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Question

The _____________ is the layer beneath the lithospheric mantle lying about 100 kilometers to 410 kilometers beneath Earth’s surface.

A
troposphere
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B
asthenosphere
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C
mesosphere
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D
thermosphere
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Solution

The correct option is B asthenosphere
The asthenosphere is the layer beneath the lithospheric mantle. It lies about 100 kilometres to 410 kilometres beneath Earth’s surface. The temperature and pressure of the asthenosphere are so high that rocks soften and melt partially, making this layer semi-molten.

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