Science Week - Chemical Symbols

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Across
  1. 2. Blood sucking bug.
  2. 5. Sections of DNA.
  3. 7. pH less than 7.
  4. 8. Emails you don't want.
  5. 10. There are no snakes in this country.
  6. 13. Vertebrate that scares elephants.
  7. 15. Wearing away of land by weather.
  8. 19. Renaissance scientist who said the Sun was at the centre of the universe.
  9. 20. Trash Panda.
Down
  1. 1. A form of microorganism.
  2. 3. Cat-like.
  3. 4. Colours.
  4. 6. Fang teeth.
  5. 9. Can cause illness or death.
  6. 11. South American country.
  7. 12. Used to reduce friction.
  8. 14. Ghosts say ...
  9. 16. Drug made from willow bark.
  10. 17. Fruit high in potassium.
  11. 18. Needed to make haemoglobin.