ii) equal sand and clay
iii) less sand, more clay
Answer:
ii) equal sand and clay

Question 8.
The animals help to loosen the soil-
i) ants
ii) moles
iii) earthworms
iv) all of these
Answer:
iv) all of these

Fill in the blanks : (1 mark for each question)

1. Granite is one type of ________.
Answer:
ignious rock

2. Tajmahal is made of __________.
Answer:
marbel

3. Soil forms faster in warm and rainy ___________.
Answer:
climates

4. Dead remains of organisms supply ___________ to a soil.
Answer:
nutrients

5. Sandstone, mudstone, limestone are examples of _________ rocks.
Answer:
sedimentary

6. Plants and animals form a very __________ part soil.
Answer: small

7. soil __________ is best suited for cultivation.
Answer:
Loamy

8. The hard outer shell of the earth is made of __________.
Answer:
rocks

9. ____________ soil has bigger grains and bigger spaces between the grains.
Answer:
sandy

10. Sandy soil absorbs ____________ in no time.
Answer:
water

11. The __________ soil is found at the bank of the river.
Answer:
alluvial

12. The ability of holding water is more is ___________ soil.
ins :
clayey

State whetherTrue or False : (1 mark for each question)

1. The earth was a ball of fire when it was born.
Answer:
true

2. Igneous rocks break down easily.
Answer:
false

3. Sandstone is used as raw material in cement.
Answer:
false

4. Metamorphic rocks are hardy and resistant to errosion.
Answer:
true

5. Heat from the sun, rain drop, wind, river water etc break down the rocks.
Answer:
true

6. Soil formation is influenced by several factors.
Answer:
true

7. Soil is classified on the basis of their taste.
Answer:
false

8. Basalt is the example of sedimentary rock.
Answer:
false

9. Sedimentary rocks are soft and brittle.
Answer:
true

Match the following : (1 mark for each question)

Match column A with column B.

A	B
a) Igneous rock is	i) soft and brittle
b) Granite and Basalt are	ii) warm and rainy climates
c) Limestone is used	iii) supply nutrients to soil
d) Sedientary rock is	iv) example of igneons rock
e) Metamorphic rock is	v) very hard
f) Soil forms faster in	vi) equal sand and clay
g) Dead remains of organisms	vii) resistant to erosion
h) Loamy soil contains	viii) in cement

Answer:
a) Igneous rock is very hard.
b) Granite and Basalt are example of igneous rock.
c) Limestone is used in cement.
d) Sedientary rock is soft and brittle.
e) Metamorphic rock is resistant to erosion.
f) Soil forms faster in warm and rainy climates.
g) Dead remains of organisms supply nutrients to soil.
h) Loamy soil contains equal sand and clay.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
What type of rocks are those which lie on the railway track?
Answer:
The rocks on the railway track are igneous rock.

Question 2.
Which rock can resist erosion?
Answer:
Metamorphic rock can resist erosion.

Question 3.
Which rocks are used as housebuilding materials?
Answer:
Sandstone and mudstone are used as house building materials.

Question 4.
Which soil is suitable for agriculture?
Answer:
Loamy soil is suitable for agriculture.

Question 5.
What do the rocks transform into after erosion?
Answer:
After erosion the rocks transform into soil.

Question 6.
Which soil can not hold water?
Answer:
Sandy soil can not hold water.

Question 7.
Which soil is used for making idol?
Answer:
Clayey soil is used for making idoal.

Question 8.
What is the Earth’s surface?
Answer:
The outmost level of the land or sea is known as the Earth’s surface.

Question 9.
What are rocks?
Answer:
Rocks are the compound of minerals which form the Earth’s surface.

Question 10.
How are the rocks classified?
Answer:
Rocks are classified into three groups- igneous, sedimentary and metamorphic.

Question 11.
What is soil?
Answer:
The smooth and loose upper most rock layer of the earth’s surface is called soil.

Question 12.
How is the soil classified?
Answer:
The soil is classified into three group-sanday, clayey and loamy.

Short Questions & Answers : (2 marks for each question)

Question 1.
What is igneous rock?
Answer:
The hot molten magma of earth chamber when comes out through an openings of the earth surface and forms hard rocks by cooling down in contact with cool air. This is called ignious rock.

Question 2.
What is sedimentary rock?
Answer:
Different types of rocks are weathered by some natural forces and accumulate on the ocean flore. In due course of time due to the pressure of upper layer of the rocks and the heat of the earth core the sediment turn into rocks. This is called sedimentary rock.

Question 3.
What is metamorphic rock.
Answer:
When the igneous and sedimentary rocks due to the action of different natural forces like river wind, glacier etc, converted into a new type of rocks, this is called metamorfic rock. Example—marbel.

Question 4.
What is fossils.
Answer:
When an animal body is stored with the sediment and burried under the layer of sediment, in due course of time it solidifies and turn into rock. This animal body leaves mark on the rock. this is called fossil.

Long Questions & Answers : (3 marks for each question)

Question 1.
Write the features of igneous rocks.
Answer:

1. As the molten material solidify to form the ignec’is rocks, it is crystalized
2. It has no layer.
3. This types of rock does not break easily, it is comperatively hard.
4. The fossil can not be found in this rock.

Question 2.
Write the features of the sedimentary rock.
Answer:

1. It has layers.
2. It is soft and light.
3. Sedimentary rock erodes easily,
4. Fossils are found in this rock,
5. This type of rock is not crystalized.

Question 3.
Write the charatersites of metamorphic rock.
Answer:

1. This rock is crystalized,
2. When the sedimentary rock turns into metamorphic rock, it becomes hard.
3. Fossils are not found when sedimentary rocks change into metamorphic.
4. The minerals of metamorphic rocks are accumulated in one side.

Question 4.
What is rock cycle?
Answer:
The rock cycle is the process by which rocks of one kind change into rocks of another kind. There are three main kinds of rocks: igneous rock, metamorphic rock and sedinientary rock. Each of these rocks can change in to the other kinds by physical process : cooling. melting, heating, weathering. compacting, cementing and pressure.

Question 5.
Write the different use of alluvial soil.
Answer:
a) Alluvial soil is suitable for agriculture.
b) It is used for making idol.
c) The potter uses the soil for making pots.
d) It is used for making hut.

Question 6.
State the characteristics lies of different soils.
Answer:
Sandy soil : i) The grains of this soil are large. 2) It can not hold more water. 3) Air can passes through this soil. 4) It is not fertile. 5) It is not fit for agriculture.
Clayey soil : i) The grains of the soil is very fine. ii) The capasity of holding air is more. iii) Air can not pass through this soil easily. iv) It can not be broken easily if it becomes dry. v) Dust clayey soil is like powder.
Loamy soil : i) It is fit for agriculter. ii) The grains of the soil is medium. iii) The ability of holding water is medium. iv) The ablity of passing air is medium.

Question 7.
Classify the igneous rock according to their origin.
Answer:
According to their origin ignious rocks are of two types-i) Intrusive rock, ii) Extrusive rock. Intrusive rock is further divided into two types : a) Plutonie rock, b) hypabyssal rock.

When the hot molten lava of earth chamber can not reach on the earth’s surface it cools down in the earth’s chamber for many years and solidifies. This is called intrusive rock.

In the earth chamber when the magma cools down and solidifies to form a rock it is called plutonic rock. On the other hand when the magma cools down and solidifies in the crack before reaching the earth surface, this is called hypobyssal rock. Granite is the example of hypobyssal.

When the magma comes out through the crater of the volcano at the time of volcanic erruption, it cools down and solidify in contact of coal air then it is called extrusive rock. Basalt is the example of extrusive rock.

