Geothermal energy comes from radioactivity in the rocks produced by the heat of the Earth's core. It is renewable.
Nuclear energy is when large nuclear atoms hat contain chemial energy are split to produce useful heat energy. It is renewable.
Nuclear fusion is when Hydrogen atoms in the sun are broken into pieces, which smash into each other at high speeds. This makes the pieces of Hydrogen atoms join together and form helium. Each time this happens, some mass is lost tha reappears as energy. (non-renewable)
Nuclear Fission is when an atom of Uranium-235 or Plutonium-239 is bombarded with slow moving neutrons. The nuclei absorb…