Question

Define Lithosphere.
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Answer 1

Answer:

A lithosphere is the rigid, outermost shell of a terrestrial-type planet or natural satellite, that is defined by its rigid mechanical properties. On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater.

Answer 2

Answer:

$the rigid outer part of the earth, consisting of the crust and upper mantle.$