The temperature of earth crust is not constant and it changes with the depth of the earth. As depth of the earth crust increases, the temperature of earth crust increases. The range of temperature of earth crust is from 500 °C (900 °F) to 1,000 °C (1,800 °F). It is found that an increase of 30°C (about 50°F) in temperature occurs after one kilometer depth of the earth.
