Biology- Chapter 3

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Across
  1. 4. nonliving aspects of an ecosystem
  2. 7. a relationship where two organisms benefit from each other
  3. 8. limited area smaller than a biome, in which living and nonliving things interact
  4. 13. land that is frozen year round, has minimal vegetation and short summers.
  5. 15. organisms that break down nutrients
  6. 16. a group of organisms of the same species interacting in the same area
  7. 18. the number of species in an area
  8. 20. warm humid air, over 250cm of rain, and an abundance of life. Trees grow in layers
  9. 27. moderate amounts of precipitation. Cool, wet winters and warm, dry summers. Covers the least amount of Earths surface with plants with waxy leaves.
  10. 28. top layer of the aquatic biome
  11. 29. when both orgaisms live in the same habitat but don't directly affect each other
  12. 31. when animals interact with each other in their ecosystem it can either be helpful or harmful for them
  13. 32. dead, decaying organic matter from plants or animal waste
  14. 33. a smaller part of an ecosystem that an organism prefers
Down
  1. 1. gets less than 25cm of rain a year. Temperatures can change dramatically and most organisms survive by conserving water or being active at night.
  2. 2. large areas that the biosphere is divided up into which includes organisms that are suited to that environment
  3. 3. a model that demonstrates the flow of energy in a group of organisms by identifying each trophic level, the bottom being producers and top being carnivores
  4. 5. doesn't get enough rainfall to support trees but grasses grow in rippling fields here which support many herbivores
  5. 6. an organism that depends on a larger organism for survival exhibits this type of relationship
  6. 9. a relationship that occurs when one organism is injured while the other is unaffected
  7. 10. the study of interrelationships between organisms and their physical surroundings
  8. 11. ecological layering that occurs because their is a difference in light and rainfall due to elevation changes
  9. 12. a model representing the flow of energy in an ecosystem using arrows to point to the direction an organism would be be consumed by
  10. 14. also known as heterotrophs
  11. 17. the way an organism lives in its habitat or the impact or role they play in it
  12. 18. the realm of life on Earth, which extends into the atmosphere and Earth's crust
  13. 19. temperate zone that receives moderate rainfall with moderate temperatures. All four seasons.
  14. 21. a relationship where one organism benefits and the other organism is neither harmed nor helped
  15. 22. middle layer of the aquatic biome
  16. 23. when there is a limited supply of a resource that more than one organism needs in an ecosystem, organisms do this
  17. 24. also known as autotrophs
  18. 25. widely spaced trees with lots of grasses. Moderate to high temperatures year-round. Rainy season brings 100-150cm of rain.
  19. 26. living aspects of an ecosystem
  20. 27. two seasons occur here each year. Hemlock, firs, and redwoods block out most light and change the soil making it difficult for other plants to grow.
  21. 30. bottom layer of the aquatic biome