Across
- 1. A change that is not permanent and where no new substances are formed.
- 4. The chemical reaction between a fuel and oxygen.
- 5. Combustion is a chemical one of these which releases energy.
- 9. This cannot be created or destroyed and is released as heat during combustion.
- 10. Fuel resources that can be replaced and will not run out.
- 11. Non-renewable fuels formed from the remains of living things.
- 12. Carbon dioxide is an example of this type of gas which is a byproduct of combustion.
- 13. A renewable fuel resource that can be replaced.
- 14. The gas in the atmosphere that fuels react with to burn.
Down
- 2. The type of combustion that occurs when the supply of oxygen is plentiful.
- 3. Fuel resources that cannot be replaced once they are used up.
- 6. A change that occurs when a new substance is made.
- 7. An element found in all living things and the building block of nearly everything on the planet.
- 8. The amount of energy released per unit mass of a fuel when it is burned.
- 11. A substance that is combusted in order to release energy.