| A | B |
|---|
| biomass | the remains or wastes of plants and animals |
| energy | the ability to do work |
| fission | the splitting of an atom's nucleus |
| fossil fuel | an energy source formed from dead organisms |
| geothermal energy | energy from heat trapped inside the earth |
| hydroelectric power | electricity produced by capturing the energy of flowing water |
| nonrenewable resource | source of energy not replaceable within a person's lifetime |
| nuclear energy | the energy locked up in the nucleus of an atom |
| recycle | to use again |
| renewable resource | source of energy that can be easily replaced |
| solar energy | energy from the sun |
| tidal energy | energy from rising and falling sea water |
