Across
- 3. This is a cause of burning fossil fuels like coal.
- 5. A machine used to create energy.
- 6. A synonym of petroleum.
- 8. Fossil fuels can be used to create this, a form of energy.
- 9. A highly abundant fossil fuel that is used to heat most homes.
- 10. A fossil fuel that is used in most businesses.
Down
- 1. The process of extracting material from the Earth.
- 2. A non-renewable resource that takes very little material to create a huge amount of energy.
- 3. A relatively cheap type of fossil fuel that is used in transportation around the world.
- 4. A non-renewable resource that forms from decayed, organic material.
- 7. Generators produce ______.