| A | B |
|---|
| oil | think black liquid formed from buried remains of microscopic marine animals |
| Natural Gas | forms in same way as oil and often found with oil, but it forms in a gaseous state |
| peat | a layer of organic sediment made of decaying plant material |
| lignite | peat that has been buried under more sediment but carbon is more concentrated than in peat and it releases more heat energy than peat |
| bituminous coal | buried deeper than peat or lignite, it is a soft coal. It is compact, black, and brittle and releases lots of heat energy, but it pollutes the environment |
| anthracite coal | highest amount of carbon and is cleanest burning of all coal. |
| fossil fuel | fuels such as coal, oil, and natural gas that form from the remains of decaying plants or animals |
| reserve | the amount of fossil fuel that can be extracted at a profit |
| nuclear energy | an alternative energy source produced from atomic reactions using uranium |
