Answer: The radiogenic heat produced by radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth.
7) left over from the formation of the Earth.
Ans) Asteroids left over from the formation or the Earth.
The heat can be transferred by three process namely 8) , 9) , and 10) .
Ans) The heat can be transferred by the three process 8) Conduction , 9) Convection, and 10) Radiation.
Explanation:
