Practicing Class 9 Social Science MCQ and Class 9 SST Chapter 3 Atmosphere and Climate MCQ Online Test with Answers daily helps in time management.
Class 9 SST Chapter 3 Atmosphere and Climate MCQ
MCQ on Atmosphere and Climate Class 9
Atmosphere and Climate MCQ Class 9
Question 1.
Which gas forms the largest part of the atmosphere?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Argon
Answer:
(c) Nitrogen
Question 2.
Which layer contains the ozone layer?
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Exosphere
Answer:
(b) Stratosphere
Question 3.
Most weather phenomena occur in the:
(a) Mesosphere
(b) Thermosphere
(c) Stratosphere
(d) Troposphere
Answer:
(d) Troposphere
Question 4.
The uppermost layer of the atmosphere is:
(a) Thermosphere
(b) Mesosphere
(c) Exosphere
(d) Stratosphere
Answer:
(c) Exosphere
Question 5.
Most meteorites entering from space burn up in the:
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Thermosphere
Answer:
(c) Mesosphere
Question 6.
Air moves from:
(a) Low pressure to high pressure
(b) High pressure to low pressure
(c) East to west only
(d) Sea to land only
Answer:
(b) High pressure to low pressure
Question 7.
Which season is known as the advancing monsoon season? :
(a) Winter
(b) Summer
(c) Monsoon
(d) Post-monsoon
Answer:
(c) Monsoon
Question 8.
The Arabic word “Mausim” means:
(a) Rain
(b) Wind
(c) Season
(d) Climate
Answer:
(c) Season
Question 9.
South-west monsoon generally occurs between:
(a) October-February
(b) June-September
(c) March-May
(d) January-March
Answer:
(b) June-September
Question 10.
Which greenhouse gas is mainly responsible for global warming?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Helium
Answer:
(c) Carbon dioxide
Atmosphere and Climate Class 9 Assertion and Reasoning Questions
There are two statements in each question marked as Assertion (A) and Reason (R). Choose your answer as per the option given below:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Question 1.
Assertion (A): Most weather changes occur in the troposphere.
Reason (R): The troposphere contains water vapour and clouds.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Question 2.
Assertion (A): Aeroplanes generally fly in the stratosphere.
Reason (R): The stratosphere is mostly free from weather disturbances.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Question 3.
Assertion (A): Air moves from high-pressure areas to low-pressure areas.
Reason (R): Wind is caused by pressure differences.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Question 4.
Assertion (A): The South-West Monsoon accounts for most of the rainfall in India throughout the year.
Reason (R): Moist winds blow from oceans towards the land.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Question 5.
Assertion (A): Climate change is a serious global challenge.
Reason (R): Human activities increase greenhouse gases in the atmosphere.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Atmosphere and Climate Class 9 Fill in the Blanks
1. The atmosphere is held around the Earth by _________ .
Answer:
gravity
2. Nitrogen forms about _________ of the atmosphere.
Answer:
78%
3. The transition zone between the troposphere and stratosphere is called the _________
Answer:
tropopause
4. The ozone layer protects us from harmful _________.
Answer:
ultraviolet radiation
5. Humidity refers to the presence of _________ in the air.
Answer:
water vapour
6. The pressure exerted by the weight of air is called _________
Answer:
atmospheric pressure
7. A local wind that blows from sea to land during the day is called _________
Answer:
sea breeze
8. India a experiences a _________ climate.
Answer:
tropical monsoon
9. The winter monsoon is also called the _________.
Answer:
north-east monsoon
10. The total amount of greenhouse gases released due to human activities is known as _________
Answer:
carbon footprint.
Atmosphere and Climate Class 9 True or False
1. Oxygen is the most abundant gas in the atmosphere.
Answer:
False
2. Clouds are mainly found in the troposphere.
Answer:
True
3. Temperature increases with altitude in the mesosphere.
Answer:
True
4. The ionosphere, a part of the thermosphere helps in radio communication.
Answer:
False
5. Climate refers to day-to-day atmospheric conditions.
Answer:
True
6. Rain‘ is the most common form of precipitation.
Answer:
True
7. High-pressure areas are generally associated with cloudy weather.
Answer:
False
8. Land breeze blows during the night.
Answer:
True
9. Monsoon winds are seasonal winds.
Answer:
True
10. Climate change has no impact on agriculture.
Answer:
False
Atmosphere and Climate Class 9 Match the Following
Question 1.
| Column A | Column B |
| (A) Troposphere | (i) Meteors bum |
| (B) Stratosphere | (ii) Weather phenomena |
| (C) Mesosphere | (iii) Ozone layer |
| (D) Thermosphere | (iv) Radio transmission |
(a) (A) – (ii), (B) – (iii), (C) – (i), (D) – (iv)
(b) (A) – (i), (B) – (ii), (C) – (i), (D) – (iv)
(c) (A) – (iii), (B) – (ii), (C) – (i), (D) – (iv)
(d) (A) – (iv), (B) – (ii), (C) – (i), (D) – (iii)
Answer:
(a) (A) – (ii), (B) – (iii), (C) – (i), (D) – (iv)
| Column A | Column B |
| (A) Troposphere | (ii) Weather phenomena |
| (B) Stratosphere | (iii) Ozone layer |
| (C) Mesosphere | (i) Meteors bum |
| (D) Thermosphere | (iv) Radio transmission |
Question 2.
| Column A | Column B |
| (A) Winter Monsoon | (i) October-December |
| (B) Summer Season | (ii) June-September |
| (C) Advancing Monsoon | (iii) April-June |
| (D) Post-Monsoon | (iv) October-February |
(a) (A) – (ii), (B) – (i), (C) – (ii), (D) – (iv)
(b) (A) – (ii), (B) – (iii), (C) – (i), (D) – (iv)
(c) (A) – (iii), (B) – (i), (C) – (ii), (D) – (iv)
(d) (A) – (iv), (B) – (iii), (C) – (ii), (D) – (i)
Answers:
(d) (A) – (iv), (B) – (iii), (C) – (ii), (D) – (i)
| Column A | Column B |
| (A) Winter Monsoon | (iv) October-February |
| (B) Summer Season | (iii) April-June |
| (C) Advancing Monsoon | (ii) June-September |
| (D) Post-Monsoon | (i) October-December |