| A | B |
| Energy | the ability to do work |
| Kinetic Energy | the energy an object has due to its motion |
| Potential Energy | energy that is stored as a result of position or shape |
| Gravitational Potential Energy | potential energy that depends upon an object's height above a reference point |
| Elastic Potential Energy | the potential energy of an object that has stretched or compressed |
| Mechanical Energy | the energy associated with the motion and position of everday objects |
| Thermal Energy | the total potential and kinetic energy of all the particles in an object |
| Chemical Energy | the energy that is sotred in chemical bonds |
| Electrical Energy | the energy associated with electric charges |
| Electromagnetic Energy | a form of enrgy consisting of changing electric and magnetic fields |
| Nuclear Energy | the enrgy stored in atomic nuclei |
| Energy Conversion | the process of changing energy from one to another |
| Nonrenweable energy resouces | a source of energy that exists in limited quanities and, once used, cannot be replaced except over the course of millions of years |
| fossil fuels | rich deposits of hydrocarbon mixtures that formed from the remains of organisms |
| renewable energy resources | a source of energy that can be replaced in relatively short period of time |
| hydroelectric energy | enrgy obtained from flowing water |
| solar energy | sunlight that is converted ino usable enrgy |
| geothermal energy | thermal energy beneath Earth's surface |
| biomass energy | the chemical energy stored in living things |
| hydrogen fuel cell | a cell that generates electricity from a controlled reaction between hydrogen and oxygen |
| energy conservation | the practice of fining ways to use less energy more efficiently |