HKDSE Geography/M1/The Earth's Layers

The various layers of Earth are summed up below:

Crust
The crust is a solid layer on the earth's surface. It includes continental and oceanic crusts.

Mantle
It is denser, made of aluminium and iron, and divided into three parts.

Core
It is rich in iron and nickel. The outer core is a molten liquid. The inner core is a high-pressure solid.