Layers of the Earth in 3D

Pick a layer to highlight it and read what it is made of, how hot it is and whether it is solid or liquid.

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Questions students ask

Which layer of the Earth is liquid?

The outer core, made of liquid iron and nickel. Its movement creates the Earth's magnetic field.

How do we know the structure of the Earth?

From seismic waves: S-waves cannot travel through liquids, so the S-wave shadow zone shows the outer core is liquid.

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