The heat energy that powers tectonic activity on the surface of Earth originates deep in Earth's core.What is the main reason Earth's core does not cool rapidly as a result?

Question

Quizplus · Accepted Answer

Radioactivity in the core and lower mantle provides additional heat, which helps to maintain the temperature of Earth's core and prevent it from cooling rapidly. This heat is generated by the decay of radioactive isotopes, such as uranium and thorium, which are present in the core and lower mantle. This process releases large amounts of heat energy, which helps to maintain the heat balance in Earth's core. Convection and conduction also play a role in returning some heat energy to the core from the upper mantle, but they are not the main reason that the core does not cool rapidly.

The Heat Energy That Powers Tectonic Activity on the Surface