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Earth Science U1A

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Across
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the living organisms of Earth
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the outermost layer that forms the surface of the earth; upper part of the lithosphere
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the layer immediately surrounding the lower mantle; composed of molten rock
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related to or possessing motion
Down
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the cool, rigid shell that includes the crust and uppermost mantle; composed of plates that move around on the underlying, plastic asthenosphere
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the water system of the earth; solid, liquid, and gas phases
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middle layer of the earth; composed of an upper and lower mantle
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all of the layers of Earth's interior and crust
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the gaseous layer of a planet, usually retained by its gravity
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innermost layer of the earth; divided into an inner and outer core