Question:

Answer: C

Question: Which of the following pathways indicate how nitrogen is added to the largest nitrogen reservoir?

1. Nitrifying bacteria and lightning

2. B.Decomposing plant and animal material

3. C. Denitrifying bacteria and volcanic activity

4. D. Nitrates taken up by plant roots

5. Answer: C

6. Question: Nitrate ions and nitrite ions are converted into nitrous oxide gas and nitrogen gas (N2).

7. A. Nitrification

8. B. Denitrification

9. C. Assimilation

10. D. Ammonification

11. E. Nitrogen Fixation

12. Answer: B

13. Question: Approximately what percent of the water on Earth is freshwater (liquid and solid)?

14. A. 75%

15. B. 25%

16. C. 2.5%

17. D. 0.25%

18. E. 0.025%

19. Answer: C

20. Question:

21. Answer: B

22. Question: Country with the largest area of temperate deciduous forest?

23. A. Australia

24. B. Brazil

25. C. Chile

26. D. Russia

27. E. United States of America

28. Answer: E

29. Question: Decreased by the breakdown of organic waste

30. A. Acidity

31. B. Turbidity

32. C. Hardness

33. D. Dissolved Oxygen

34. E. Salinity

35. Answer: D

36. Question:

37. Answer: D

38. Question: Marine sediments that form limestone are a major sink for this element

39. A. Carbon

40. B. Sodium

41. C. Sulfur

42. D. Phosphorus

43. E. Potassium

44. Answer: A

45. Question: Of the following organisms, which occupies the lowest trophic level?

46. A. Spider

47. B. Deer

48. C. Lion

49. D. Hawk

50. E. Snake

51. Answer: B