Across
- 2. chemical reaction between metal in air/water in which the metal is 'eaten away'
- 3. another term for burning
- 5. chemical reaction in which an acid reacts with a base to produce water and a salt
- 7. change of state from liquid to gas
- 9. chemical reaction involving the combination of oxygen with a fuel to produce heat energy
- 11. re-ignition of a fire due to the introduction of oxygen
Down
- 1. solid formed during a chemical reaction making a solution appear cloudy
- 4. catalysts in living things are called ...................
- 6. the process of coating iron with zinc to protect it from rusting
- 8. this substance combines with iron to form rust
- 10. substance that contains a positive metal ion and a negative non-metal ion
- 12. substances which have a positive hydrogen ion