| A | B |
|---|
| anthracite | hardest form of coal |
| bituminous coal | soft coal |
| carbonization | process in which plant materials are changed into carbon |
| crude oil | unrefined petroleum |
| fossil fuel | "fuel formed from the remains of living organisms, such as coal, petroleum, and natural gas" |
| gemstone | nonmetallic mineral that is brilliant and colorful when cut |
| geothermal energy | energy contained in and available from water heated by magma or gases within the earth |
| hydrocarbon | compound made up of atoms of carbon and hydrogen |
| hydroelectric energy | energy produced by running water |
| lignite | brown coal |
| lode | deposit formed by thick mineral veins |
| nonrenewable resource | substance of limited supply that cannot be replaced |
| nuclear fission | splitting of the nucleus of a larger atom into smaller nuclei |
| nuclear fusion | combination of the nuclei of smaller atoms to form a larger nucleus |
| ore | deposit of minerals from which metals and nonmetals can be profitably removed |
| peat | brownish-black material produced by partial decomposition of plant remains |
| petrochemical | chemical derived from petroleum |
| placer deposit | fragments of native metals that are concentrated in layers at the bottom of a stream bed |
| renewable resource | substance that can be replaced |
| solar collector | device for capturing solar energy |
| vein | narrow band of mineral deposits in rock |
