What makes the earths core so hot?

Answer 1

Heavy radioactive elements sunk to the center of the earth when it was molten because they were the most dense. Things like Uranium are responsible for the ongoing heat of the earth's core.

Answer 2

The Earth's core is hot because of the various sources of heat underneath the Earth's mantle. The most important source of heat is the continuous nuclear fission of elements that contribute largely to the high temperatures found in the core.

Answer 3

Most of Earth's interior heat is residual, a remnant of the processes of formation and layer separation. Other heat is derived from the decay of radioactive elements. Earth materials also act to insulate and retain the heat from remnant processes and decay of radioactive elements.

Answer 4

The heat present in the Earth is due to several factors.

The first source of heat is from the remnants of heat from impacts with planetesimals early in Earth's history. Impacts with large bodies such as these (including the impact which led to the formation of the moon) trapped the thermal energy of the collision in the surrounding rock of the planet, and may have been enough in certain circumstances to completely melt the early Earth.

The second source of heat is also a remnant of an early Earth event known as the Iron Catastrophe. With much of early Earth still molten, denser metals, particularly iron and nickel, migrated to the center of the planet. Tremendous amounts of frictional heat was created, enough to completely melt the planet once again.

The third source of heat in the Earth is from compression due to gravity.

The fourth and final source of heat in the Earth is from the decay of radioactive elements. This source of heat is gradually declining due the decreasing amounts of radioactive isotopes, the decrease being caused by the decay.

Answer 5

natural nuclear waste