Choose the right answer from the four al | Class 9 Social Science - Contemporary India Chapter Natural Vegetation and Wildlife, Natural Vegetation and Wildlife NCERT Solutions

Answer the following questions briefly.
(i) Define an ecosystem.
(ii) What factors are responsible for the distribution of plants and animals in India?
(iii) What is a bio-reserve? Give two examples.
(iv) Name two animals having habitat in tropical and montane type of vegetation.

Quite a few species of plants and animals are endangered in India. Why?

Distinguish between
(i) Flora and Fauna
(ii) Tropical Evergreen and Deciduous forests

Name different types of Vegetation found in India and describe the vegetation of high altitudes.

Why has India a rich heritage of flora and fauna?

Write short notes on the following.
(i) The Indian Desert
(ii) The Central Highlands
(iii) The Island groups of India

Give reasons as to why.
(i) Seasonal reversal of wind direction takes place over the Indian subcontinent?
(ii) The bulk of rainfall in India is concentrated over a few months.
(iii) The Tamil Nadu coast receives winter rainfall.
(iv) The delta region of the eastern coast is frequently struck by cyclones.
(v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone.

Describe the regional variations in the climatic conditions of India with the help of suitable examples.

Why does the rainfall decrease from the east to the west in Northern India.

The central location of India at the head of the Indian Ocean is considered of great significance. Why?

Describe how the Himalayas were formed.

Give the characteristics and effects of the monsoon rainfall in India.

Answer the following questions briefly.
(i) What are the controls affecting the climate of India?
(ii) Why does India have a monsoon type of climate?
(iii) Which part of India does experience the highest diurnal range of temperature and why?
(iv) Which winds account for rainfall along the Malabar coast?
(v) What are Jet streams and how do they affect the climate of India?
(vi) Define monsoons. What do you understand by “break” in monsoon?
(vii) Why is the monsoon considered a unifying bond?

Discuss the mechanism of monsoons.

The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat in the west but the watches show the same time. How does this happen?

Write short notes on the following.
(i) The Indian Desert
(ii) The Central Highlands
(iii) The Island groups of India

Describe how the Himalayas were formed.

Answer the following questions briefly.
(i) Name the group of islands lying in the Arabian sea.
(ii) Name the countries which are larger than India.
(iii) Which island group of India lies to its south-east?
(iv) Which island countries are our southern neighbours?

What are the advantages of having a healthy population?

What is the relation between occupational structure and development?

Distinguish between population growth and population change.

Answer the following questions briefly.
(i) Why is the rate of population growth in India declining since 1981?
(ii) Discuss the major components of population growth.
(iii) Define age structure, death rate and birth rate.
(iv) How is migration a determinant factor of population change?

What are the significant features of the National Population Policy 2000?

Why are rivers important for the country’s economy?

Compare the east flowing and the west flowing rivers of the Peninsular plateau.