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Radioactive decay of natural elements (Uranium is a big one) releases a large amount of energy, this energy heats up the earth. These elements are in the crust (underground) the mantly and the core. So the warmth they produce keeps the earth warm. Without this, the core would have cooled down and solidified by now.

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Q: How has radioactive decay warmed the earth from the inside?
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Water from a natural hot spring is warmed by what inside the earth?

It is warmed by geothermal energy which is created by RADIOACTIVE DECAY http://en.wikipedia.org/wiki/Geothermal_(geology)


How is it that radioactive decay has always warmed the earth from the inside and nuclear fusion has always warmed the earth from the outside?

That's because of where each of these processes occur. There is no nuclear fusion inside of Earth. There is probably a small amount of radioactive decay in the Sun, but the power produced by it is insignificant, compared to the huge amount of power produced by nuclear fusion.


Explain how radioactive decay has always warmed the earth from the inside and how nulear fusion has always warmed the earth from the outside?

The Earth's core contains many radioactive elements within its core that emit warmth as they decay, keeping the core of the Earth hot and heating it from within. Meanwhile, the sun is a product of the nuclear fusion of hydrogen into helium and its rays warm the Earth's crust from outside.


What is the process that creates motion inside the earth?

The answer here would be Radioactive Decay.


What is the source of heat in the Earth's interior?

The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.


What is the source of heating in the mantle?

Source of heat in mantle come from radioactive decay of the radioactive elements inside the earth..


What is the source of heat in the Earth interior?

The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.


What decay causes geothermal energy?

Naturally occurring radioactive decay deep inside the Earth creates geothermal energy.


Where does volcanoes and geysers get their heat energy from?

From the inside of the Earth, which is fairly hot. The Earth gets its heat from radioactive decay.


How does earth get all its energy?

idk :D


How come geothermal is found in the Earth?

Geothermal heat energy from inside the earth is caused by the radioactive decay of Uranium in the mantle.


What is the heat energy from inside of the earth?

"geothermal" (the source is a combination of original impact energy and radioactive decay.)