Question 8.
What are the differences between igneous rock and sedimentry rock.
Answer:
a) Fossils can not be found in igneous rock. Fossils are found in sedimentary rocks.
b) Igneous is the rock of primery stage. Sedimentary rock is the rock of second stage.
c) Igneous rock is formed either on earth’s surface or in the earth’ chamber and sedimentary rock is formed under the ocean.
d) Ignious rock is crystalized but sedimentary rock is not crystalized.
e) There is no layer in igneous rock but layers are found in sedimentary rocks.
f) lgneous rock is hard but sedimentary rock is less hard

Question 9.
Why is fossil found in sedimentary rocks?
Answer:
Fossil is found in sedimentary rocks because sedimentary rock is formed under the sea or lake by accumulating sediment layer by layer. then the dead body of marine plants or animals are burried at the time of accumulating sediment and solidifies to form rock. After that the mark of their bodies are left in rock layers. So the fossils are found in sedimentary rocks. As the formation of the sedimentary rocks is a long process, in the long past the fossils of the animals that appeared in different ages can be found in the sedimentary rocks and it helps us to gain knowledge about the ancient plants and animals or the climate of that ages.

Additional Questions and answers :

Question 1.
Mention the factors of formation of soil.
Answer:
Rocks: The characteristics of a soil depend on the nature of rock(s) from which it is derived. However, soil formation is also influenced by several other factors.

Climate : Climate plays a very significant role in the formation of soil. Soil forms faster in warm and rainy climates and takes a lot of time to form in cool and dry climates. So, deeper soils are generally found in warm and humid regions.

Relief: the relief of the land influences the processes of formation of soil. Soil is unlikely to form on steep slopes. Gentler slopes support better and gradual development of soil.

Organic matter : plants and animals, alive or dead, form a very small part of soil, but are very significant. Ants, moles, earthworms and snakes loosen the soil and let air and water enter in to it. Dead remains of organisms supply nutrients to a soil.

Time : Soil does not form in a day. The natural process of soil formation may span through thousands, and sometimes, even millions of year.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 5 River offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 5 Question Answer – River

Verify and say…(Page no. 52)

Where do you find water flowing faster?
i) On a flst surface
ii) On a slope
Answer:
ii) On a slope

When does water flow faster on slopes?
i) When the volume of water is more
ii) When the volume of water is less
Answer:
i) When the volume of water is more

Think and write down (Page no. 53)

Fill it up correctly (Page no. 57)

You can fill this up from the village (Page no. 59)

Benefits derived from a river	Their influence on our lives
Water	drinking water, bathing, industry
Alluvium, Plains	Cultivation, urbanisation, prosperity of civilizations
Flood plains, agricultural land	agriculture, animal husbandry
Irrigation	production of crops, vegetables, fruits
Hydro electricity	agriculture, industry, daily use
Fish and aquatic life in river	fishery, food
Transportation	trade & commerce, transport
Tourism, amusement, environment, ecological balance	River water and sediments as habitat to plants, animals and microbes; replenishment of the underground water table

Look for the words (Page no. 59)

Clue
Where a river meets the sea–Estaury
River in which water flows throughout the year–Perennial
River originating from a main river–Distributary
A highland that makes rainwater runoff to different sides to form rivers flowing in different directions–Water shed
Deep cut river valley in a dry region–Cannyan
River water falls from a height along a slope to form a …–Waterfall
Alluvium is deposited along both banks of a river during flood to form…–Flood plain

Class 7 Geography Chapter 5 Question Answer West Bengal Board – River

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
The river Ganga is from Gomukh to Haridwar in-
i) upper course
ii) middle course
iii) lower course
Answer:
i) upper course

Question 2.
In the upper course, the river mainly-
i) deposits
ii) erodes
iii) transports its load
Answer:
ii) erodes

Question 3.
In the lower course, the river mainly-
i) deposits
ii) erodes
iii) transports its load
Answer:
i) deposits

Question 4.
In upper course the river forms-
i) meander
ii) waterfalls
iii) island
iv) ox-bow lake
Answer:
ii) Waterfalls.

Question 5.
The landform that creates in the middle course of the river is-
i) waterfall
ii) flood plain
iii) canyon
iv) ox-bow lake
Answer:
iv) Oxbow lake.

Question 6.
In the upper cource of a river it is-
i) calm
ii) exhausted
iii) restless
iv) gentle
Answer:
iii) restless

Question 7.
The river that gets water through out year is called-
i) perennial
ii) non perennial
iii) inland
Answer:
i) Perernnial.

Question 8.
The middle course of ganga is-
i) from Gomukh to Haridwar
ii) from Mithipur to mouth of the river
iii) from Haridwar to Mithipur
Ans.
iii) from Haridwar to Mithipur

Question 9.
Egyptian Sivilization thrived on the bank of river-
i) Indus
ii) Hwang Ho
iii) Nile
iv) Euphrates
Answer:
iii) Nile

Question 10.
The rivers have affected the growth of-
i) agriculture
ii) industry
iii) urbanisation
iv) all these
Answer:
iv) all these

Question 11.
The Jog fallsin the Western Ghats of India is-
i) 260 m high
ii) 360 m high
iii) 350 m high
iv) 250 m high
Answer:
i) 260 m high

Question 12.
The length of Amazon river is –
i) 6000 km
ii) 6200 km
iii) 6300 km
iv) 6400 km
Answer:
iv) 6400 km

Question 13.
The length of Mississippi river of North America is-
i) 3700 km
ii) 3730 km
iii) 3500 km
iv) 3600 km
Answer:
ii) 3730 km

Fill in the blanks : (1 mark for each question)

1. An Ideal river is ____.
Answer:
Ganga.

2. Taking a winding path of the river is called ____.
Answer:
meander.

3. In ____course of the river canyon is formed.
Answer:
upper.

4. The mouth of the river Ganga is ____.
Answer:
Bay of Bengal.

5. The longest river in the world is the ____.
Answer:
Nile.

6. When a small stream falls in the main river is called ____.
Answer:
tributary.

7. The area drained by a river from source to mouth is called ____.
Answer:
river valley.

8. An inland river of India is ____.
Answer:
Luni.

9. The area lying between the two rivers is called ____.
Answer:
Doab.

10. The deep valley in dry region is called ____.
Answer:
canyon.

11. The length of the river Amazon in South America is ____.
Answer:
6,400 km

12. The length of the river Murray Darling in Oceania is ____.
Answer:
3,375 km

13. Ganga originates from ____ in Gangotri glacier.
Answer:
Gomukh

14. ____ in Asia is an International river.
Answer:
Brahmaputra

15. ____ are shown by black lines on maps.
Answer:
Non-perennial rivers

State whether True or False : (1 mark for each question)

1. The energy of a river is high in the mountains.
Answer:
true

2. Grand Canyon of Colorado is situated in USA.
Answer:
true

3. Deposition is the main work of a river in the middle course.
Answer:
false

4. The length of Missouri is 3,710km.
Answer:
false

5. Perennial rivers do not dry up during any time of the year.
Answer:
true

6. Middle course of a river is compared with an old man.
Answer:
false

7. Main work of a river in the middle course is to travsport ane deposit.
Answer:
true

8. In upper course, the river valley does not become very broad.
Answer:
true

9. Meanders are formed in the middle course of a river.
Answer:
true

10. Every river can form delta at its mouth.
Answer:
false

11. In lower course of Hwavg-Ho river has Flood plains.
Answer:
true

12. There is less erosion in the upper course of a river.
Answer:
false

Match the following : (1 mark for each question)

a) Match the column A with column B.

