Biology Chapter 3

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Across
  1. 3. describes organisms that live in the open sea
  2. 7. number and proportion of species within an ecosystem
  3. 8. nonliving
  4. 9. describes organisms that live in and on the ocean floor
  5. 10. biome with plants that have waxy leaves and covers the least amount of the earth's surface
  6. 12. biome that receives less than 25 cm of rain per year
  7. 14. decribes a biome with cone-bearing trees
  8. 15. area smaller than a biome in which biotic and abiotic factors interact
  9. 18. the realm of life that extends from a few km into the atmosphere to a few km into earth's crust
  10. 19. the average weather of an area over an extended period of time
  11. 20. how an organism lives
  12. 22. describes a biome full of trees that lose their leaves in the fall and experiences the four seasons
Down
  1. 1. a group of the same species in a local area
  2. 2. biome with moderate rainfall, but not enough to support trees
  3. 4. line in the mountain biome past which it is too cold and dry for trees to grow
  4. 5. living
  5. 6. part of an ecosystem that an organism prefers
  6. 11. biome supporting an abundance of life with rainfall exceeding 250 cm per year
  7. 13. region of the biosphere that shares climate and a set of organisms
  8. 16. biome with widely-spaced trees and two seasons: rainy and dry
  9. 17. various species that live together in a local area
  10. 21. biome with frozen land year round
  11. 23. the study of interrelationships between organisms and their environment