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Across
  1. 2. the role that a species fills in its habitat
  2. 8. animals that hunt and kill others animals for food
  3. 9. populations of different species that interact within an area
  4. 12. animals that obtain their energy by eating other animals; see also consumers and heterotrophic
  5. 13. organisms that eat both plants and animals
  6. 14. an organism that eats only plants
  7. 17. members of the same species in an ecosystem
  8. 19. a relationship where two organisms live together long term for the benefit of at least one organism benefits
  9. 20. the organism that is harmed in a parasitic relationship
  10. 21. describes the non-living parts of an organism's environment
  11. 23. the place or environment where a plant or animal naturally or normally lives and grows
  12. 25. animals that are hunted and become food
  13. 26. the replacement of one kind of community by another in an ecosystem
  14. 27. the remains of dead organisms that are broken down into simpler compounds and returned to the ecosystem
  15. 29. web the complex, interconnecting food chains in a community
Down
  1. 1. organisms that obtain their energy by feeding on other organisms; heterotrophic life-forms
  2. 3. the struggle between organisms for limited resources such as food and space
  3. 4. green plants and other autotrophs
  4. 5. pyramid describes the flow of energy through an ecosystem; most energy is at the base (producers) and decreases at each higher level (consumers)
  5. 6. energy energy that comes from the sun
  6. 7. the organism that benefits in a parasitic relationship
  7. 9. capacity the size of a particular population that an ecosystem can support
  8. 10. heterotrophic organisms that obtain their energy by feeding on decaying organisms
  9. 11. animals that feed on the remains of a dead animal that they themselves did not kill
  10. 15. an area that contains all living and non-living parts that interact
  11. 16. describes the living parts of an organism's environment
  12. 18. chain the direct transfer of energy from one organism to the next
  13. 22. a very large area characterized by a certain climate and types of plants and animals
  14. 24. the variety of different species in an ecosystem or in the world
  15. 28. the study of the interactions of living things with their environment