Obsidian is a type of: MCQ with Answer and Explanation

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Obsidian is a type of:

A. Sedimentary Rock

B. Organic Rock

C. Metamorphic Rock

D. Volcanic Glass

Answer: Option D

Solution (By JKSSB Mock Tests)

Obsidian forms when lava cools very rapidly, preventing crystal formation and creating natural volcanic glass.

This question belongs to: Geography GK Physical Geography

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Question #1

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An estuary is formed where:

A. Two rivers join

B. A glacier meets a mountain

C. A volcano meets the ocean

D. A river meets the sea

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Correct Answer: Option D

Explanation:
An estuary is a partially enclosed coastal body of water where freshwater mixes with seawater.

This question belongs to: Geography GK Physical Geography

Question #2

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The hanging valleys are characteristic features of:

A. River Erosion

B. Marine Erosion

C. Glacial Erosion

D. Wind Erosion

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Correct Answer: Option C

Explanation:
Hanging valleys are formed when tributary glaciers join larger glaciers, leaving elevated valley floors.

This question belongs to: Geography GK Physical Geography

Question #3

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Which latitude is known as the Antarctic Circle?

A. 66½° N

B. 66½° S

C. 90° S

D. 23½° S

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Correct Answer: Option B

Explanation:
The Antarctic Circle lies at approximately 66½° South latitude.

This question belongs to: Geography GK Physical Geography

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