Column A	Column B
a) The river in its upper course	i) is 260 m high
b) The river in its lower course	ii) 6650 km
c) Grand Canyon of Colorado	iii) its power is reduced
d) Jog falls in the Western ghat	iv) mainly deposits
e) The length of Nile is	v) on the banks of rivers
f) The area between two river-beds	vi) mainly erodes
g) Near its source a river has	vii) end at its sonfluence
h) A river deposits more when	viii) is a famous canyon
i) The course of a river cpmes to an	ix) is called Doab
j) Earliest civilizations thrived	x) great speed and energy

Answer:
a) The river in its upper course mainly erodes.
b) The river in its lower course mainly deposits.
c) Grand Camyon of Colorado is a famous canyon.
d) Jog falls in the Western ghat is 260 m high.
e) The length of Nile is is 6650 km.
f) The area between two river-beds is called Doab.
g) Near its source a river has great speed and energy.
h) A river deposits more when its power is reduced.
i) The course of a river comes to an end at its confluence.
j) Earliest civilizations thrived on the banks of rivers.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
What is river?
Answer:
When a stream of water originates from a source and flows from higher region to lower region according to the slope of the land is called river.

Question 2.
What is the source of a river?
Answer:
The place from where the river originates is called the source of the river.

Question 3.
What is the unit of the measuring river water?
Answer:
The unit of measuring river water is cusek.

Question 4.
In which course of the river meander is formed?
Answer:
Meander is formed in the middle course of a river.

Question 5.
In which course of the river flood plain is formed?
Answer:
Flood plain is formed in the lower course of a river.

Question 6.
In which course of the river waterfall is formed?
Answer:
waterfall is formed in the upper course of a river.

Question 7.
In which course of the river ox-bow lake is formed?
Answer:
Ox-bow lake is formed in the middle course of a river:

Question 8.
In which course of the river canyon is formed?
Answer:
Canyon is formed in the upper course of a river.

Question 9.
In which course of the river river island is formed?
Answer:
River island is formed in the niddle course of a river.

Question 10.
In which course of the river delta is formed?
Answer:
Delta is formed in the lower course of a river.

Question 11.
What is the main function of a river in upper course?
Answer:
Erosion is the main function in the upper course of a river.

Question 12.
What is the main function of a river in middle course?
Answer:
The main function of a river in the middle course of a river is to transport and deposit.

Question 13.
What is the main function of a river in lower course?
Answer:
Deposition is the main function of a river in lower course of a river.

Question 14.
Mention the upper course of Ganga.
Answer:
The upper course of Ganga is from Gomukh to Haridwar.

Question 15.
Mention the middle course of Ganga.
Answer:
The middle course of Ganga is from Haridwar to Mithipur in murshidabad.

Question 16.
Mention the lower course of Ganga.
Answer:
The lower course of Ganga is from Mithipur in murshidabad to the mouth of the river in Bay of Bengal.

Question 17.
In which course of the river canyon is formed?
Answer:
Canyon is formed in the upper course of a river.

Question 18.
What are the two main distributaries of the river Ganga?
Answer:
The main two distributaries of the river ganga is Bhagirathi and Padma.

Question 19.
What is the meaning of the word ‘Doab’?
Answer:
‘Do’ means two and ‘ab’ means water/river.

Question 20.
What is the largest delta of the world?
Answer:
The largest delta of the world is the delta of the river Ganga.

Question 21.
What is river valley?
Answer:
The area through which the river and its tributaries flow is called river valley.

Question 22.
What is water shed?
Answer:
The land that separates the two or more than two rivers flowing side by side is called the water shed.

Question 23.
What is an ideal river?
Answer:
The river in which the three courses upper, middle and lower course are found is called the ideal river.

Question 24.
On which factors the force of the river depends?
Answer:
The force of the river depends on the slope of the valley, the nature of the rocks. the shape and the weight of the load etc.

Short Questions & Answers : (2 marks for each question)

Question 1.
What is international river? Give examples.
Answer:
The river that flows through more than one countries is called international river. Brahmaputra in Asia, Rhine and Danube in Europe are two examples of international river.

Question 2.
What is inland river? Give examples.
Answer:
A river emptying itself into an inland lake or any other inland water body is called an inland river. Luni in India and Amur in Russia are examples of inland river.

Question 3.
What is tributary? Give examples.
Answer:
A stream originating from any source and emptying itself into a larger river is called a tributary. Yamuna, Gandak, Gharghara are all tributaries of the Ganga.

Question 4.
What is George and Cannyon?
Answer:
In the mountain region if the rever valley is very narrow and deep like ‘I’ or ‘V’ shaped, then it is called george. When the George is in dry ares it is called Canyon.

Question 5.
How is waterfall formed?
Answer:
In the upper course of the river if hard and soft -rocks are arranged in alternate layers. the softer layers get eroded faster and step-like features are formed. Now the the water now plunges down these steep-sided and form waterfalls.

Question 6.
What is Estuary?
Answer:
At the meeting point of the river and sea the river valley becomes wide. At the time of high tide the saline water of see enters the river through its mouth and form estuary by widen the mouth. Muddy water is found is the mouth of the river and the river vaitey becomes wide.

Question 7.
What is flood plain? Give examples.
Answer:
In the lower course of a river the flood waters leave sediments in the extensive plain lands on both banks of the river, thereby form flood plain. The lower course of the \mathrm{Hv How has flood plains.

Question 8.
What is perennial river?
Answer:
The streams with their sources high up in the mountains are generally fed by ice-melt water. The channels do not dry up during any time of the year. Such type of river is called perennial river.

Question 9.
What is non-perennial river?
Answer:
There are some rivers which are filled with water during rainy season. During other parts of the year their channels tend to dry up. They are called non-perennial rivers.

Long Questions & Answers : (3 marks for each question)

Question 1.
Why is ‘V’ shaped valley formed in the upper course of the river?
Answer:
In t e upper course of the river the velocity of the water is high and so the water break the pelbbles and boulders into small pieces and are transported by the water. These pebbles and boulders struck the river bed. So lower cut is more than the side cut. Therefore the V shaped valley is formed in the upper course of the river.

Question 2.
Why is the delta not found in all river.
Answer:
The deposition is much in the lower course of the river. The eroded silt, mud, pebbles. sands brought by the river accumulate at the mouth of the river to form delta. Sometimes in many rivers the lower course could not be found or the amount of the load may be less. Besides if the water current is more the delta could not be formed.

Question 3.
What are the different functions of the river?
Answer:
The function of the rivers are of three types-i) Erotion, ii) Transportation and iii) deposition.

1. Erosion : The river struck the side rocks by the water current in upper course.
2. Transportation : The eroded rock particles are transported by the river water.
3. Deposition : The eroded rock particles are accumulated at the river bed and the mouth of the river in the lower course. This is called deposition.

Question 4.
Compare the function of the river in different courses.
Answer:

Question 5.
What are the different landforms created in the upper course of the river?
Answer:
The different landfroms created in the upper course :
i) Narrow ‘V’ shsped Valley : In upper course the lower cut of the river is more than side cut. Thus the ‘V’ shaped valley formed. This type of valley when becomes more deep it is called George. But in the desert area with limestone the upper cut is only occured, thus the river valley is ‘I’ shaped here. This is called Cannyon.

ii) Water fall : In the upper course of the river if the hard and soft rock bed lie horizontally, the soft rock erodes faster then hard rock and the hard rock forms step like structure and river water falls from higher to laower slope which is known as waterfalls. Sometimes water falls occurs in the upper course due to fault.

iii) Pot hole : when the boulders or rocks are carried by the river water they may strike the river bed and create holes. These are called poese holes.

