Four Main Layers of the Earth

The planet Earth comprises several layers. Starting from the Earth's surface, there are four main layers; namely, the crust, the mantle, the outer core and the inner core. The pressure and temperature increases tremendously from the outer layers to the inner layers. Let's take a look at each of them individually.

The crust or the lithosphere is the outermost layer of the Earth made up of silicate rock materials.percent of the Earth and is the thinnest layer in comparison to the other three layers. The thickness and the composition of the Earth's crust vary in the land and the ocean.
The crust makes up only about one Most earthquakes occur in the Earth's crust.whereas, the oceanic crust measures about 10 kilometers and the continental crust is about 32 kilometer thick and composed of lighter materials like granite, is mostly made up of basalt.