Interior Of The Earth

You might have noticed that an onion has several layers.

Just like the onion our Earth also has layers with one inside the other.

The three layers of the earth are Crust, Mantle, and Core.

Let us discuss these layers of the Earth one by one.

Crust

The crust is the uppermost and thinnest layer of the earth's surface. It has only 1% of the total Earth mass.

The crust has a width of 35 km on land and only 5km on the ocean floor.

The main minerals found in the land crust are Silica and Aluminum. Combinedly they are represented as Sial.

The main minerals found in the ocean crust are silica and magnesium. Combinedly they are represented as Sima.

Mantle

The second layer of the Earth is called Mantle. It is present just below the Crust.

The mantle extends up to a depth of 2900 km below the crust.

The mantle is made up of rocks and is the most massive layer. It alone makes 84% of the Earth's mass.

Inner planets, some asteroids, and some planetary moons have the mantle layer.

Core

The layer below the Mantle is called Core. It is further divided into Outer Core and Inner Core.

The Core has a radius of about 3500 km. It makes up 15% of Earth's mass.

The major minerals of the core are nickel and iron. Combinedly these are represented as nife.

The temperature and pressure of the central core is very high.

Revision

The Earth is made up of 3 layers. The Crust, Mantle, and Core.

The Crust is the uppermost and thinnest layer of the earth's surface.

While the majority of the land crust has Sial, the ocean crust has Sima.

The second layer of the Earth is Mantle. It is made of rock and makes up to 84% of Earth's weight.

The third layer of the Earth is called Core. It has 15% of Earth's weight and the majority of it has Nickle and Iron.

The central core has a very high temperature and pressure.

The End