Question 6.
What are the different land forms created in lower course.
Answer:
Old age of the river found after the middle course. This is called lower course. This is called main river valley. The main function of the river in lower course is deposition. The landform created by deposition are-i) delta, ii) flod plain.

i) Delta : When the river falls in the sea or lake it stops flowing and can not go any more in the sea. Thus the silt accumulae in the sea bed. The sedimentation is more in saline water. Years after years the accumulation of silt forms delta at the mouth of the river. The landform is triangular shaped or greek ‘Δ’ shape. The silt accumulaes at the river bed day by day and the delta increases towards the sea and the sea goes away from the land. For this reason the mouth of the river graduaily expands.

ii) Flood plain : The accumulation of sediments on the river bed makes it shallow. So the river overflows its banks during the rainy season. The flood waters leave behind cediments in the existensive plain lands on both banks of the river and form flood plains.

Question 7.
What are the different process of erosion?
Answer:
The different process of erosion are-i) abration, ii) attrition, iii) Corrosion, iv) Hydrolic action.

1. Abrasion : The rocks, pebbles. brought by the river, erode the river bed. This type of erosion is called abrasion which creats potholes in the river bed.
2. Attrition : The pieces of rocks. brought by the river, gradually become smaller by striking each other at last turn into sand. This is called attrition. For this the pebbles become round shaped.
3. Corrosion or solution : In the course of the river sometimes minerals present in the rocks in some places. Which desolve in the water and becomes eroded. This is erorsion by solution. This type of erosion is found in limestone area.
4. Hydrodlic action : When the river water flows violently, it strikes the two sides of the river valley. For this reason the comperatively soft rocks gradually erode. This type of erosion makes the river valley.

Question 8.
What are the different landforms created in the middle course of the river due to the deposition.
Answer:
The slope of the river decreases in the middle course of the river. Eroded materials are accumulated at the both side of the river bank and in the river bed.

i) Meander : In the middle course the velocity of the river water decreases and the river flows slowly. In this situation the river meanders when it gets obstructed. This is called meander. Meanders are found it the river Ganga near Baranasi.

ii) Sand bars, River Islands : In the middle course of a river its capacity to carry eroded materials is also reduced. Its starts depositing the transported pebbles, sand and silt on its bed and along the banks. This deposits may choke the channel and form sand bars, or sometimes, river islands.

iii) Ox-bow lake : The more a river meanders, or the more volume of water flows through it, the loop of the meander can get seperated from the main channel by reverine deposits. This seperated part generally has the shape of a horse-shoe and is called an ox-bow lake.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 4 Landforms offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 4 Question Answer – Landforms

Match the following (Page no. 40) 

1. Etna	Fold Mountain
2. Alps	Igneous Mountain
3. Black Forest	Fold Mountain Forest
4. Himalaya	Black Mountain

Answer:

1. Etna	Igneous Mountain
2. Alps	Fold Mountain
3. Black Forest	Black Mountain
4. Himalaya	Fold Mountain

Brainware-Solve it if you grasp it. (Page no. 42)

Answer:
Mountain

1. Height-More than 900 m
2. Charecteristics-For extended rocky mass with steep slope.
3. Charecteristics-Conical narrow upper portion known as peak.
4. Types-Fold Mountain, volcanic Mountain, Black Mountain.

Plateau

1. Height-300-600 m
2. Highest plateau-Pamir plateau
3. Charecteristics-Land with steep slope at its side with plat or undulating top.
4. Example : Pamir plateau, Tibetian plateau, Indian Chotanagpur plateau.

Plain :

1. Charecteristcs-Almost Flat land.
2. Type-Alluvial plain, Lava plain, Loess plain.
3. Example : Ganga-Brahmaputra plain, Loess plain of China, Hwong-Ho plain.

Effect of of Landforms on Human life- (Page no. 45)

a) Mountain Region :

Question 1.
What can be the main livelihood?
Answer:
Animal Husbandary, Lumbering Industry, Tourism.

Question 2.
What should be the transport system?
Answer:
Bad.

Question 3.
How are settlement and density of population likely to be?
Answer:
Low

Question 4.
How is the economic development likely to be?
Answer:
Low.

Question 5.
Lifestyle?
Answer:
Very Tough.

B. Plateau Region :

Question 1.
What can be the main livelihood?
Answer:
Industry and mining.

Question 2.
What should be the transport system?
Answer:
Medium.

Question 3.
How are settlement and density of population likely to be?
Answer:
Medium.

Question 4.
How is the economic development likely to be?
Answer:
Medium

Question 5.
Lifestyle?
Answer:
Very Tough

C. Plain Region :

Question 1.
What can be the main livelihood?
Answer:
Agriculture, Entertainment Industry, Animal husbandry.

Question 2.
What should be the transport system?
Answer:
Very good.

Question 3.
How are settlement and density of population likely to be?
Answer:
Very high.

Question 4.
How is the economic development likely to be?
Answer:
High.

Question 5.
Lifestyle?
Answer:
Medium.

Crossword :

Across
1. Landforms exceeding1000 m in height.
6. A famous hill station in South India.
7. A volcano in Sicily.

Up-Down
2. Fold Mountain in North America.
3. Block mountain in India.
4. Intermontane plateau between Himalayas and Kunlun.
5. Darjeeling is a famous spot

Class 7 Geography Chapter 4 Question Answer West Bengal Board – Landforms

Multiple Choice Questions & Answers : (1 mark for each question)

Question 1.
An endogentic force is –
i) sea waves
ii) radiation from the sun
iii) earth movement
Answer:
iii) earth movement

Question 2.
An old fold meantain of India is –
i) himalay
ii) Araballi
iii) Satpura
Answer:
ii) Araballi

Question 3.
According to the mode of origin mountains are of –
i) two types
ii) four types
iii) five types
iv) three types
Answer:
iv) three types

Question 4.
The hight of Mt. Everest is –
i) 8840 m
ii) 8844 m
iii) 8848 m
iv) 4488 m
Answer:
iii) 8848 m

Question 5.
Fold is responsible for formation of –
i) block mountain
ii) fold mountain
iii) volcanic mountain
Answer:
i) block mountain

Question 6.
The largest plateau of the world is –
i) Colorado plateau
ii) Anatolian Plateau
iii) Tibetan Plateau
iv) Decan plateau
Answer:
iii) Tibet Plateau.

Question 7.
River based civilizations are formed at –
i) mountain region
ii) plateau region
iii) plain region
Answer:
iii) Plain region

Question 8.
Decan plateau is best example of –
i) lava
ii) continental
iii) piedmont
iv) intermontane
Answer:
i) lava.

