Physical and chemical changes

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Across
  1. 3. flame Complete combustion in a bunsen burner produces
  2. 7. when dissolved in water releases OH- Ions
  3. 8. Precipitate is always
  4. 9. A substance turns red when universal indicator is added to it
  5. 10. A substance with pH 9
  6. 14. A chemical reaction between an acid and a base
  7. 15. A pure substance
Down
  1. 1. change Hammering a nail into wood
  2. 2. Glucose combines with oxygen in cells of our body to release carbon dioxide and energy
  3. 4. something that takes up the shape of the container
  4. 5. A chemical change responsible for changing the colour of iron
  5. 6. A yellow substance suspended in liquid upon mixing potassium iodide and lead nitrate
  6. 11. when dissolved in water releases H+ ions
  7. 12. flame Insufficient supply of oxygen in a bunsen burner produces
  8. 13. Colour of a neutral solution with universal indicator