Tobin - science crossword

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Across
  1. 4. it is a negative impact on the ecosystem
  2. 6. its the variety of plants and animals leaving in a area
  3. 7. living things that can make their own food using air,light,soil or water
  4. 8. an area that has previously been removed for example forest fires
  5. 9. balance that avoids depletion of natural resources
  6. 13. it is the cycle of life
  7. 14. a area were animals,plants and organisms work together
  8. 15. it is a positive impact on the ecosystem
Down
  1. 1. they finish were the scavengers have left off and keep on breaking it down
  2. 2. it is a primary succession
  3. 3. it is a living thing in a ecosystem
  4. 5. happens in lifeless areas were soil is not able to live anymore for example land slides
  5. 10. nonliving things in a ecosystem
  6. 11. animals that eat died animals or plants and break them down into small bits
  7. 12. eats other animals or plants
  8. 16. it is a secoundary succession