| Term | Definition |
|---|
| fuel | a substance that provides energy as the result of a chemcial change |
| energy transformation | a change from one form of energy to another |
| combustion | the process of burning a fuel |
| fossil fuel | an energy rich substance (such as coal, oil, or natural gas) formed from the remains of organisms |
| hydrocarbon | an energy rich chemical compound that contains carbon and hydrogen atoms |
| petroleum | liqujid fossi fuel; oil |
| refinery | a factory in which crude oil is heated and separated into fuels and other products |
| petrochemical | a compound made from oil |
| When fuels are burned, the chemical energy that is released can be used to generate another form of energy, such as heat, light, motion, or electricity. | How do fuels provide energy? |
| Coal, oil, and natural gas | What are the 3 major fossil fuels? |
| Since fossil fuels takes hundreds of millions of years to form, they are considered nonrenewable resources. | Why are fossil fuels considered nonrenewable resources? |
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