The rate of temperature rise from the surface of the earth to the center is 1° Celsius per 32 meters. Due to the increase in temperature, all the substances under the earth?s interior should be in the molten state, but in fact, this does not happen. Due to increasing pressure with depth, the melting point of the rocks, and the rate of rise in the temperature decreases towards the center of the earth from a certain point beneath the surface. According to this calculation, the temperature in the center of the Earth is more than 2000°C.