What defines the three layers, the crust, mantle, and core?

1. (CRUST)
2. (MANTLE)
3. (CORE)


Answer: Their chemical composition

1. (CRUST)
earths stiff, rigid, rocky shield
is completely solid
part of this layer has a relative homogenous composition, while another part is composed of many rock types

2. (MANTLE)
contains rock rich in magnesium and iron
contains a weak layer below the lithosphere

3. (CORE)
contains a liquid outer layer and a solid inner
contains nickel and iron

Environmental & Atmospheric Sciences

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