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Iron in the Earth's crust is solid.

The melting point of iron is 1811 K, 1538 °C, 2800 °F.

The temperature of the crust increases with depth to around 200 °C (392 °F) to 400 °C (752 °F) at the boundary with the mantle below. As depth increases further, so does temperature and pressure.

About 2800 kilometers below the Earth, the temperature is high enough that the outer part of the Earth's core is molten metal, an iron and nickle mixture. That is about 2000 kilometers thick and then it appears to become solid again at the very center.

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12y ago

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