| A | B |
|---|
| Fossil Fuel (Coal) | Energy source derived from the remains of organisms that lived millions of years ago |
| Hydrogen | A clean-burning gas derived from water |
| Wind | Inconsistent energy source |
| Geothermal Energy | Drawn from heat within the Earth |
| Nuclear Fission | The breaking of the bonds holding together subatomic particles in large atoms |
| Nuclear Fusion | The combining of the nuclei of small atoms to make a larger nucleus |
| Passive Solar Heating | Heating a home with south-facing windows and thick stone wall |
| Active Solar Heating | Heating a home by pumping water warmed by the sun |
| Hydroelectricity | Energy generated by falling water |
| Biomass | Organic matter in plants or plant products like wood, trash, or crops used to produce energy |
| Electric Generator | Works by moving an electrical conductor, such as metal wires, through a magnet |
| Nuclear Energy | Energy that exists within the nucleus of an atom |
