Question

1. what is the primary source of earths internal heat besides radioactive decay? solar radiation chemical reactions gravitational energy magnetic fields

Explanation:

Solar radiation affects Earth's surface heat, not internal heat. Chemical reactions are not a primary source of Earth's internal heat. Magnetic fields do not contribute to Earth's internal heat. Gravitational energy from Earth's formation and density - related compression is a major source of internal heat besides radioactive decay.

Answer:

C. Gravitational energy