Maharashtra Class 8 Answered
Diagram of interior of the earth and explanation of the interior of the earth
Asked by pshirode24 | 07 Aug, 2020, 02:42: PM
Expert 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
- The crust is the uppermost layer found on the surface of the Earth.
- It 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.
- Two main mineral constituents of the continental mass are silica and alumina. Therefore, continental crust is also called sial.
- The oceanic crust consists mainly of silica and alumina. Therefore, it is known as sima.
Mantle
- This layer of the Earth lies underneath the crust.
- It extends up to a depth of 2,900 km below the Earth’s crust.
Core
- It is innermost layer of the Earth with a radius of about 3500 km.
- It is called nife as it is made up of nickel and iron (ni-nickle; fe-ferrous or iron).
- There is very high temperature and pressure inside the Earth’s core.
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