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Inner Core

The Inner Core is the final layer of the Earth.  It is a solid roughly sepherical ball made of metal.

Thickness

    The Inner Core is about 1250 km thick and is the second smallest layer of the Earth.  Although it is one of the smallest, the Inner Core is also the hottest layer.

Composition

    The Inner Core is a solid ball composed of an element named NiFe.  Ni for Nickel and Fe for Ferrum also known as Iron.  

Temperature

    The Inner Core is about 5000-6000 degrees Celsius.  It melts all metal ores in the Outer Core causing it to turn into liquid magma.

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