13.
The propagation of radio signals is greatly influence by
A. troposphere B. ionosphere
C. exosphere D. thermosphere
Answer & Explanation
Answer: Option B
Explanation:
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14.
The pyramidal peaks that form when several cirques chisel a mountain form three more sides are called
A. horns B. cirques
C. aretes D. medial moraines
Answer & Explanation
Answer: Option A
Explanation:
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15.
The process that involves the eroded material being dissolved and carried along in water as individual ions is called
A. solution B. suspension
C. saltation D. traction
Answer & Explanation
Answer: Option A
Explanation:
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16.
The relative abundance of dissolved salts in seawater in descending order is as follows
A. chlorine, sodium, sulphate, magnesium, calcium, potassium
B. sodium, chlorine, magnesium, potassium, sulphate, calcium
C. chlorine, magnesium, calcium, sodium, potassium, sulphate
D. chlorine, sodium, magnesium, calcium, potassium, sulphate
Answer & Explanation
Answer: Option A
Explanation:
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17.
The planets with no natural satellites (reported so far) are
A. Mercury and Venus
B. Earth and Pluto
C. Mars and Neptune
D. Jupiter and Saturn
Answer & Explanation
Answer: Option A
Explanation:
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18.
The percentage of the incident radiation reflected back to space is called
A. planet’s albedo
B. earth’s albedo
C. both are similar terms
D. None of the above
Answer & Explanation
Answer: Option A
Explanation:
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