Question

What are the 3 layers of the earth and write its definition?

Answer 1

There are Three types of earth's layer. That are stated below : -


1) Crust : -

Its the upper part of the layer which consists of soil, tree's roots, rocks, etc. Its the first layer of the earth of thickness of 18 km and from sea surface its thickness 5 km.


2) Mantle : -

Its the second layer of the earth. its is situated below the crust. The mantle is the mostly-solid bulk ofEarth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume.

3) Core : -

Its the last layer of the earth. The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres, which is about 70% of the Moon's radius. It is composed of an iron–nickel alloy and some other elements.

Answer 2

Earth can be divided into three main layers

1. The core

Earth is made up different layers where each layer has a unique characteristic. Earth has a core which has two distinct parts inner core and outer core. Iron and nickel constitutes whole part of core in molten form.

2. The mantle  

Mantle is found while sitting at the top of the outer core. Mantle is divided into two portions upper mantle and lower mantle  

3. The crust.  

The crust is contained in the lithosphere where it is divided in to two parts oceanic crust and continental crust.