Science

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Across
  1. 5. a scale used to measure the concentration of H+ ions in a solution
  2. 7. a solution made of a base/alkali and water
  3. 9. A biological catalyst
  4. 10. rain that has acid in it
  5. 11. a base dissolved in water
  6. 13. a substance that is used to stop heart burn
  7. 14. the term commonly used for sodium chloride
  8. 15. Where photosynthesis occurs
  9. 16. OH-, formed by bases
  10. 19. CO3
Down
  1. 1. A green pigment found in plants
  2. 2. A chemical reaction in which glucose is broken down,releasing energy for use by the plant or animal
  3. 3. the waxy waterproof coating of a leaf
  4. 4. A simple sugar formed by photosynthesis
  5. 6. a common indicator that turns red in the presence of an acid and blue in the presence of a base
  6. 8. a chemical reaction between a acid and a base
  7. 12. Single-celled organism that lives in water
  8. 16. H+, released by acids
  9. 17. A process in which chemicals move,caused by different chemical concentrations
  10. 18. a chemical that changes colour to show whether a substance is acidic,neutral or basic