Biology Crossword

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Across
  1. 3. number of different species in the biosphere
  2. 4. gray-brown haze in the atmosphere
  3. 6. rain containing nitric sulforic acid
  4. 7. process caused by a combination of performing practices
  5. 8. destruction of forest
  6. 10. increasing consentration of a harmful substance at higher trophic levels and a foodchain
  7. 15. cannot be replenished by natural process
  8. 17. harmful material that can enter the biosphere
  9. 18. farming stragedy in which large fields are planted with a single crop]
  10. 19. wise management of natural resources
  11. 21. species whose population size is rapidly declining
  12. 23. a permanent marking on the body
  13. 24. plants and animals that have migrated to places where they are not native
Down
  1. 1. the raising of aquatic organisms
  2. 2. disappearance of species
  3. 3. using natural resouces at a rate that does not deplete them
  4. 5. the sum total of the variety of organisms in the biosphere
  5. 9. splitting of ecosystems into small fragments
  6. 11. atmospheric layer in which ozone gas is relativly concentrated
  7. 12. practice of farming
  8. 13. something that leaps across lilypads
  9. 14. sticky and sweet
  10. 16. development of highly productive crop strains
  11. 20. place of learning
  12. 22. something baked with redsauce on top