What is the lithosphere?

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Prepare for your Introduction to Physical Geology Exam. Tackle diverse topics with multiple-choice questions and detailed explanations. Equip yourself with knowledge about Earth's physical processes and surface features. Ace your exam with confidence!

Multiple Choice

What is the lithosphere?

Explanation:
The lithosphere is the outermost, rigid shell of Earth. It includes the crust plus the uppermost part of the mantle and behaves as a stiff, brittle layer that forms the tectonic plates. Beneath it lies the asthenosphere, a softer, partially molten region that allows these plates to move. The option describing a partly molten layer under the mantle would refer to the asthenosphere, not the lithosphere. The liquid metal core is the outer core, and the lower mantle is deeper and not the rigid shell that makes up the plates. So the outer rigid shell best describes the lithosphere.

The lithosphere is the outermost, rigid shell of Earth. It includes the crust plus the uppermost part of the mantle and behaves as a stiff, brittle layer that forms the tectonic plates. Beneath it lies the asthenosphere, a softer, partially molten region that allows these plates to move. The option describing a partly molten layer under the mantle would refer to the asthenosphere, not the lithosphere. The liquid metal core is the outer core, and the lower mantle is deeper and not the rigid shell that makes up the plates. So the outer rigid shell best describes the lithosphere.

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