Ecosystems and Populations Crossword

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Across
  1. 1. something that can make its own food
  2. 6. ____ succession starts on bare rock, like after a volcanic eruption
  3. 7. a close relationship between two species where at least one benefits
  4. 8. something that consumes detritus for food
  5. 11. the physical environment where a species lives
  6. 12. the process of water returning to the atmosphere
  7. 14. something that determines the population growth of a region (no space)
  8. 16. the area underwater that experiences sunlight
  9. 17. ____ levels on a food web share the same energy sources
  10. 19. _____ factors are the living parts of the environment
  11. 20. something that needs to eat other living things for food
  12. 23. the process of an ecosystem changing over time
  13. 25. _____ diversity refers to the differences in the individuals of a species
  14. 26. the variety of life and its processes
  15. 27. ____ succession starts with soil, like after a forest fire
Down
  1. 2. the maximum population size that an ecosystem can support (no space)
  2. 3. the process of water falling from the atmosphere
  3. 4. average weather over a long period of time
  4. 5. an organism that harbors a parasite
  5. 9. symbiosis where one species benefits and one is unaffected
  6. 10. a final stable ecosystem resulting from succession (no space)
  7. 13. _____ factors are the nonliving parts of the environment
  8. 14. the distance north or south of the equator
  9. 15. something that eats dead soft tissue for food
  10. 18. ____ zones are sometimes underwater, and sometimes above water with the tides
  11. 21. the role of a species in its ecosystem
  12. 22. the study of how living things interact with each other and their environment
  13. 24. a worldwide group of similar ecosystems