Question

List 3 reasons the Earth was hot when it first formed.​

Answer 1

Answer: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.

Step-by-step explanation:

Answer 2

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;
(3) the heat from the decay of radioactive elements.