| Vocabulary word |
definition |
| resource | any supply that will meet a need |
| renewable resource | a resource that can be replaced in a reasonable amount of time |
| nonrenewable resource | a resource that cannot be replaced on the time scale of human history |
| fossil fuel | energy source formed from the remains of once living things from long ago |
| solar energy | energy from sunlight |
| hydroelectric | producing electricity by using the power of flowing water |
| geothermal | energy produced by thermal energy inside of Earth |
| biomass | remains of anything that lived recently |
