Environmental Chemistry Crossword

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Across
  1. 3. Litmus at pH 6-8
  2. 5. DDT
  3. 13. The concentration of pesticides in higher levels of the food chain
  4. 14. A neutralization reaction that uses lime
  5. 16. Calcium carbonate
  6. 17. Papers with a combo of indicators to give a colour range that matches a pH range
  7. 18. Most food chains consist of_____trophic levels
  8. 19. Red litmus to blue
Down
  1. 1. Helps hydrocarbons combust better and release less pollution
  2. 2. DDT was invented by_______.
  3. 4. The pollutants from smokestacks and vehicle exhaust
  4. 6. Growing crops without the use of pesticides and commercial fertilizers
  5. 7. They attack and eat our food crops
  6. 8. The reaction between an acid and a base
  7. 9. DDT is_______as it moves up the food chain
  8. 10. Causes buildings and statues to corrode
  9. 11. Foods produced without chemical fertilizers, genetic modification,etc
  10. 12. Pests can become________to pesticides
  11. 15. Blue litmus to red