Question 9.
Generally a plateau is –
i) 250 m high
ii) above300 m high
iii) below300 m high
iii)200 m high
Answer:
ii) above300 m high

Question 10.
Many mountain ranges converging at a place forms a –
i) peak
ii) valley
iii) mountain range
iv) mountain knot
Answer:
iv) mountain knot

Question 11.
Visuvius is situated in-
i) Africa
ii) Japan
iii) Italy
iv) Indonesia
Answer:
iii) Italy

Question 12.
Mountains are generally higher than –
i) 300 m
ii) 900 m
iii) 600 m
iv) 700 m
Answer:
ii) 900 m

Question 13.
A famous plain land of Asia-
i) Gangetic Plains
ii) Pampas
iii) Prairries
iii) plains of Nile
Answer:
i) Gangetic Plains

Question 14.
Satpura in India is a-
i) Volcanic mountain
ii) Fold mountain
iii) Block mountain
Answer:
iii) Block mountain

Question 15.
Most plateaus are very rich in –
i) agriculture
ii) industry
iii) tourism
iv) minerals

Question 16.
Pampas is situated in –
i) North America
ii) South America
iii) Africa
iv) Asia
Answer:
ii) South America

Question 17.
A contintinental plateau-
i) Greenland
ii) Malwa
iii) Chhotanagpur
iv) Tibet
Answer:
i) Greenland

Fill in the blanks : (1 mark for each question)

1. The diversity of earth’s surface is called ________.
Answer:
Landfrom

2. Glacier is the Earth’s ________.
Answer:
exogentic

3. The highest peak of the world is ________.
Answer:
Mt. Everest

4. Lowland between two high ridges is called ________.
Answer:
vally.

5. The plateau is called ________.
Answer:
table land.

6. A plain of south America is ________.
Answer:
Pompus.

7. The Chhotanagpur plateau is a ________.
Answer:
dissected Plateau.

8. The forest of ________ wood is found in mountain region.
Answer:
soft.

9. ________ plateau is best example of Volcanic Plateau.
Answer:
Decan.

10. ________ is North America one the world’s largest alluvial plain.
Answer:
Prairie

11. The world’s highest inter moutain plateau is situated in between Himalaya and ________ mountain.
Answer:
Kuniti:.

12. When Mountain peaks and valleys extended laterrally is called Mountain ________.
Answer:
chain.

13. When a few mountain chains meet in a highland is called Mountain ________.
Answer:
knot.

14. The top of a plateau may be flat or ________.
Answer:
undulating.

15. Forces from the earth’s ________ as well as those from outside can shape various types of plains.
Answer:
interior.

State whether True or False : (1 mark for each question)

1. Lava plains can be seen in iceland.
Answer:
true

2. A plateau is also called a table land.
Answer:
true

3. The hight of pamir plateau is 3973 m.
Answer:
false

4. Nile in North America is a famous plain.
Answer:
false

5. About one-fourth of the landmass on earth is mountain.
Answer:
true

6. Vesuvias in Italy is a volcanic mountain.
Answer:
true

7. Vosges in Italy is a voicanic mountain.
Answer:
false

8. Alps in Europe is a fold mountain.
Answer:
true

9. The surface of the earth is not similar everywhere.
Answer:
true

10. The highest parts of the earth’s surface are plains.
Answer:
false

11. The interior of the earth always undergoes movements.
Answer:
true

12. Rivers, winds, glaciers and sea waves are sndogenic process.
Answer:
false

13. The narrow, pointed summits of the mountains are salled peaks.
Answer:
true

14. Most of the plains in the world have been formed by the deposition of alluvium.
Answer:
true

Match the column A with column B.

Column A	Column B
a) Prairries in North America—	i) an alluvial plains
b) The Tibet plateau is	ii) a table land
c) The Chhotanagpur plateau is	iii) mountainous tourist spot
d) Pamir plateau is known as	iv) one of the famous plains of the world
e) Indo-Ganga-Brahmaputra plains is	v) $3655 \mathrm{~m}$ high
f) Antertica is a	vi) lava plateau
g) P’ateau is also called	vii) a dissected plateau
h) Decan plateau is a	viii) grow in the mountains
i) Darjeeling is a famous	ix) ‘Roof of the world’
j) Forests of valuable soft wood trees	x) continental plateau

Answer:
a) Prairries in North America-one of the famous plains of the world.
b) The Tibet plateau is3655 m high.
c) The Chhotanagpur plateau is a dissected plateau.
d) Pamir plateau is known as ‘Roof of the world’.
e) Indo-Ganga-Brahmaputra plains is an alluvial plains.
f) Antertica is a continental plateau.
g) Plateau is also called a table land.
h) Decan plateau is a lava plateau.
i) Darjeeling is a famous mountainous tourist spot.
j) Forests of valuable soft wood trees grow in the mountains.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
What is landform?
Answer:
The diversity of land is called landform.

Question 2.
What are the different forces that are responsib ce for creation of landform.
Answer:
The two different forces that are responsible for creation of landform are endogentic foree and exogenatic force.

Question 3.
What is the heighest plateau of the world?
Answer:
The heighest plateau of the world is Pamir plateau.

Question 4.
What is mountain?
Answer:
Mountain is expansive, rocky landform that is generally higher than 900 m.

Question 5.
Name a young fold mountain of India.
Answer:
A young fold mountain of India is Himalaya.

Question 6.
What is Mountain Knot?
Answer:
When a few mountains chains meet in a highland is called mountain knot.

Question 7.
What are peaks?
Answer:
The narrow, pointed summits of the mountains are called peaks.

Question 8.
What are Mountain Range?
Answer:
Numerous vaiieys and peaks located over a vast stretch forms a mountain range.

Question 9.
What is valley?
Answer:
Lowland between two high ridges is called valley.

Question 10.
What are the different types of mountain according to their origin?
Answer:
According to their origin mountains are of three types-fold mountain, block mountain and volcanic mountain.

Question 11.
What is volcanic mountain?
Answer:
At the time of volcanoic erruption the ash, lava boulders come out and formed the mount{ }^{-in which is called volcanoic mountain.

Question 12.
What is mountain Chain?
Answer:
Wlren mountain peaks and valleys extended laterally is called mountain Chain.

Question 13.
What is plateau?
Answer:
A landform that suddenly rises over its surroundings with steep slopes on all sides, ge ierally over300 m high, is called a plateau.

Question 14.
Why is peateau called ‘Table land’?
Answer:
The top of the plateau is almost flat and table like. So It is called ‘Table land.’

Question 15.
What is the highest plateau of India.
Answer:
The highest plateau of India is Ladak Plateau.

Question 16.
What is Lava plalteau”?
Answer:
At the time of volcaoic erruption lava comes out and forms plateau which is called lava plateau.

Question 17.
What is Intermontane plateau?
Answer:
The p!ateau which is surrounded by the mountains is called intermontane pleteau.

Question 18.
What is What is the world’s highest plateau?
Answer:
Pamir Plateau is the highest plateau of the world.

Question 19.
What is plane?
Answer:
A plain is a low, flat stretch of land.

Question 20.
How lava plains are created?
Answer:
Lava plains are formed when lava accumulates over vast, flat, low lying stretches.

Question 21.
Give two examples of fold mountains.
Answer:
Himalayas in Asia and Andes in South America are two fold mountains.

Question 22.
Give two examples of block mountains.
Answer:
Satpura in India and Black Forest in Germany are two block mountains.

Question 23.
Give two examples of volcanic mountains.
Answer:
Vesuvias in Italy and Fujiyama in Japan are two volcanic mountains.

Question 24.
Give an example of dissected plateaus.
Answer:
Chhotanagpur plateau is a dissected plateati.

Question 25.
Give two examples of continental plateaus.
Answer:
Antarctica and Greenland are two continental plateaus.

Question 26.
What kind of plateau is Chhotanagpur plateau?
Answer:
Chhotanagpur plateau is a dissected plateau.

Question 27.
Name two famous plains of the world.
Answer:
Gangetic plains of Asia and Pampas of South America are two famous plains of the world.

Question 28.
What is the other name of lava plateau?
Answer:
Lava Plateau is also known as volcanic plateau.

