Formation of Earth’s Core

The formation of earth's core takes place over 4 billion years ago. At first, the planet was covered with liquid magma. As time passed, the magma solidified and formed the crust of our planet. Over millions of years, the molten material cooled down and became dense enough to hold its shape. Eventually, the outer layer of the planet began to cool and solidify. This process continued until the inner core of the planet was formed.

Inner core:

It is the largest portion of the earth's interior and is located between the mantle and the outer core. It is about 1,400 miles (2,300 km) deep, and is approximately 5,000 times larger than the moon.

Outer core:

The outer core is composed of liquid metal. It is believed that the outer core may have a temperature of around 2,500 degrees Fahrenheit (1,370 degrees Celsius).

Mantle:

It is composed of silicate rocks, including peridotite, granite, basalt, and olivine. The mantle is about 6,000 miles (9,600 km) thick.

Crust:

It is composed of igneous rocks, sedimentary rocks, and volcanic rocks. The crust is less than 100 miles (160 km) thick.

Surface:

The surface is the layer of the earth that we live on. It is composed of water, air, land, and ice.

Core-mantle boundary:

The core-mantle boundary is where the outer core meets the mantle. Scientists believe that the core-mantle boundary moves slowly towards the center of the planet.