<P> The flow of heat from Earth 's interior to the surface is estimated at 47 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 the Earth . </P>
<P> The flow of heat from Earth 's interior to the surface is estimated at 47 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 the Earth . </P>
where does most of earths heat come from
where does most of earths heat come from
radiogenic heat primordial heat
radiogenic heat primordial heat