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4.10: Earth's Layers

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
asthenosphere The layer below the lithosphere, made of a portion of the upper mantle, that is ductile.
core The innermost, densest layer of a celestial body. Earth's metallic core has an inner solid layer and an outer layer of liquid metal. The sun's core is where nuclear fusion takes place.
crust The rocky outer layer of the Earth's surface. The two types of crust are continental and oceanic.
lithosphere The layer of solid, brittle rock that makes up the Earth's surface; the crust and the uppermost mantle.
mantle The middle layer of the Earth; made of hot rock that circulates by convection.

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Difficulty Level:
At Grade
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Date Created:
Feb 24, 2012
Last Modified:
Aug 12, 2016
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SCI.ESC.314.L.1