Question

Where does the Earth’s internal heat come from?​

Answer 1

Explanation:

There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.

Answer 2

Answer:

There are three main sources of heat in the deep earth:

(1) heat from when the planet formed and accreted, which has not yet been lost;

(2) frictional heating, caused by denser core material sinking to the center of the planet; and

(3) heat from the decay of radioactive elements.