Biology Ch. 13

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Across
  1. 3. all of the organisms as well as the climate, soil, water, rocks, and other nonliving things in an area
  2. 4. the process by which an organism forms carbohydrates using chemicals as an energy source
  3. 6. a sequence that links species by their feeding relationships
  4. 8. a consumer that primarily eats one specific organism or a small variety of organisms
  5. 9. the study of the interactions among living things
  6. 12. a major regional or global community of organisms
  7. 15. organisms that eat both plants and animals
  8. 16. organisms that eat only animals
  9. 17. detritivores, or organisms that eat dead organic matter, that break down organic matter into simpler compounds
  10. 18. the water cycle
  11. 20. a measure of the total dry mass or organisms in a given area
  12. 22. a process in which certain types of bacteria convert gaseous nitrogen into ammonia
Down
  1. 1. organisms that get their energy from nonliving sources and make their own food
  2. 2. a species that has an unusually large effect on its ecosystem
  3. 5. the movement of a particular chemical through the biological and geological parts of an ecosystem
  4. 7. organisms that eat only plants
  5. 10. a diagram that compares energy used by producers, primary consumers, and other trophic levels
  6. 11. the variety of living things in an ecosystem
  7. 13. a consumer that has a varying diet
  8. 14. organisms that get their energy by eating other living resources
  9. 19. a group of different species that live together in one area
  10. 21. a model that shows the complex network of feeding relationships and the flow of energy an ecosystem