Question

What are the two source of heat in our planet?

Answer 1

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The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.

Answer 2

i think sun and volcano are the two source of heat in our planet