Of the three primary compositional layers of the Earth (crust,mantle,core),which is the thickest layer?
A)crust
B)mantle
C)core
D)The mantle and core are the same thickness.

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The Answer of Of the three primary compositional layers of the Earth (crust,mantle,core),which is the thickest layer?
A)crust
B)mantle
C)core
D)The mantle and core are the same thickness.

Of the Three Primary Compositional Layers of the Earth (Crust,mantle,core),which