Key Terms Crossword Puzzles

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Across
  1. 2. an organism that is killed and eaten by another organism
  2. 3. pyramid a triangular diagram that shows an ecosystem’s loss of energy
  3. 6. an area of land that is periodically underwater or whose soil contains a great deal of moisture
  4. 8. describes living factors in the environment.
  5. 9. an organism that kills and eats all or part of another organism
  6. 10. the study of the interactions of living organisms with one another and with their environment.
  7. 12. the part of Earth where life exists.
  8. 14. an organism that eats animals.
  9. 18. capacity the largest population that an environment can support at any given time.
  10. 21. a relationship between two organisms in which one organism benefits and the other is unaffected
  11. 25. a relationship in which two different organisms live in close association with each other
  12. 26. zone the zone of a pond or lake that extends from the littoral zone and that is only as deep as light can reach
  13. 27. a lot of people.
  14. 28. interacting organisms and their physical environment.
  15. 30. a group of organisms of the same species that live in a specific geographical area.
  16. 32. vegetation consisting chiefly of tangled shrubs and thorny bushes.
Down
  1. 1. A dry place
  2. 4. an organism that eats both plants and animals.
  3. 5. a large region made by a type of climate
  4. 7. zone the shallow zone of a lake or pond where light reaches the bottom and nurtures plants
  5. 11. a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed
  6. 13. the microscopic, photosynthetic organisms that float near the surface of marine or fresh water
  7. 15. an area where fresh water mixes with salt water from the ocean
  8. 16. a relationship between two species in which both species benefit
  9. 17. a treeless wetland ecosystem where plants such as grasses grow
  10. 19. an organism that eats only plants.
  11. 20. zone the zone of a lake or pond below the open-water zone, where no light reaches
  12. 22. a large open area of country covered with grass
  13. 23. chain the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms
  14. 24. describes the nonliving part of the environment, including water, rocks, light, and temperature.
  15. 29. a wetland ecosystem in which shrubs and trees grow
  16. 31. a treeless plain found in the Arctic