73.
The ozone layer at high altitude contains
A. atomic oxygen (O) and ordinary oxygen (O2)
B. only ozone (O3)
C. mixture of atomic oxygen (O), ordinary oxygen (O2) and Ozone (O3)
D. only ordinary oxygen (O2)
Answer & Explanation
Answer: Option C
Explanation:
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74.
The number of a topographic map is 47A/16/NW. Its scale must be
A. 1 : 250,000
B. 1 : 100,000
C. 1 : 50,000
D. 1 : 25,000
Answer & Explanation
Answer: Option D
Explanation:
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75.
The right ascension is the equivalent of longitude on the celestial sphere, and it is given in the units of
A. degrees
B. time-hours, minutes and seconds
C. only hours
D. only seconds
Answer & Explanation
Answer: Option B
Explanation:
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76.
The radiation belts are zones in space around the
A. Earth
B. Jupiter and Saturn
C. Mercury
D. Earth, Jupiter and Saturn
Answer & Explanation
Answer: Option D
Explanation:
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77.
The periods of different eras are further divided into
A. eons B. epochs
C. stages D. Any of the above
Answer & Explanation
Answer: Option C
Explanation:
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78.
The Plio-Pleistocene boundary lies about ____ years ago, at the beginning of the interval of warming after the last Pleistocene glaciations.
A. 1,00,000 B. 1,000
C. 10,000 D. 100
Answer & Explanation
Answer: Option C
Explanation:
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