Crust: Composition: Solid Rock, Least Dense Layer, Coldest Layer, Thinnest Layer, Mantle: Composition: Semi-molten rock/magma, Convection Currents are found here!, Outer Core: Composition: Liquid Iron and Nickel, Inner Core: Composition: Solid Iron and Nickel, Most Dense Layer, Hottest Layer,

Layers of the Earth Review!

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