DMPQ: Describe the interior of the earth and its composition.

Crust: The outer most layer or shell of the earth is known as earth’s crust. On an average it is

30km deep. It can be up to 70km under high mountains and up to 8km under ocean. It

represents less than 1% of earth’s total volume and its average density is 2.7 gm/cm3. It is

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