Short Questions & Answers : (2 marks for each question)

Question 1.
What is endogenetic and exogenetic force?
Answer:
The force that generates in the interior of the Earth is known as endogenetic force.
Example: Earth movement force.
The outer force of the Earth’s surface is known as exogenetic force.
Example: river, wind, glacier etc.

Question 2.
What is mountain? What is mountain peak?
Answer:
Very high (900 m and above) and very extensive land mass is called mountain. Example: Himalaya

Question 3.
The conical narrow upper portion of the mountain is called peak. Example: Mount Everest. 3. What is fold mountain.
Answer:
The mountain that is formed by the pressure of the plates of two sides to the layer of the silt accumulated under the sea is called fold mountain. Example: The Himalaya of India. Andes of South America and Rocky in North America.

Question 4.
What is Block mountain?
Answer:
Cracks are created due to the earth’s movement. The middle portion of the cracks sometimes uplifts or goes down creating mountain which is called Block mountain.
Example: Satpura in India, Vosges in France and Black forest in Germany etc.

Long Questions & Answers : (3 marks for each question)

Question 1.
How are fold mountains created? Give an example.
Answer:
Fold mountains are created when two plates move together. This can be where two continental plates move towards each other or a continental and an oceanic plate. The movement of the two plates forces sedimentary rocks upwards into a series of folds.

Example: At the place of the Himalaya Mountain there was a geosyncline almost 10 crore years ago. The name of the land to its north was Angara land and to the south was gondowana land. For many years the silt, brought by the rivers of these two land was accumulated at the bed of Tethes. Due to the downward pressure of the layers of the silt the bed of Tethis went downword and the two land came closer. For this reasen the fold occured on the silt and it uplifted to form a mountain. As the fold mountain is originated from geosyncline the bredth of the mountain is lesser than the length of the mountain.

Question 2.
What is valcanic Mountain?
Answer:
Hot molten magma remains in the earth chamber. For earth’s movement or only other causes the hot molten magma expands. At that time due to changing of earth’s movement the magma comes out through any openings of the earth’s surface and deposits around the cracks to form volcanic mountain. Due to the course of time it becomes conical in shape. This is called valcanoic mountain.

The example of the volcanic mountains are Etna in Sicily, Visuvius in Italy, Kilimanjaro in Africa, Fujiyama in Japan etc. But the Guaiyati in Chilly is he highest(19.082 \mathrm{Ft})$ active volcanic mountain of the world.

Question 3.
Classify the volcanie mountain according to their shape and structure.
Answer:
According to the shape and structure the volcanic mountains are classified into four categories-i) Volcanic mountain with conical shape, ii) Volcanic mountain with dome shape, iii) Valeanic mountain with explossive crater, iv) Volcanic Mountain with composite conical.
i) Volcanic mountain with conical shape : This is formed by large explosion. It looks like cone, This type of volcano is found in Japan.
ii) Volcanic mountain with dome shape : Due to large explosion the thick magma comes out form dome shaped Volcano. This types of volcano is found in Hawai island.
iii) Volcanie mountain with explossive crater : This type of volcano is formed due to large explosion by making big crater. This type of volcanic mountain is found in lceland.
iv) Composit volcanic mountain with conical shape : When explosion countinues for long time a main erativ forms with other earths surrounded it. This type of Valcano is found in Maxico.

Question 4.
Classify Plateaus according to their origin.
Answer:
According to their origin plateaus are classified into three categories-i) Dissected plateau, ii) Intermontane plateau, iii) Lava plateau
i. Causes for the origin of dissected plateau : Sometimes the old fold mountain is eroded by the natural forces for long time to form high plateau: When the soft rocks of the high mountain eroded or brought away by the wind or river water leaving the hard rocks only as the peak of the mountain then it is called Residual plateau. The Residual plateau is sometimes dissected by narow river vally, it is called dissected plateau. The example of dissected plateaus are Bindhya plateau in India, Highland of Scottland etc.

ii. Cause for the origin of Intermontane plateaus: At the time of the formation of fold mountain the places comperatively lower uplifted to form plateaus for the earthquake. This type of plateaus are generally surrounded by the mountains. This is called inter mountaine plateau. The example of intermontane plateaus are the Tibetan plateau, Iranian plateau etc.

iii. Cause for the origin of volcanic plateaus: The lava plateau is made up with bassalt rock. The hot molten lava comes out through the openings of the earth surface and begines to accumulate to the earths surface. In due course of the time the lava cools down and hardens to form plateau. This types of plateau froms due to the accumulation of lava. Thus it is called lava plateau or volcanic plateau or depositional plateau. The example of this type of plateau in the Decan plateau in India, the Somalian and Etheopian plateau, the Puner plateau in Argentina.

Question 5.
Classify the plain according to their origin.
Answer:
According the their origin plains are classified mainly into two categories-

1. Plain of accumulation
2. Plain created by earths movement.

1. The classification of plain of accumulation : The plain of accumulation is also devided into 8 categories-

1. alluvial plain
2. flood plain
3. deltaic plain
4. coastal plain
5. lake plain
6. Lava plain
7. Glacier plain
8. loess plain

2. Plain created by earth movement : This type of plain is classified into two categories

1. uplifted and
2. downward plain.

Question 6.
Write the causes for the formation of different plains.
Answer:
i) The silt accumulated under the rivers, seas and lakes to form alluvial plain (genstic plain), ii) For the volcanic erruption of the volcano (lava plain-northen part of the Decan), iii) the plain formed by the glacier (Prairries in North America), iv) In desert region the sand blown by the wind and deposited to form plain (Loess plain in china), v) The low hills and plateau eroded to form plain (some part of the Ranchi plateau), vi) For earthquake high land goes downward to form plain (Taranian plain) or uplifted to form plain (Karamandal coast in India).

Question 7.
Write the influence of Mountains in the human life.
Answer:
Very high (900 m and above) and very extensive landmass is known as mountain. It has influence in human life-

1. The mountain has an important role in originating rivers and streams.
2. It regulates the climate.
3. The facilities of livelihood are less in this region.
4. Lack of population in this region.
5. Agriculture, industry could not be flourished in mountain region.
6. Mountain helps to grow tourism.
7. The people of the mountain region are hard and active.

Question 8.
Mention the influence of plateau in human life.
Answer:
The influences of plateau in humans life are–

1. Agriculture is not suitables in rocky plateau region.
2. The rivers of the plateau are suitable for generating hydroelectric power.
3. There is lack population in this region.
4. The pleasant weather of plateau is fit for tourism.
5. Sufficient minerals are formd in the plateau region.
6. The communication system is not so developed.

Question 9.
Write the influences of plain in human life.
Answer:
The influences of plain in human life are-

1. The alluvial soil is fentile and suitable of agriculture.
2. The pondlable water is avilable in plain.
3. The life of the people of plain is easy and comfortable.
4. Due to the facility of life is more, the people are lazy and weak.
5. The communication system is highly developed.
6. Riverine civilization has been flourished in the plain.

Detailed explanations in West Bengal Board Class 7 Geography Book Solutions Chapter 3 Air Pressure offer valuable context and analysis.

