Atmosphere (Composition, Layers) NDA Questions

NDA Physical Geography

Atmosphere (Composition, Layers) MCQ Questions


1.
What is the primary component of Earth's atmosphere?
A.
Nitrogen
B.
Oxygen
C.
Carbon Dioxide
D.
Argon
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ANSWER :
B. Oxygen
2.
The Earth's atmosphere is made up of ________ layers.
A.
4
B.
5
C.
6
D.
7
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ANSWER :
B. 5
3.
What percentage of Earth's atmosphere is made up of nitrogen?
A.
78%
B.
21%
C.
2%
D.
15%
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ANSWER :
A. 78%
4.
Which layer of the atmosphere is closest to the Earth's surface?
A.
Troposphere
B.
Stratosphere
C.
Mesosphere
D.
Thermosphere
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ANSWER :
A. Troposphere
5.
Pick out the correct statement:
A.
The stratosphere is the closest layer to the Earth
B.
The troposphere contains weather systems
C.
The mesosphere is where weather occurs
D.
The thermosphere is the densest layer
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ANSWER :
B. The troposphere contains weather systems
6.
The ________ layer of the atmosphere contains the ozone layer.
A.
Troposphere
B.
Stratosphere
C.
Mesosphere
D.
Exosphere
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ANSWER :
B. Stratosphere