Across
- 5. These reactions release energy.
- 8. This is present in any combustion reaction.
- 9. A type of energy source.
- 10. These reactions absorb energy.
- 11. Substances that are produced in a reaction.
Down
- 1. Chemical element 'C'.
- 2. This gets released in a combustion reaction.
- 3. Chemical compound written as 'H2O'.
- 4. A type of energy product in a combustion reaction.
- 6. A substance that undergoes change during a chemical reaction.
- 7. The process of burning.