Ecology and Ecosystems

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Across
  1. 2. living things in an ecosystem
  2. 5. all of the water on, under, or around the Earth
  3. 7. the number of organisms of a certain species within an ecosystem
  4. 8. populations of different species make up a _____________
  5. 9. taking personal responsibility for the management and care of something
  6. 11. ecosystems that have not been planned or maintained by humans
  7. 13. nonliving things in an ecosystem
  8. 15. a complex, self-regulating system in which living things interact with each other and the environment
  9. 18. these ecosystems are planned or maintained by humans
  10. 19. the solid outer layer of the Earth
  11. 20. the part of the planet where life exists
Down
  1. 1. the layer of gas that surrounds the Earth
  2. 3. all the interactions of a given species with its ecosystem (its role)
  3. 4. any living thing
  4. 6. the ability of an ecosystem to continue to reproduce indefinitely
  5. 10. the physical environment of an organism
  6. 12. the number of different types of organisms that are present in an ecosystem
  7. 14. the study of how organisms interact with each other as well as their environment
  8. 16. a group of similar organisms that can reproduce with each other
  9. 17. a large geographical region that contains ecosystems with similar traits