Which of the following powers the Earth's internal heat engine?

Question

Quizplus · Accepted Answer

Both radioactivity and heat trapped during the formation of the Earth power the Earth's internal heat engine. Radioactive decay of elements such as uranium, thorium, and potassium produces heat, which along with the leftover heat from the formation of the Earth, drive the geological processes such as plate tectonics, volcanism, and the creation of the Earth's magnetic field.

Which of the Following Powers the Earth's Internal Heat Engine