Climatology CDS Questions

CDS World Geography

Climatology MCQ Questions


7.
The layer of the atmosphere that reflects radio waves back to the Earth, enabling long-distance radio communication, is the:
A.
Mesosphere
B.
Stratosphere
C.
Ionosphere
D.
Exosphere
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ANSWER :
C. Ionosphere
8.
Which is the outermost layer of the Earth's atmosphere that gradually merges into outer space?
A.
Thermosphere
B.
Stratosphere
C.
Exosphere
D.
Mesosphere
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ANSWER :
C. Exosphere
9.
The normal rate at which temperature decreases with altitude in the troposphere (normal lapse rate) is approximately:
A.
6.5°C per 1000 metres
B.
10°C per 1000 metres
C.
1°C per 1000 metres
D.
0.65°C per 1000 metres
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ANSWER :
A. 6.5°C per 1000 metres
10.
Standard atmospheric pressure at mean sea level is approximately:
A.
1500 millibars
B.
500 millibars
C.
1013 millibars
D.
750 millibars
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ANSWER :
C. 1013 millibars
11.
Which constituent of the atmosphere is most variable in amount and is most responsible for weather phenomena?
A.
Argon
B.
Nitrogen
C.
Oxygen
D.
Water vapour
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ANSWER :
D. Water vapour
12.
Approximately what percentage of the atmosphere's total mass is concentrated in the troposphere?
A.
About 95 per cent
B.
About 50 per cent
C.
About 20 per cent
D.
About 75-80 per cent
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ANSWER :
D. About 75-80 per cent