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Which one of the following describes the Lithosphere?
  1. Crust and upper mantle
  2. Upper and lower mantle
  3. Crust and core
  4. Mantle and core

Upper and lower mantle
Crust and upper mantle
Crust and core
Mantle and core
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Lithosphere is the rigid, rocky outer layer of the earth, consisting of the crust and the solid outermost layer of the upper mantle. It extends to a depth of about 100 km. It is broken into about a dozen separate, rigid blocks, or plates. The lithosphere is underlain by the asthenosphere which is the weaker, hotter, and deeper part of the upper mantle.

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