WBBSE Class 7 Geography Chapter 3 Question Answer – Air Pressure

Multiple Choice Questions & Answers : ( 1 mark for each question)

Question 1.
Which is false, air is-
i) colourless
ii) odorless
iii) volumeless
Answer:
iii) volumeless

Question 2.
Which is false, molecules are visible in-
i) solid
ii) gas
iii) liquid
Answer:
ii) gas

Question 3.
With the increase of altitude the air pressure and temperature –
i) decreases
ii) increases
iii) remains same
iv) may increase or decrease
Answer:
i) decreases

Question 4.
The air pressure in equitorial and tropical regions are –
i) medium
ii) low
iii) high
iv) may be high or low
Answer:
ii) low

Question 5.
High pressure areas usually experience the weather-
i) cloudy
ii) rainy
iii) stormy
iv) calm
Answer:
iv) calm

Question 6.
Example of a violent fast wind-
i) syclone
ii) hurricane
iii) typhoons
iv) all the winds
Answer:
iv) all the winds

Question 7.
Low pressure areas usually experience the weather-
i) stormy
ii) clear sky
iii) calm
Answer:
i) stormy

Question 8.
The imaginary line which connect equal pressure region in weather map is known as –
i) isobar
ii) isotherm
Answer:
i) isobar.

Question 9.
The region where temperature remain high, there prevails-
i) high pressure
ii) low pressure
Answer:
low pressure.

Question 10.
Moist air is-
i) lighter
ii) heaver than dry air
Answer:
lighter

Fill in the blanks : (I mark for each question)

1. The hight of the Mount Everest is ________.
Answer:
8848m.

2. The air pressure is almost per ________ square centimeter.
Answer:
1 kg.

3. ________is an important factor to determine the weather and in our day to day life.
Answer:
Air pressure.

4. Air pressure ________ with the increasing of altitude.
Answer:
reduces.

5. The air exerts pressure to ________ derection.
Answer:
all.

6. ________ is used for measuring air presure.
Answer:
Barometer.

7. The density of air ________ with the increasing of altitude.
Answer:
decreases.

8. The air gets heated by ________ process.
Answer:
three.

9. In the cooler region of Earth’s surface ________ pressure prevails.
Answer:
high.

10. Water vapour remains very ________ in cooled and heavy air.
Answer:
low.

11. Isober expressed in ________.
Answer:
Milibar.

12. Volume of air changes with the ________.
Answer:
change of temperature.

13. Moist air is ________ than dry air.
Answer:
lighter.

14. Air pressure is maximum on ________ of the earth.
Answer:
sea surface.

15. Low pressure generate around equator and high pressure in both the ________.
Answer:
tropics.

State whether True or False : ( 1 mark for each question)

1. Air has mass and volume.
Answer:
true

2. The air pressure per square foot is about weight of one tonne of material.
Answer:
true

3. Molecules in solid and liquid are not visible.
Answer:
false

4. Air pressure is very significant in our daily lives.
Answer:
true

5. Air pressure at sea level is equal to that of a 72 cm column of mercury.
Answer:
false

6. Moister-laden air is heavier than dry air.
Answer:
false

7. Warm air expands and starts to move upwards. is
Answer:
true

8. Isobar represent air pressure meacured in milibars. is
Answer:
true

9. High pressure areas usually experience cloudy weather.
Answer:
false

10. Air in low pressure area is usually light and expanding.
Answer:
true

11. Air flows from high pressure to those of low pressure.
Answer:
true

12. The The instrument used to measure air pressure is called Barometer.
Answer:
true

Match the column A with column B.

Column A	Column B
a) There is some air	i) low air pressure
b) Molecles in solid	ii) heavier
c) There is no air	iii) towards the surface of the earth
d) Boiling point of water drops	iv) are visible
e) Turbulent weather is a result of	v) weather in low pressure areas
f) Cold polar regions have	vi) in our body
g) Dry air is	vii) higher air pressure
h) We have cloudy, stormy	viii) in the space
i) Cloud and heavy air sinks	ix) in mountanious regions

Answer:
a) There is some air in our body.
b) Molecles in solid are visible.
c) There is no air in the space.
d) Boiling point of water drops in mountanious regions.
e) Turbulent weather is a result of low air pressure.
f) Cold polar regions have higher air pressure.
g) Dry air is heavier.
h) We have cloudy, stormy weather in low pressure areas.
i) Cloud and heavy air sinks towards the surface of the earth.

Very Short Questions & Answers : (1 mark for each question)

Question 1.
How much presure does air exert per square ft ?
Answer:
Air exerts the pressure of 1 tonne per square ft.

Question 2.
Why is the space suit of astronauts filled with air.
Answer:
There is no air in space. So to keep the balance in pressure between internal air pressure and the outer air the spacc suit of astronaut filled with air.

Question 3.
Why is the air pressure maximum on sea surface?
Answer:
The air pressure is maximum on sea surface because the gravitational pull is maximum in sea surface.

Question 4.
What is the air pressence of sea surface?
Answer:
The air pressure on sea surface is 101325 ml.

Question 5.
Who discovered the mercury Barometer?
Answer:
The scientist Torricelli discoming the mercury Barometer.

Question 6.
How does the mercury level react if the pressure increases?
Answer:
If the pressure increase the mercury level also increases.

Question 7.
How does the air pressure vary with the increasing of every 110 altitude.
Answer:
With the increasing of every 110 m altitude to the air pressure reduces equal to 1 cm mercury level.

Question 8.
What is isobar?
Answer:
The imaginery line which connect equal pressure region in weather map is known as isobar.

Question 9.
Where is the rotational speed is maximum on the Earth?
Answer:
The rotational speed is maximum in and around equator.

Question 10.
Why there are problems of boiling of cooking anticles in high altitude?
Answer:
In high altitude the boiling point is less then 100° C that causes problems of boiling of cooking articles in high altitude.

Question 11.
Why does the astronauts carry oxygen cylinders with them?
Answer:
At high altitudes air with oxygen becomes scarce, so astronauts carry oxygen cylinders with them.

Question 12.
Which air is lighter-moister-laden or dry air?
Answer:
Moister-laden air is lighter than dry air.

Question 13.
Where is the speed of earth’s rotation highest?
Answer:
The speed of earth’s rotation is highest at the equator.

Question 14.
Where does stormy and turbulent weather prevail?
Answer:
Stormy and cloudy weather prevails in low pressure areas.

Question 15.
What kind of air is formed in a high pressure area?
Answer:
In a high pressure area air is sold and compact..

Short Questions & Answers : (2 marks for each question)

Question 1.
What is air pressure? How can it be clasiffied.
Answer:
In certain place on the earth surface the layers of air exerts pressure per square centimeter which is known as air pressure. There are two types of air pressure high pressure and low pressure.

Question 2.
Why do we not feel the air pressure.
Answer:
In spite of living in water the fish can not feel the pressure of water. Similarly in spite of living in the lowest layer of air we can not feel the air pressure. This is because our body pressure and the atmospheric prerssure is equal.

Question 3.
The air exerts pressure-Prove it with an experiment.
Answer:
Take a glass full of water and place a post card to cover the glass. Now if we turn over the glass we see the post card sets firmly on the glass and water remain as it. It proves that the air exerts pressure over the post card in upward direction.

Question 4.
What are high pressure and low pressure region?
Answer:
In which places the air pressure is more than that of surrounding area is called high pressure region. On the orther hand in which places the air pressure is lesser than that of surrounding areas is called low pressure region.

Question 5.
What will be the weather of two places? If you travel from the Puri beach to Mount Everest, what types of changes in your daily life are likely to happen?
Answer:
As the Mount everest is higher than the sea level the temperature is lesser than Puri. Thus the climate of Mount Everest is very cold if we travel from Puri to Mount Everest we have to use wollen cloths due to the cold climate.

Question 6.
What is the cause of variation in air presure.
Answer:
Circulation of air in the atmosphere is caused by pressure differences generated primarily by uneven isolation Air flows from areas higher pressure to areas of lower pressure.

Question 7.
What is the normal range for air pressure?
Answer:
A metric unit has been defined to describe normal atmospheric pressure, called a bar, and the instrument become a barometer. Normal average sea-level pressure is 1.o1325 bars.

