The average salinity of ocean water is approximately: MCQ with Answer and Explanation

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The average salinity of ocean water is approximately:

A. 15‰

B. 35‰

C. 25‰

D. 45‰

Answer: Option B

Solution (By JKSSB Mock Tests)

The average salinity of ocean water is about 35 parts per thousand (35‰).

This question belongs to: Geography GK Physical Geography

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The Challenger Deep is located in:

A. Java Trench

B. Puerto Rico Trench

C. Tonga Trench

D. Mariana Trench

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Correct Answer: Option D

Explanation:
Challenger Deep is the deepest known point in the world's oceans, located in the Mariana Trench.

This question belongs to: Geography GK Physical Geography

Question #2

The study of volcanoes is called:

A. Petrology

B. Volcanology

C. Hydrology

D. Seismology

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Correct Answer: Option B

Explanation:
Volcanology is the scientific study of volcanoes, lava, magma, and volcanic phenomena.

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Question #3

Which factor primarily determines the length of day and night on Earth?

A. Earth's Axial Tilt

B. Ocean Currents

C. Longitude

D. Atmospheric Pressure

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Correct Answer: Option A

Explanation:
The Earth's axial tilt of about 23.5° causes variations in the length of day and night throughout the year.

This question belongs to: Geography GK Physical Geography

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