Across
- 1. The things that react together in a reaction
- 3. This change is reversible
- 5. Which side of the fire triangle is taken away by water?
- 6. a substance which contains energy that is released by burning is called a...
- 7. You might see this given off in a chemical reaction
- 9. Another word for irreversible
- 11. A substance that is made only of hydrogen and carbon is called a...
- 14. This is the product of combustion that you can drink
- 16. Iron + oxygen --> ?
Down
- 2. This change always produces a new substance
- 3. Something that is produced at the end of a chemical reaction
- 4. This turns cloudy when mixed with carbon dioxide
- 8. This is the product of combustion that you cannot drink
- 10. Burning is also known as...
- 11. You hear a squeaky pop when this substance burns
- 12. During a reaction chemicals may split up or ...
- 13. This word means something that can go back
- 15. The three things needed for a fire to burn are fuel, heat and ...