crust:  the outer layer of the earth that is made of rock. It is very thin compared to the Earth's other layers. (Click here to read more)

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mantle:  the layer of rock beneath Earth's crust. The rock just under the crust is solid but because the mantle is very hot, most of the mantle is soft like melted candy. (Click here to read more)

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core:  the center layer of Earth and the hottest layer. (Click here to read more)

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plates:  rigid blocks of the Earth's crust and upper mantle. (Click here to read more)

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decomposition: breaking into smaller parts.

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silica: determines how sticky lava is

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magma chamber: area where magma is stored before a volcanic eruption (Click here to learn more)

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