Structure of the earth

The earth structure it consists of the crust, Mantle and Core it consists of all kinds of rocks, soil and everything we see above the earth’s surface. The crust that is the land which we walk is almost three times thicker than the crust under the oceans. And it extend to about 25 miles. The earth’s crust floats on the layer which called the mantle it is made of thick, solid, rocky substance and amounts to about 85% of the total mass of earth.