Introduction to Ecology

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Across
  1. 1. an event that changes a community by removing organisms from it or altering the availability of resources.
  2. 7. where an organism lives including biotic and abiotic factors.
  3. 8. the day-to-day conditions of the Earth's atmosphere at a particular time and place.
  4. 10. are near the equator and are almost always warm.
  5. 13. the scientific study of interactions between organisms and the environment.
  6. 16. each step in a food chain.
  7. 19. are cold areas where the sun's rays strike the Earth at a very low angle.
  8. 21. largest level of ecological organization and includes all life on Earth.
  9. 26. a brief period of time in which large numbers of species die out and disappear.
  10. 28. feed on plant and animal remains, animal wastes, and other dead matter.
  11. 29. the living components of the environment.
  12. 30. use energy from the environment to make their own food.
Down
  1. 2. the process an organism goes through when adjusting to a change in an abiotic factor.
  2. 3. all the organisms that live in a particular place, together with their nonliving, or physical, environment.
  3. 4. a way of life or the role the species plays in its environment.
  4. 5. has a narrow niche. Eats only one type of food.
  5. 6. the nonliving factors that influence an ecosystem.
  6. 9. use energy to control some of their internal body conditions and maintain certain internal conditions even when there are wide fluctuations in the external environment.
  7. 11. do not regulate their internal conditions they change as their external environment changes.
  8. 12. are between the polar and tropical zones and range from hot to cold depending on the season.
  9. 14. all the organisms that live in a particular place, together with their nonliving, or physical, environment.
  10. 15. a species with a broad niche and can live almost anywhere and eat almost anything
  11. 17. activities are changing the composition of the atmosphere.
  12. 18. cause decay by breaking down organic compounds.
  13. 20. the simplest level of organization in ecology.
  14. 22. is a molecule composed of three oxygen atoms found in the upper atmosphere.
  15. 23. all the members of a single species that live in an area.
  16. 24. are not capable of harnessing energy directly from the environment.
  17. 25. a genetic change in a species or population that occurs over many generations.
  18. 27. the average year-after-year conditions of temperature and precipitation in a particular region.