The structure of planet Earth consists of four distinct layers.

The outermost layer consists of hard, rocky crust. It floats on top of a molten mantle. The innermost part of the planet is known as the core.

Based on research, we know that the core can be divided into two parts. The outer core consists of molten material, whereas the inner core consists of solid metals. 

Planet Earth's crust consists of various plates. The borders between different plates are shown in red.

Earth's crust consists of smaller parts known as plates. Because of this, the planet's crust resembles a cracked egg shell.

The borders of different plates are full of activity. Depending on the flow of the molten material in the mantle beneath them, the plates can move away from one another, collide with one another or submerge below one another. These movements result in earthquakes and tsunamis. 

When molten rock erupts through the planet's crust, the result is a volcano. When molten rock is found under the ground, it is called magma, whereas when it is found on the surface of the planet, it is known as lava. Slow volcanic eruptions are beautiful, whereas strong volcanic eruptions are dangerous.