Cycles in Biology

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Across
  1. 3. a heterotroph
  2. 4. an organism that feeds on another
  3. 5. the process that breaks sugars down to form carbon dioxide
  4. 7. two organisms that interact with each other
  5. 8. the number of one type of organism living within an ecosystem
  6. 9. the process that convert carbon dioxide into living matter
  7. 13. the relationship between two organisms that is beneficial for both organisms
  8. 15. (chosen by grade 11 students) according to the second law of thermodynamics this always increases in a closed system
  9. 17. an organism that only eats plants
  10. 18. a living factor with an ecosystem
Down
  1. 1. the number of different organisms living with an ecosystem
  2. 2. an organism that decomposes dead matter
  3. 3. (2 words) movement of carbon through an ecosystem
  4. 6. the non-living components of an ecosystem
  5. 10. the living and no-living components make up this
  6. 11. an organism that feeds on other animals
  7. 12. an autotroph
  8. 14. feeding level
  9. 16. the process that rhizobium bacteria use to convert atmospheric nitrogen into living nitrogen