Earth's Layers

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Crust
Thinnest of the four layers. Made of rock. (makes up the composition of the Earth)
Mantle
Resides between the curst and outer core. Made up of the semi-solid magma (lava).
Outer Core
Consists of liquid iron and nickel.
Inner Core
Despite being the hottest of the four layers, its immense pressure turns the iron and nickel into a solid.
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