Colin's Ecology crossword puzzle

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Across
  1. 3. non-living factor that effects the environment
  2. 8. organism that breaks down dead organic material
  3. 12. anything that delays or decreases the growth of a population
  4. 16. the struggle between organisms for resources in their environment
  5. 18. All of the organisms of a given area and the encompassing physical environment.
  6. 19. the area and resources used by a particular species (the habitat of a species) or an assemblage of animals and plants together with their abiotic environment
  7. 20. the changing of energy from one form to another
Down
  1. 1. plant that produces its own food by taking in sunlight
  2. 2. new species in an environment that is harmful and overpopulating
  3. 4. the variety of life in the world or in a particular habitat or ecosystem.
  4. 5. living organism that effects the environment
  5. 6. the surrounding conditions in which an organism lives
  6. 7. an innate, typically fixed pattern of behavior in animals in response to certain stimuli.
  7. 9. a diagram that shows how energy is transferred through organisms in a ecosystem
  8. 10. an organism that helps define an entire ecosystem.
  9. 11. the amount of organisms a certain environment can hold, and allow for those organisms to survive
  10. 13. a visual representation of what animals eat certain animals
  11. 14. differences in genes of a species
  12. 15. the study of an organisms relations to each
  13. 17. any organism that can't make its own food