Layers of The Earth - Inner Core, Outer Core, FAQs

The three layers of the Earth are crust, mantle and core.

We live on the uppermost surface of the Earth known as the upper crust.

The rocks in Earth’s crust are primarily basalts and granites. Basalts are grey or black, fine-textured, heavy rocks. Granites are not-so-heavy pink, grey or black rocks. The crust contains many other elements including sodium sodium, aluminum, potassium and iron.

The inner core mainly contains heavy iron, nickel with a mixture of melted rock.

The depth of the mantle is about 1,800 miles (2900 km).