PHYSICAL AND CHEMICAL CHANGES

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