Multiple choice

What do geologists call the crust and uppermost mantle?

  1. lithosphere

  2. Asthenosphere

  3. Mesosphere

  4. Outer Core

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A Correct answer
Explanation

The lithosphere is the rigid, outermost shell of Earth, consisting of the crust and the solid, uppermost portion of the mantle. The asthenosphere lies directly below the lithosphere and is semi-fluid.