Oceanography (Oceans, Currents, Tides) NDA Questions

NDA Physical Geography

Oceanography (Oceans, Currents, Tides) MCQ Questions


1.
The relatively shallow, gently sloping submerged extension of a continent, extending from the coastline to a point where a steep slope begins, is known as the:
A.
Continental shelf
B.
Continental slope
C.
Abyssal plain
D.
Mid-oceanic ridge
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ANSWER :
A. Continental shelf
2.
The continental shelf is of great economic significance primarily because it is generally rich in:
A.
Extremely cold, uninhabitable waters
B.
Volcanic activity exclusively
C.
Marine fish resources and mineral/hydrocarbon (oil and gas) deposits
D.
Deep-sea trenches
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ANSWER :
C. Marine fish resources and mineral/hydrocarbon (oil and gas) deposits
3.
Beyond the continental shelf, the ocean floor descends more steeply towards the deep ocean basin; this relatively steep gradient zone is known as the:
A.
Continental slope
B.
Continental shelf
C.
Abyssal plain
D.
Guyot
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ANSWER :
A. Continental slope
4.
The gentle, gradually sloping surface located at the base of the continental slope, formed by accumulated sediments, marking the transition to the deep ocean floor, is called the:
A.
Oceanic trench
B.
Mid-oceanic ridge
C.
Continental rise
D.
Continental shelf
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ANSWER :
C. Continental rise
5.
The flat, extremely level regions of the deep ocean floor, generally lying at great depths and covered with fine sediments, are known as:
A.
Continental slopes
B.
Abyssal plains
C.
Seamounts
D.
Continental shelves
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ANSWER :
B. Abyssal plains
6.
Long, narrow, and extremely deep depressions found on the ocean floor, often associated with tectonic subduction zones, are known as:
A.
Guyots
B.
Oceanic (deep-sea) trenches
C.
Continental shelves
D.
Mid-oceanic ridges
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ANSWER :
B. Oceanic (deep-sea) trenches