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Question : The upper portion of the mantle is called ____.

Option 1: asthenosphere

Option 2: barysphere

Option 3: mesosphere

Option 4: lithosphere


Team Careers360 25th Jan, 2024
Answer (1)
Team Careers360 27th Jan, 2024

Correct Answer: asthenosphere


Solution : The correct answer is asthenosphere.

The upper portion of the mantle is known as the asthenosphere. There are three layers of the earth, namely, the crust, mantle, and core. The asthenosphere is a weak portion below the lithosphere. It is generally hotter and more viscous than the lithosphere. The asthenosphere is composed mainly of magnesium and iron.

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