2. Which of the following gasses dissolves most easily in ocean water? a) Hydrogen b) Oxygen c) Nitrogen d) Carbon dioxide

3. Which of the following gasses dissolves most easily in ocean water? a) Hydrogen b) Oxygen c) Nitrogen d) Carbon dioxide

4. The boundary between continental crust and oceanic crust occurs at the base of the a) Continental shelf b) Continental slope c) Abyssal plain d) Midocean ridge

5. The boundary between continental crust and oceanic crust occurs at the base of the a) Continental shelf b) Continental slope c) Abyssal plain d) Midocean ridge

6. What percentage of ocean water is pure water? a) 3.5% b) 39.5% c) 57.7 % d) 96.5 %

7. What percentage of ocean water is pure water? a) 3.5% b) 39.5% c) 57.7 % d) 96.5 %

8. The majority of the dissolved minerals carried into the ocean by earth’s rivers are a) Salts b) Ores c) Silicates d) Carbonates

9. The majority of the dissolved minerals carried into the ocean by earth’s rivers are a) Salts b) Ores c) Silicates d) Carbonates

10. The shallowest portion of the continental margin is the a) Continental shelf b) Continental slope c) Abyssal plain d) Mid-ocean ridge

11. The shallowest portion of the continental margin is the a) Continental shelf b) Continental slope c) Abyssal plain d) Mid-ocean ridge

12. Which of the following describes a sea mount? a) Ocean floor at the edge of a margin b) Underwater mountain range c) Sediment piled at the base of the continental slope d) Submerged volcanic mountains

13. Which of the following describes a sea mount? a) Ocean floor at the edge of a margin b) Underwater mountain range c) Sediment piled at the base of the continental slope d) Submerged volcanic mountains

14. Nearly all ocean life is regulated by the a) Type of sediment on the ocean floor b) Addition of substances to ocean water c) Life processes of phytoplankton d) Abundance of swimming ocean animals

15. Nearly all ocean life is regulated by the a) Type of sediment on the ocean floor b) Addition of substances to ocean water c) Life processes of phytoplankton d) Abundance of swimming ocean animals

16. The process by which deep, nutrient rich water moves upward to replace surface water that has been blown off shore is called a) Thermocline b) Distilling c) Desalination d) Upwelling

17. The process by which deep, nutrient rich water moves upward to replace surface water that has been blown off shore is called a) Thermocline b) Distilling c) Desalination d) Upwelling

18. Organisms that live on the ocean floor are called a) Zooplankton b) Nekton c) Benthos d) Phytoplankton

19. Organisms that live on the ocean floor are called a) Zooplankton b) Nekton c) Benthos d) Phytoplankton

20. The Mediterranean Sea’s high salinity can be attributed to a) Constant evaporation of the surface water b) The temperature of the deep currents c) The wind d) Upwelling

21. The Mediterranean Sea’s high salinity can be attributed to a) Constant evaporation of the surface water b) The temperature of the deep currents c) The wind d) Upwelling

22. Large ocean animals that swim and eat microscopic plants and animals are called a) Zooplankton b) Nekton c) Benthos d) Phytoplankton

23. Large ocean animals that swim and eat microscopic plants and animals are called a) Zooplankton b) Nekton c) Benthos d) Phytoplankton

24. Deep Atlantic currents are formed largely as a result of a) Erosion by surface winds b) Heating of surface water c) Rotation of the earth d) Sinking dense water

25. Deep Atlantic currents are formed largely as a result of a) Erosion by surface winds b) Heating of surface water c) Rotation of the earth d) Sinking dense water

26. The most valuable resource taken from the ocean is a) Petroleum from beneath the ocean floor b) Copper deposited on the ocean floor c) Calcite found in sea shells d) Gold dissolved in the ocean

27. The most valuable resource taken from the ocean is a) Petroleum from beneath the ocean floor b) Copper deposited on the ocean floor c) Calcite found in sea shells d) Gold dissolved in the ocean

28. Tides are primarily caused by a) Density differences b) Salinity differences c) Gravitational attraction d) Currents

29. Tides are primarily caused by a) Density differences b) Salinity differences c) Gravitational attraction d) Currents

30. Which type of current results from underwater landslides? a) Rip current b) Turbidity current c) Longshore current d) Tidal current

31. Which type of current results from underwater landslides? a) Rip current b) Turbidity current c) Longshore current d) Tidal current

32. What is the driving force for surface ocean currents? a) Density layering b) The Coriolis Effects c) Global winds d) Salt concentration

33. What is the driving force for surface ocean currents? a) Density layering b) The Coriolis Effects c) Global winds d) Salt concentration

34. The most abundant major element that is dissolved in ocean water is a) Chlorine b) Calcium c) Boron d) Potassium

35. The most abundant major element that is dissolved in ocean water is a) Chlorine b) Calcium c) Boron d) Potassium

36. Which feature is formed when oceanic plates are separating? a) Trench b) Submarine canyon c) Mid ocean Ridge d) Abyssal plain

37. Which feature is formed when oceanic plates are separating? a) Trench b) Submarine canyon c) Mid ocean Ridge d) Abyssal plain

38. Which ocean zone separates warm surface water from cold deep water? a) Abyssal plain b) Thermocline c) Neritic zone d) Benthic

39. Which ocean zone separates warm surface water from cold deep water? a) Abyssal plain b) Thermocline c) Neritic zone d) Benthic

40. In which environment does salinity tend to be higher? a) Deep lake waters b) Deep tropical waters c) Surface tropical waters d) Surface temperate waters

41. In which environment does salinity tend to be higher? a) Deep lake waters b) Deep tropical waters c) Surface tropical waters d) Surface temperate waters

42. Which of the following organisms serve as the first link in the ocean food chain? a) Benthos b) Seaweed c) Nekton d) Plankton

43. Which of the following organisms serve as the first link in the ocean food chain? a) Benthos b) Seaweed c) Nekton d) Plankton

44. In general, all the elements necessary to sustain marine life are consumed a) Near the surface of the ocean b) Near the shoreline c) At intermediate ocean depths d) At great ocean depths

45. In general, all the elements necessary to sustain marine life are consumed a) Near the surface of the ocean b) Near the shoreline c) At intermediate ocean depths d) At great ocean depths

46. Nodules are valuable sources of a) Carbon b) Manganese c) Silicon d) Magnesium

47. Nodules are valuable sources of a) Carbon b) Manganese c) Silicon d) Magnesium

48. Changes in slat concentration in the ocean will cause changes in a) Surface ocean currents b) Temperature c) Density d) Volume

49. Changes in slat concentration in the ocean will cause changes in a) Surface ocean currents b) Temperature c) Density d) Volume

50. THE END!!!