| A | B |
|---|
| The use of a windmill to drive an electric generator | wind power |
| A mixture of gasoline and alcohol that is used as a fuel | gasohol |
| The joining of two or more nuclei to form a larger nucleus | fusion |
| The energy produced by heat within Earth | geothermal energy |
| The energy released by a fission or fusion reaction | nuclear energy |
| The energy released when a chemical compound reacts to produce new compounds | chemical energy |
| A process in which the nuclei of radioactive atoms are split | fission |
| The energy received by the Earth from the sun in the form of radiation | solar energy |
| Organic matter that can be a source of energy | biomass |
| Electrical energy produced by falling water | hydroelectric energy |
