Atmosphere and Climate Class 9 Social Science Solutions English Medium-MCQs

NCERT Solutions Class 9 Social Science English Medium

Atmosphere and Climate

Topic: MCQs

Chapter 3. Atmosphere and Climate

20 Important MCQs

1. The atmosphere is a blanket of air surrounding the:

(a) Moon
(b) Earth
(c) Sun
(d) Mars

2. Which gas forms the largest proportion of the atmosphere?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Argon

3. Approximately what percentage of the atmosphere is nitrogen?

(a) 21%
(b) 78%
(c) 0.04%
(d) 0.93%

4. Which layer of the atmosphere is closest to the Earth's surface?

(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Thermosphere

5. Most weather phenomena occur in the:

(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Exosphere

6. In which layer of the atmosphere do aeroplanes generally fly?

(a) Troposphere
(b) Lower stratosphere
(c) Mesosphere
(d) Exosphere

7. Which layer contains the ozone layer that protects life from harmful ultraviolet radiation?

(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Thermosphere

8. Which of the following is an element of weather and climate?

(a) Temperature
(b) Atmospheric pressure
(c) Humidity
(d) All of the above

9. Which are the four main seasons of India?

(a) Winter, Summer, Monsoon and Post-monsoon
(b) Spring, Summer, Autumn and Winter
(c) Winter, Spring, Rainy and Autumn
(d) Summer, Autumn, Winter and Monsoon

10. The south-west monsoon generally occurs in India during:

(a) January to March
(b) March to May
(c) June to September
(d) October to December

11. The north-east monsoon is also associated with the:

(a) Retreating monsoon season
(b) Summer season
(c) Winter season only
(d) Spring season

12. Which of the following places receives very heavy rainfall because of orographic effects?

(a) Jodhpur
(b) Shillong
(c) Leh
(d) Delhi

13. Why does Shillong receive more rainfall than Kolkata?

(a) Shillong is closer to the sea
(b) Moist air is forced to rise over the Meghalaya hills
(c) Kolkata has no monsoon
(d) Shillong has a lower latitude

14. Which station among the following receives the least annual rainfall?

(a) Mumbai
(b) Shillong
(c) Leh
(d) Thiruvananthapuram

15. Which of the following stations has an equable climate?

(a) Thiruvananthapuram
(b) Leh
(c) Jodhpur
(d) Delhi

16. Which place receives significant rainfall during the retreating monsoon?

(a) Chennai
(b) Jodhpur
(c) Leh
(d) Delhi

17. Which of the following is the hottest station in February among the given stations?

(a) Leh
(b) Delhi
(c) Thiruvananthapuram
(d) Shillong

18. Which station records the highest temperature in June among the given stations?

(a) Jodhpur
(b) Mumbai
(c) Chennai
(d) Thiruvananthapuram

19. Why does Chennai receive more rainfall after the fury of the south-west monsoon is over in most parts of India?

(a) It receives rainfall from the north-east/retreating monsoon
(b) It is located in the Himalayan region
(c) It receives rainfall only from western disturbances
(d) It is far from the Bay of Bengal

20. The monsoon provides a strong framework of climatic unity to India because:

(a) All parts of India receive the same amount of rainfall
(b) All parts of India have the same temperature
(c) Its seasonal rhythm influences the life, agriculture and economy of the country
(d) India has only one climatic region

Answer Key

1. (b) Earth
2. (c) Nitrogen
3. (b) 78%
4. (c) Troposphere
5. (a) Troposphere
6. (b) Lower stratosphere
7. (b) Stratosphere
8. (d) All of the above
9. (a) Winter, Summer, Monsoon and Post-monsoon
10. (c) June to September
11. (a) Retreating monsoon season
12. (b) Shillong
13. (b) Moist air is forced to rise over the Meghalaya hills
14. (c) Leh
15. (a) Thiruvananthapuram
16. (a) Chennai
17. (c) Thiruvananthapuram
18. (a) Jodhpur
19. (a) It receives rainfall from the north-east/retreating monsoon
20. (c) Its seasonal rhythm influences the life, agriculture and economy of the country

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