MCQ Air Chapter 4 Class 7 Geography

1. Which gas released in the atmosphere creates a greenhouse effect trapping the heat?

Carbon dioxide

Oxygen

Nitrogen

All of these

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Question 1 of 10

2. Which is the most important layer of the atmosphere?

Troposphere

Thermosphere

Mesosphere

None of these

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Question 2 of 10

3.
What is responsible for the excess of CO2?

Global warming

Global cooling

Both (a) and (b)

None of these

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Question 3 of 10

4.
What is the result when the air is heated?

Heavier

Lighter

Colder

Warmer

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Question 4 of 10

5.
Stratosphere contains a layer of which gas?

Nitrogen gas

Ozone gas

Helium gas

None of these

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Question 5 of 10

6.
In which layers all weather phenomenon occurs?

Troposphere

Stratosphere

Thermosphere

Mesosphere

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Question 6 of 10

7.
As we go up in the layers of the atmosphere what is the effect in the pressure?

Increases

Decreases

Remains the same

All of these

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Question 7 of 10

8.
In which direction the wind blows constantly throughout the year in particular direction?

Permanent winds

Local winds

Seasonal winds

Both (a) and (b)

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Question 8 of 10

9.
Which one of the following is a local wind?

Sea breeze

Trade wind

Monsoon wind

None of these

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Question 9 of 10

10.
Which of the following gases protects us from harmful sun rays?

Carbon dioxide

Nitrogen

Ozone

All of these

Your comments:

Question 10 of 10