metal ores

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Across
  1. 6. can be used to identify substances or separate colours in ink
  2. 8. large scale distillation, used to separate fractions in crude oil
  3. 9. molecule made of only hydrogen and carbon atoms
  4. 12. substance made from two or more different elements or compounds
  5. 13. only one type of atom
  6. 15. used to separate liquids by their boiling points
Down
  1. 1. used to seperate solutes from the liquid
  2. 2. adding a small amount of chlorine to kill bacteria in water
  3. 3. large particles settling to the bottom of water
  4. 4. used to separate solids and liquids
  5. 5. name for water that is safe to drink
  6. 7. used to separate smaller particles from water
  7. 10. substance that only contrains one type of element or compound
  8. 11. two or more substances that are chemically combined
  9. 14. two or more substances not chemically combined