1. Ecology Populations Review

2. Define ecology

3. The study of the interaction of living organisms with each other in their physical environment.

4. What is a group of species or organisms called?

5. A population

6. What are a group of different populations called?

7. A community

8. What are a group of different communities called?

9. An ecosystem or biome

10. What are a group of ecosystems or biomes called?

11. The biosphere

12. List five abiotic and biotic factors of a community.

13. Biotic: Abiotic: Plants Soil Animals Water Bacteria Temperature Decomposers (fungi) Energy Algae

14. What is a habitat?

15. The place where a organism lives

16. What is a niche?

17. Where, what and when an organism lives. It is it’s role in the habitat.

18. The organisms that make nutrients are called________________.

19. Producers (autotrophs)

20. What is biomass?

21. The total of all the weight of all the organisms

22. Name an herbivore.

23. A cow

24. Name a carnivore

25. A lion

26. What is an omnivore?

27. An organism that eats both plants and other animals.

28. How is nitrogen released back into the environment after an organism dies?

29. It has to go through decomposition to be released

30. What is a food web?

31. A series of interacting organisms that feed off of each other.

32. List an herbivore

33. What are the levels of the food chain called?

34. Trophic levels

35. Which level of the food chain has the smallest biomass?

36. The top predator

37. Where on the food chain will the producers be found?

38. The bottom

39. What percent of energy is lost at each trophic level of a food chain?

40. 10%

41. Water, carbon dioxide/oxygen, nitrogen are all examples of ________________ cycles

42. biogeochemical

43. Which cycle contains precipitation, transpiration, and evaporation

44. The water cycle

45. Why do humans and all organisms need nitrogen in their diets?

46. To make proteins

47. What is the source of coal, oil and natural gas?

48. From once living things: Coal: plants Oil: decomposed dinosaurs, marine animals Natural gas: underground microorganisms

49. What negative impact do humans have on the carbon dioxide/oxygen cycle?

50. Clear cutting Burning

51. What has helped the human population go into an exponential growth?

52. Better health care Better nutrition Better living conditions

53. Explain what the carrying capacity of a population is.

54. Births equal deaths, the population stabilizes

55. What was the impact of the agricultural revolution on population?

56. It increased dramatically

57. What type of graph is this?

58. exponential

59. What is the correlation between this type of graph and limiting factors?

60. There aren’t many limiting factors preventing growth.

61. Which year has the greatest human population growth?