extra question of geography class 9 chapter 2
Answers
EXTRA QUESTIONS OF CH- PHYSICAL FEATURES OF INDIA
1. Explain the formation of Himalayas.
The Himalayas were formed by the Tethys sea. When the Tethys sea was pressurized by the Angara land and Gondwana land, the sedimentary rocks accumulated in the Tethys were folded to form the Himalayan mountain system.
2. What is the significance of the Himalayas to India?
i) Himalayas are the source of perennial rivers e.g. Ganga, Yamuna etc.
ii) They protect India from cold Siberian winds.
iii) They prevent moisture bearing winds to cross the Indian subcontinent and thus India is not a desert.
iv) The Himalayas protect India from invaders.
v) Himalayas are rich in minerals e.g. uranium in Ladakh, sedimentary rocks like limestone etc.
3. Differentiate between eastern and western ghats.
Eastern Ghats Western Ghats
1) Located between eastern 1) Located between western coastal coastal plains and Deccan plateau. plains and Deccan plateau.
2) Average elevation is 600m. 2) Average elevation is 900-1100m.
3)Height of eastern ghats is uniform. 3) Height increases from north to south.
4) Discontinuous range with wide 4) Continuous range with small gaps created by rivers. gaps/openings e.g. Pal ghats.
5) Highest peak is Mahendragiri. 5) Highest peak is Anai Mudi.
6) Rain is uniform. 6) Western side of western ghats
receives more rainfall.
4. 'Each physiographic divisions of India compliment each other and make the country rich in resources.' Explain the statement with examples.
Himalayas: i) Himalayas are the source of perennial rivers e.g. Ganga, Yamuna etc.
ii) They protect India from cold Siberian winds.
iii) They prevent moisture bearing winds to cross the Indian subcontinent and thus India is not a desert.
iv) The Himalayas protect India from invaders.
v) Himalayas are rich in minerals e.g. uranium in Ladakh, sedimentary rocks like limestone etc.
Northern plains: i) They provide food security.
ii) They are a base for civilization.
Plateau Region: i) Storehouse of minerals.
ii) Base for industrialization.
iii) Helps in formation of black soil.
Great Indian Desert: i) Source of solar and wind energy.
Coastal Plains: i) Hub of fishing industry.
ii) Site for coconut and rice production.
iii) Help in obtaining salt from sea.
iv) Ports and harbours are located here.
v) Waterways here are the cheapest means of transport and thus boost the economy.
Islands: i)They are tourist spots and boost tourism industry.
All these physiological divisions thus make the country rich in resources and compliment each other e.g. Himalayas are the source of perennial rivers which in turn make northern plains fertile for agricultural production.
Some one- word questions are:
1. Name the southern coast of Western Coastal Plains.
Ans- it is called the Malabar Coast.
2. What are the main causes of Rock displacement?
Ans-Two main causes a rock displacement are:
Folding
Faulting and volcanic activities.
3. Which plateau is triangular in shape?
ANS: Deccan Plateau is triangular in shape.
4. Which is the world's largest and fastest growing delta?
ANS: Ganga Brahmaputra Delta is the fastest growing delta.
5. Name any 4 States situated in the Himalayas.
ANS: Himachal Pradesh, Arunachal Pradesh ,Uttarakhand and Jammu and Kashmir.
6. Where is the Karbi- Anglong Plateau located?
ANS: Karbi- Anglong Plateau is located in Assam.
7. What does Doab mean?
Doab means the land between two rivers.
8. Where is the largest saltwater lake in India?
Ans: largest saltwater lake in India is a Chilka.
9. What is a mountain pass?
Ans; A pass is a gap in a mountain range which provides a natural route to cross the mountains.
10. Divide Himalayas into different parts on the basis of height.
Ans: according to height 4 parallel ranges are found in the Himalayas:
1. Trans Himalayas
2. Great Himalayas or inner Himalayas.
3. Lesser Himalayas or middle Himalayas
4. Sub Himalayas or shiwaliks.