Year 8 Chemistry Revision

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Across
  1. 2. remains of plants or animals sometimes seen in sedimentary rocks (7)
  2. 3. can be hammered/bent into different shapes (9)
  3. 8. changes colour in acid and alkali solutions (9,9)
  4. 10. a word that describes what is made in a chemical reaction (8)
  5. 13. type of rock formed from cooled magma (7)
  6. 14. solution used to test for carbon dioxide gas (9)
  7. 16. the breakdown of rock into smaller pieces (10)
  8. 17. gas needed for a fuel to burn
  9. 18. what is formed when two or more different atoms bond together (8)
Down
  1. 1. when a lit splint is put into this gas a popping sound is heard (8)
  2. 3. type of rock formed by heating or compressing other rocks (10)
  3. 4. acid found in the stomach (12)
  4. 5. a reaction where a more reactive substance substitutes a less reactive substance from solution (12)
  5. 6. a poisonous gas formed by a car engine (6,8)
  6. 7. a blue substance containing copper, sulfur and oxygen (6,7)
  7. 9. a reaction between an acid and an alkali (14)
  8. 11. a substance made up of one type of atom (7)
  9. 12. a reaction where you burn a fuel (10)
  10. 15. the reaction of a metal with oxygen in the air (9)