text: There is no way to measure the temperature at the Earth's core\ndirectly.  We know from mines and drill holes that, near\nthe surface of the Earth, the temperature increases by about\n1 degree Fahrenheit for every 60 feet in depth.  If this\ntemperature increase continued to the center of the Earth, the\nEarth's core would be 100,000 degrees Celsius!\n\nBut nobody believes the Earth is that hot; the temperature increase\nmust slow down with depth and the core is probably\nabout 3000 to 5000 degrees Celsius.\n\nThis estimate of the temperature is derived from theoretical\nmodeling and laboratory experiments.  This work is very\ndifficult (and speculative) since nobody can reproduce\nin a laboratory the high temperatures and pressures that\nexist in the core.  Also it is not known exactly what\nthe core is made of.