Question

Some points on inside our earth class 7​

Answer 1

Answer:

The earth is made up of three concentric layers-crust, mantle and core. The uppermost layer over the earth's surface is called the crust. It is about 35 km thick on the continental masses and only 5 km thick on the ocean floor. It is made up of silica and alumina and thus called sial.

Answer 2

Answer:

The earth is made up of three concentric layers-crust, mantle and core. The uppermost layer over the earth's surface is called the crust. It is about 35 km thick on the continental masses and only 5 km thick on the ocean floor. It is made up of silica and alumina and thus called sial.

Explanation:

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