Earth's two chief energy sources for all of its heat and geologic processes are .
A) wind and ocean currents
B) oil and coal
C) tidal forces and wind
D) external solar radiation and internal decay of naturally radioactive elements

Question

Quizplus · Accepted Answer

Earth's primary sources of energy are external solar radiation, which drives the atmosphere, weather, and climate, and the internal decay of radioactive elements, which heats the planet's interior, driving geologic processes such as plate tectonics and volcanism.

Earth's Two Chief Energy Sources for All of Its Heat