Ecosystem Crossword Challenge

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Across
  1. 2. Organisms of the same species living in an area (pp. 148–165)
  2. 5. Describing interactions in which one organism hunts another organism (pp. 102–119)
  3. 8. Relationships among organisms and their environments (pp. 102–119)
  4. 10. Chemical reactions in organisms that release stored energy (pp. 24–41)
  5. 13. Things organisms need to survive, such as food, water, and oxygen (pp. 84–101)
  6. 15. Models that demonstrate how matter and energy move through an ecosystem (pp. 42–57)
  7. 17. The increasing concentration of substances moving through a food web (pp. 42–57)
  8. 18. The complete loss of a species from Earth (pp. 166–189)
  9. 19. Changes in ecosystems over time after disturbances (pp. 148–165)
  10. 21. The process by which plants use sunlight to make sugars (pp. 24–41)
  11. 22. Organisms that make food molecules using energy from sunlight (pp. 24–41)
  12. 23. The movement of energy through a natural system (pp. 42–57)
Down
  1. 1. Describing interactions in which organisms compete for limited resources (pp. 105–119)
  2. 3. The transfer process that helps plants reproduce (pp. 166–189)
  3. 4. Nonliving factors in an ecosystem (pp. 68–83)
  4. 6. The natural environment where organisms live (pp. 68–83)
  5. 7. The reuse of nutrients and matter within ecosystems (pp. 166–189)
  6. 9. Organisms that obtain energy by eating other organisms (pp. 42–57)
  7. 11. The variety of species found in Earth’s ecosystems (pp. 130–147 and 166–189)
  8. 12. A close relationship between organisms that may benefit one or both organisms (pp. 102–119)
  9. 14. Living factors in an ecosystem (pp. 68–83)
  10. 16. Organisms that recycle nutrients from dead plant or animal matter (pp. 42–57)
  11. 20. A community of organisms interacting with their environment (pp. 68–83)