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LET'S EXPLORE The Earth

What's inside the Earth?

Each of the layers inside the Earth Each of the layers inside the Earth "popped out"The Earth has a thin rocky shell on the outside called the crust. Beneath the crust lie several layers. All of them are extremely hot. The first layer, the mantle, is made of rocks so hot they have partly melted. Below the mantle is the outer core. This is made of liquid metal. The inner core, at the Earth’s centre, is a solid ball of iron.

The Earth with a piece cut awayThe Earth with a piece cut away

Crust

The crust beneath the oceans is a thin layer of volcanic rock. It is no more than 10 kilometres (6 miles) thick. The crust beneath the continents is thicker. This is up to 70 kilometres thick (40 miles).


The crust is thinner in proportion to the whole Earth than the skin on an apple.

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