The more massive the object, the more kinetic energy it has. Radiative Energy Radiation is often used as a synonym for light. The most valuable source of radiative energy for life on Earth is the Sun. Thermal energy, or the energy of heat, is actually a form of kinetic energy since all the individual particles in a warm substance are moving. The temperature measures the average kinetic energy of the moving particles, while the total thermal energy content depends on both the temperature and the density of particles.
Potential energy takes many different forms.
Gravitational potential energy is the potential energy of objects that, if released, will fall toward a center because of gravity. Conservation of Energy One of the most important laws of nature is the law of conservation of energy, which states that energy can neither be created nor destroyed. It can only be converted form one form to another. You will find out that it explains why asteroids make huge craters when they hit the Earth or other solid body, why Jupiter is still warm, the source of Saturn's internal heat, even why the Earth is getting warmer. The nucleus is very tiny compared to the cloud of electrons.