| A | B |
|---|
| Electric Generator | device for converting other forms of energy into electricity |
| Fossil Fuels | coal, oil, and natural gas - remains of organisms that lived millions of years ago |
| Nuclear Energy | energy that exists within the nucleus of an atom |
| Nuclear Fission | when subatomic bonds are broken apart and release huge amounts of energy |
| Nuclear Fussion | when lightweight atomic nuclei combine to form a heavier nucleus, releases huge amounts of energy |
| Solar Energy | energy from the sun |
| Passive Solar Heating | where sunlight is used to heat buildings directly, without pumps or fans |
| Active Solar Heating | structures that have a series or solar collectors that absorb solar energy and convert it to heat |
| Solar Cells | devices that convert the sun's energy directly into electricity |
| Geothermal Energy | the heat inside the earth |
