Describe the internal structure of the earth with its layers

1.	Describe the internal structure of the earth with its layers
Answer» The Earth is made up of several layers one inside the other, just like an onion. Following are the main layers of the Earth:Crust\tThe crust is the uppermost layer found on the surface of the Earth.\tIt is the thinnest of all the layers and is about 35 km on the continental masses and only about 5 km on the ocean floor.\tTwo main mineral constituents of the continental mass are silica and alumina. Therefore, continental crust is also called\xa0sial.\tThe oceanic crust consists mainly of silica and alumina. Therefore, it is known as\xa0sima.Mantle\tThis layer of the Earth lies underneath the crust.\tIt extends up to a depth of 2,900 km below the Earth’s crust.\xa0Core\tIt is innermost layer of the Earth with a radius of about 3500 km.\tIt is called nife as it is made up of nickel and iron (ni-nickle; fe-ferrous or iron).\tThere is very high temperature and pressure inside the Earth’s core.

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