Which mineral dominates the Earth's mantle? MCQ with Answer and Explanation

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Which mineral dominates the Earth's mantle?

A. Olivine

B. Calcite

C. Gypsum

D. Quartz

Answer: Option A

Solution (By JKSSB Mock Tests)

Olivine-rich ultramafic rocks are dominant in the Earth's mantle.

This question belongs to: Geography GK Physical Geography

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Question #1

Seismic waves that travel fastest are:

A. P-waves

B. Surface Waves

C. Love Waves

D. S-waves

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Correct Answer: Option A

Explanation:
Primary (P) waves are the fastest seismic waves and arrive first at seismic stations.

This question belongs to: Geography GK Physical Geography

Question #2

Approximately what percentage of Earth's surface is covered by water?

A. 51%

B. 61%

C. 81%

D. 71%

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Correct Answer: Option D

Explanation:
About 71% of the Earth's surface is covered by water, while 29% is land.

This question belongs to: Geography GK Physical Geography

Question #3

Which branch of physical geography deals with the study of oceans and seas?

A. Hydrology

B. Geomorphology

C. Climatology

D. Oceanography

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Correct Answer: Option D

Explanation:
Oceanography is the branch of physical geography that studies oceans, seas, marine ecosystems, ocean currents, waves, and ocean-floor features.

This question belongs to: Geography GK Physical Geography

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