Long Questions & Answers : (3 marks for each question)

Question 1.
What is isobar? What are its characteristics?
Answer:
Isobar is the imaginary line which connects equal pressure region in weather map. The characteristics of isobar are-

1. The unit in which isobar is expressed is milibar. The normal air pressure over the Earth varries from 980 to 1050 ml.
2. It is expressed according to the presure on sea level.
3. They never intersects or touch one another.
4. The difference of air pressane is maximum when the lines of isobars are very closed to each other.

Question 2.
What are the characteristics of high presure.
Answer:
The characteristics of this high pressure are:

1. The high pressure is created when the temperature of air islow. Thus the high pressure prevails mountain region and cold polar region.
2. For being cold the air of high pressure region is compressed.
3. High pressure develops due to the decending nature of air. Thus cold air goes down in the cold region, the denisity of air increases and pressure also increases.
4. The water vapour present in cool and heavy air is very low. That is why the cloud, rain etc are not occured in high pressure rigion.

Question 3.
What are the characteristics of low pressure.
Answer:
The characteristics of low prresure are-

1. The low pressure creates for the increasing of the temperature of air. Low pressure is found in Equoatorial and tropical region.
2. The air in low pressure region is light and expanded.
3. In the hot region the air on the earth’s surface gets heated and rises up. Thus the density of air near the earth surface decreases and the air pressure also decreases.
4. The water vapour in hot air condensed into water droped or ice when the air comes contact of cold air at upper layer. So the cloud formation, rain storm and rough weather occured in low pressure area.

Question 4.
What are the causes for the variation of air pressure.
Answer:
The causes for the variation of air pressure are-
i. The amount of water yapour in air: The water vapour is lighter than dry air. So the water vapour containing air is lighter and exerts less pressure than dry air. This is why in rainy season the air pressure decreases than in summer.

ii. The temperature of air: Like other substance the air expands in getting heated and the density of air decreases. Then the air becomes lighter. The light air exerts less pressure and the capasity of holding water vapour increases when the air becomes hot. So at the places where waer bodies are more the air becomes wet and exerts less pressure. On the other hand the capasity holding air of cold air is less, thus it exerts more pressure. Therefore the air pressure is more in winter than in summer.

iii. The altidude: The air has many layers. The layers lie one above another. So the upper atmospheric layers exerts force on the lowest level that lies closest to the earth surface. So the density of the level is meny high and the density is gradually decreased with the altitude. The weight of the air with low density is lesser and thus. it exerts less pressure. So as proceed to the high altitude from the sea level the air pressure decreases.

iv. The depth of the atmosphere: The air pressure varies due to the variation of the depth of atmosphere. The 90% eliment of the atmosphere are present within 16 km from the earth surface. So the depth of the atmosphere that prevails on the sea level is not present on high mountain. So the depth of the air and atmospheric pressure decreases with the altitude.

Question 5.
Describe the different pressure belt of Earth.
Answer:
The temperature of the air in different places is determined by the angle in which the sunrays fall on the earth. According to the different temperature of this air the Earth is divided into different pressure belt. But the pressure belts shift a little with the season change. The differnce of air pressure causes the wind blows. There are two types of air pressure.
i) High pressure and low pressure: According to air pressure the Earth is devided into seven permanent pressure belt. They are as fallows :

ii) Equatorial low pressure belt : The sun rays fall directly on the both side of the equator between 5°-10°north and south. The air of this region is hot and light. On the other hand the water body is more than the land mass here. This waters body gets healed by the tremendous heat of the sun and the water vapour rises up and mixes with to air. Thirdly – due to the rotation of the earth the air of the region gets deflected to the north and south. Thus this region is the most powerful low pressure belt.

iii) Sub tropical high pressure belt: This pressure belt lie to the both side of tropic of cancer and in the northern hamisphere and to the both side of tropic of capricorn in southern himsphere. The hot air of equatorial region rises up an gets cool there. Then its became heavy and came down to this two tropical region resulting high pressure belt.

iv) and (v) Polar high pressure belt: The speed of rotation of the Earth is minimum near the pole. Besides dwtethis. Slanting sun rays the water vapour is less in this region. The day and night’s one with a span of six months. Therefore the region remains ice capped through out the year. The density of the air is high that creats high pressure belt.

vi) and (vii) : Sub polar low pressure belt : At 60°-65° latitude of two hemisphere the low pressure belt is created due to the deflectic of the air.

Additional Questions and answers :

Question 1.
Write the characteristics of high pressure.
Answer:

1. Places with lower temperature, like the cold temperate and polar regions, have high air pressure.
2. Air in a high pressure area is usually cold and compacted.
3. Cold and heavy air naturally sinks towards the surface of the earth, gets denser and exerts higher pressure.
4. Cold and dense air is generally dry. So high pressure areas usually do not experience cloudy or rainy weather. Calm weather and clear sky prevail here.

Question 2.
Write the characteristics of low pressure.
Answer:

1. Places with higher temperature, like the equatorial and tropical regions, have low air pressure.
2. Air in a low pressure area is usually light and expanding.
3. In warm areas, air near the surface of the earth gets heated and becomes light. Thus it rises and the ascent of air creates low pressure.
4. The water vapour in hot air is condensed as the air cools down in high altitude. Hence water droplets or snow/ ice is formed. This is why we have cloudy, rainy, stormy and turbulent weather in low pressure areas.

Question 3.
What is the cause of flow of air?
Answer:
Air flows from areas of high pressure to those of low pressure. This proves that the difference in pressure between two areas is mainly responsible for the flow of air between them. Also, it is this flow that helps in maintaining the balance between high and low pressure zones on the earth’s surface. The more is the pressure difference, i.e. the lower the air pressure in the low pressure zones, the more is the speed of the wind blowing into that zone from the surrounding high pressure areas to keep up the balance of air pressure. When devastation is caused to life and property by violent fast winds, then those winds are known as cyclones, typhoons, hurricanes, tornadoes etc.

Question 4.
Write the causes of variation of air temperature.
Answer:
Volume and density of air change with changes in temperature. The air molecules get activated by heat and start moving apart. Thus, warm air expands, gets lighter and starts to move upwards. Its density is also reduced. So the number of molecules in a specific volume of air is also reduced. This reduces air pressure. When air cools down, it shrinks and its density increases. This increases air pressure. This is why the cold polar regions have higher air pressure but the hot equatorial region has low air pressure.

Gravity and pressure of overlying air lead to greater density and therefore, greater pressure of air near the earth’s surface. These molecules disperse with altitude and the air becomes gradually less dense and exerts less pressure. This is the reason why the boiling point of water drops in mountainous regions. That is, water starts boiling at a temperature below 100° C when the air pressure drops.

Moisture-laden air is lighter than dry air. So, it exerts less pressure. Rainy, stormy, turbulent weather is actually a result of the low air pressure that is generated by moisture-laden air. Dry air is heavier and leads to the formation of high air pressure condition.

Question 5.
Is air pressure the same everywhere?
Answer:
Air pressure is maximum at the sea level on the surface of the earth. Gravitational pull and the great pressure of overlying air bring the molecules of air closer to each other. So the density and air pressure increase. As altitude increases, the molecules of air are spaced apart and the density decreases. Thus, the air pressure and temperature decreases with the increase of attitude.

Question 6.
Why don’t we feel the the air pressure?
Answer:
There is some air inside our body. That is also axerting equal and opposite pressure to that of the outer air on the surface of oyr body. This is why we do not feel the pressure.