| A | B |
|---|
| combustion | a chemical reaction in which a substance reacts with the oxygen in the air; also known as burning |
| oxygen | a colorless gas in air needed by humans and animals to live |
| magnesium oxide | — a white powder that is formed when magnesium reacts with the oxygen in the air; it has the chemical formula MgO |
| copper oxide | a black substance that is produced when copper reacts with oxygen in the air;it has the chemical formula CuO |
| kerosene | a liquid fuel produced from oil |
| fossil fuel | fuel containing carbon and hydrogen and originating from fossilized wood deposits, e.g. coal, gas, oil |
| water | a clear, colorless, odorless, and tasteless liquid with the chemical formula H2O |
| methane | a very flammable gas that is sometimes used as a fuel |
| *hydrocarbon | a substance that contains carbon and hydrogen; usually in reference to a fuel |
