| A | B |
| Chemical potential energy | The energy store in the chemical bonds of a compound; can be released by processes such as combustion or digestion. |
| Electromagnetic radiation | Wavs (or photons) of pure energy at any wavelength in the electromagnetic spectrum. |
| Electromagnetic spectrum | The entire range of wavelengths of electromagnetic radiation from long wavelength radio waves to short wavelength X-rays and gamma rays. |
| Energy | One of the basic constituents of the universe, the others being matter and intelligence. |
| Fission | A nuclear chain reaction in which neutrons shatters the nucleus of a heavy element, producing nuclear fragments and addition free neutrons that shatter other nuclei. |
| Fusion | A clear reaction in which two hydrogen nuclei (protons) fuse together to form a helium nucleus, releasing energy in the process. |
| Gravitational potential energy | Stored energy due to an object's location in a gravitational field. |
| Heat | Energy in transit from a warm body to a cooler one, by means of infrared, thermal conduction, or convection. |
| Hydroelectric power | The generation of electricity by damming water and allowing the water behind the am to fall through a turbine-generator system. |
| Kinetic energy | Energy an object possesses by virtue of its motion. |
| Mass | The variable used to quantify the amount of inertia in an object. |
| Nuclear energy | The use of controlled nuclear fission to produce steam which can then power a turbine and generate electricity. |
| Photon | A single quantum of electromagnetic energy. |
| Photovoltaic cell | A semiconductor device that converts light into electrical signals. |
| Potential energy | Energy that is stored and can be released by conversion into a different form of energy. |
| Quantum | A single packet of energy. |
| Quantized | Divided into discrete lumps or packets; non-continuous. |
| Solar cell | A semiconductor device that can convert the energy in sunlight into electricity. |
| Thermal energy | Energy an object possesses after being heated. |
| turbine | A system of blades mounted on a rotating shaft such that when steam, water or air flows past the blades the shaft turns. |
| Visible spectrum | The portion of the electromagnetic spectrum that we can sense with our eyes through the colors red, orange, yellow, green, blue and violet. |
| Wavelength | The spatial separation between the peaks of a wave. |
| Wave packet | A synonym for photon. |