| A | B |
|---|
| biomass energy | renewable energy derived from burning organic materials such as wood and alcohol |
| coal | sedimentary rock formed from decayed plant material; the world's most abundant fossil fuel |
| fossil fuel | nonrenewable energy resource, such as oil and coal, formed over millions of years from the remains of dead plants and other organisms |
| geothermal energy | inexhaustible energy resource that uses hot magma or hot, dry rocks from below Earth's surface to generate electricity |
| hydroelectric energy | electricity produced by water power using large dams in a river |
| mineral resource | resources from which metals are obtained |
| natural gas | fossil fuel formed from marine organisms that is often found in tilted or folded rock layers and is used for heating and cooking |
| nuclear energy | alternative energy source that is based on atomic fission |
| oil | liquid fossil fuel formed from marine organisms that is burned to obtain energy and used in the manufacture of plastics |
| ore | deposit in which a mineral exists in large enough amounts to be mined at a profit |
| recycling | conservation method in which old materials are processed ot make new ones |
| reserve | amount of a fossil fuel that can be extracted from Earth at a profit using current technology |
| solar energy | energy from the Sun that is clean, inexhaustible, and can be transformed into electricity by solar cells |
| wind farm | area where many windmills use wind to generate electricity |
