Across
- 4. Iron becomes red when heated and this kind of change is ________
- 7. When paper is burnt this is produced
- 9. A reaction where iron replaces copper in copper sulphate to make iron sulphate
- 10. The presence of this gas along with water is needed for the rusting of iron
- 11. This chemical change takes place in the stomach and small intestine
Down
- 1. A process of depositing a layer of zinc on iron
- 2. A change in which one or more new substances are formed
- 3. The colour of copper sulphate
- 5. This chemical change takes place in the kitchen
- 6. This powder turns from yellow to red when exposed to sodium hydroxide
- 8. Everything in the universe is made up of tiny particles called ______