Chapter 2

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Across
  1. 3. obtain energy and building materials by eating other organisms
  2. 5. visible forms of radiant energy
  3. 9. a large geographical region defined by climate with a specific set of biotic and abiotic features.
  4. 10. a representation of the feeding relationships within a community
  5. 12. The maximum population size of a particular species that a given ecosystem can sustain
  6. 13. describes the position of an organism along a food chain
  7. 15. The mass of living organisms in a given area
  8. 18. This is the role of a species within its ecosystem
  9. 20. Living components
  10. 22. Maintained through natural processes
  11. 23. Composed of both living and nonliving things
  12. 24. The most obvious of the biogeochemical cycles
  13. 25. A chemical process in which energy is released from food
  14. 27. without this process most life on earth would not exist
  15. 29. Warms the atmosphere, evaporates water, and produces winds
  16. 30. 70% of this energy is absorbed by the hydrosphere and lithosphere
Down
  1. 1. an organism that makes its own energy rich food components using the sun's energy
  2. 2. Carbon moves between the abiotic and biotic parts of an ecosystem in this cycle
  3. 4. acts like a blanket and moderates surface temperatures
  4. 6. display relationships between trophic levels in ecosystems
  5. 7. Nonliving components
  6. 8. Any factor that places an upper limit on the size of a population
  7. 11. bodies of water that are low in nutrients
  8. 14. every particle in an organism is part of this cycle
  9. 16. A way to illustrate who eats whom in an ecosystem
  10. 17. The zone around the earth where life can exist
  11. 19. bodies of water that are rich in nutrients
  12. 21. The ability to maintain an ecological balance
  13. 26. the abiotic conditions within which a species can survive
  14. 28. An important characteristic of freshwater ecosystems