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Earth Science U1A

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