Question

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

Explanation:

The Earth's internal heat sources include radioactive decay and gravitational energy. Gravitational energy from the formation of the Earth and density - driven convection contributes to the internal heat. Chemical reactions do not significantly contribute to Earth's internal heat on a large scale. Magnetic fields are not a source of internal heat. Solar radiation affects the Earth's surface and atmosphere, not the internal heat.

Answer:

D. Gravitational energy