Atmosphere (Composition, Layers) NDA Questions

NDA Physical Geography

Atmosphere (Composition, Layers) MCQ Questions


7.
Which of the following gases makes up the majority of the Earth's atmosphere?
A.
Carbon Dioxide
B.
Nitrogen
C.
Oxygen
D.
Argon
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ANSWER :
B. Nitrogen
8.
What is the primary function of the ozone layer?
A.
To trap heat
B.
To filter out harmful UV rays
C.
To absorb ultraviolet radiation
D.
To create clouds
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ANSWER :
C. To absorb ultraviolet radiation
9.

Pick out the wrong statement:

A.

The atmosphere is composed mainly of gases

B.

The exosphere is the outermost layer

C.

The thermosphere contains few particles

D.

The stratosphere contains most of the Earth's weather

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ANSWER :

D. The stratosphere contains most of the Earth's weather

10.
The troposphere contains about ________ of the atmosphere's total mass.
A.
10%
B.
25%
C.
50%
D.
75%
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ANSWER :
B. 25%
11.
Which layer of the atmosphere is responsible for the phenomena of auroras?
A.
Mesosphere
B.
Exosphere
C.
Stratosphere
D.
Thermosphere
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ANSWER :
B. Exosphere
12.
What is the boundary between the troposphere and the stratosphere called?
A.
Tropopause
B.
Stratospause
C.
Mesopause
D.
Stratopause
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ANSWER :
A. Tropopause