Environment Crossword Of Squeak

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Across
  1. 1. a mixture of plant compounds used as a chemical indicator
  2. 5. a fragrant natural oil used as an insect repellent and in perfume and soap manufacture
  3. 7. storage of unused chemical energy
  4. 9. a substance that is toxic to plants, used to destroy unwanted vegetation
  5. 10. found in salt
  6. 12. crucial part of red blood cells that regulates oxygen
  7. 13. short for dichlorodiphenyltrichloroethane
  8. 14. a chemical used to control molds or fungi
  9. 16. has a PH value of more than 7
Down
  1. 1. obtained by heating limestone and which combines with water with the production of heat.
  2. 2. found in bananas
  3. 3. uses a sorbent to reduce oxide emmissions
  4. 4. forms bones and teeth
  5. 6. an invertebrate animal of the large phylum Arthropoda, such as an insect or crustacean.
  6. 8. helps regulate water balance
  7. 11. major part of thyroid hormones, which regulate metabolism
  8. 15. pennies were made out of this
  9. 17. has a PH value less than 7