Biology, 12.03.2021 01:00 chloeboo

Why does the lithosphere sink back into the earth at trenches, which form the surface trace of subduction zones? A.
lithosphere is always lighter than the asthenosphere

B, the mantle is filled with gas

C. as the lithosphere moves away from the heat of the rift valley, it gets older and loses heat, ultimately giving it a higher density than the portion of the mantle which composes the asthenosphere

D. Because warm lithosphere has a higher density than the portion of the mantle which composes the asthenosphere.

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Why does the lithosphere sink back into the earth at trenches, which form the surface trace of subdu...