Unit 8 Test Review Crossword Puzzle

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Across
  1. 5. Mutualism, commensalism, and parasitism are ________ relationships.
  2. 8. Hunted by predators for food, like a rabbit
  3. 10. A limiting factor involving two or more species fighting over something
  4. 11. Eats both plants and animals
  5. 12. The movement of humans into a city
  6. 13. Mushrooms are an example of a _________.
  7. 15. The result of over-grazing farm animals
  8. 16. Both organisms benefit
  9. 18. Always at the base of an energy pyramid
  10. 19. Eats only plants
  11. 20. An energy ________ shows how energy in an ecosystem decreases at each level.
Down
  1. 1. A group of different species
  2. 2. Eats only animals
  3. 3. One organism benefits, the other is unaffected
  4. 4. A group of the same species
  5. 6. One organism benefits, the other is harmed
  6. 7. The removal of trees from an environment
  7. 9. Primary, secondary, tertiary
  8. 14. Hunt prey for food, like a lion
  9. 17. Food, water, shelter, space are called _______ factors