The Layers of the Earth

There are four layers of the Earth. The first layer (farthest away from the center of the Earth) is the crust. The crust is about 4 to 40 miles thick. Next is the mantle which is about 1,800 miles thick. After the mantle is the outer core. The outer core is about 1,300 miles thick. Last is the inner core which is about 1,500 miles thick. The inner core is also 1,200 miles in diameter. The crust is made up of a thin silicate rock material. The mantle is made up of a dark semi-liquid rock, rich in magnesium and silicon. Temperatures in the mantle can reach up to 6,692 degrees F, and 3,700 degrees C. The outer core is made up of a liquid molten core of nickel and iron. The inner core is made up of solid metal, iron. The inner core reaches 1,200 kilometers in diameter. The temperature of the core reaches temperatures hotter than the sun!

This picture shows the Earth's layers.