| Term | Definition |
|---|
| renewable energy | energy from sources that are constantly being formed |
| passive solar energy | when the sun's energy directly heats something |
| active solar energy | when the sun's energy is collected and is used to heat water or buildings |
| biomass fuel | when plant materials, manure and any other organic matter is used to produce energy |
| hydroelectric energy | energy that is produced by moving water |
| geothermal energy | used energy that comes from the earth's heated crust |
| alternative energy | energy sources that still under development |
| OTEC | ocean thermal energy conversion |
| fuel cell | anything that produces energy (electical) from a chemical reaction |
| energy efficiency | percentage of energy put into a system that is useful |
| energy conservation | a means of saving energy |
Combine with other sets
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