1. A thermocline is a layer in a body of water in which water
A) acts as an insulator against solar energy.
B) temperature drops with increased depth faster than any other layers.
C) temperature increases with increased depth faster than any other layers.
D) temperature is ideal for polar marine life to flourish.
2. The range of ocean temperatures is affected by
A) storms and proximity to land masses.
B) the moon and proximity to land masses.
C) solar energy and water movement.
D) the percent of salt and other trace minerals.
3. A major obstacle to the advancement of aquaculture is
A) high cost.
B) pollution.
C) political opposition.
D) lack of usable ocean resources.
4. Two factors that affect the density of ocean water is
A) salinity and trace minerals.
B) water temperature and phytoplankton.
C) nitrogen and carbon dioxide levels.
D) salinity and water temperature.
5. Which zone lies below the 6,000 meter depth?
A) abyssal zone
B) oceanic zone
C) bathyal zone
D) hadal zone
6. Which zone within the pelagic environment is ideal for marine life?
A) oceanic zone
B) neritic zone
C) bathyal zone
D) hadal zone
7. Plankton are the foundation of life in the ocean because they
A) are at the top of the ocean food chain.
B) establish a proper environment for all sea life.
C) balance the chemical composition of the ocean habitat.
D) form the base of the ocean food chain.
8. Some of the most deadly pollutants found in ocean water today include mercury, toxic chemicals such as DDT, and
A) trace minerals.
B) nodules.
C) decaying sea organisms.
D) lead.
9. By studying variations in color of the ocean, scientists can determine the presence of
A) sea mammals.
B) phytoplankton.
C) oxygen.
D) trace elements.
10. Oceans are often referred to as a carbon sink. How many times more carbon is contained in the ocean than in the atmosphere?
A) 20 times more
B) 40 times more
C) 60 times more
D) 80 times more
11. One positive aspect of aquaculture is
A) an ocean farm could produce more food than an agricultural farm of the same size.
B) only seaweed can be grown in an ocean farm.
C) only the top layers of soil can be used to grow resources in the ocean.
D) all of the above
12. The two principal gases dissolved in ocean water are
A) carbon dioxide and oxygen.
B) oxygen and hydrogen.
C) hydrogen and nitrogen.
D) nitrogen and oxygen.
13. The ocean environment that receives the most solar energy and is home to the most diverse ocean life forms is the
A) continental shelf.
B) benthic zone.
C) pelagic zone.
D) upwelling.
14. Global oceans have an average salinity of
A) 34.7%.
B) 27.3%.
C) 40.1%.
D) 10.8%.
15. Raising aquatic plants and animals for human consumption is known as
A) farming.
B) agriculture.
C) aquaculture.
D) water farming.
16. Which of these activities have potential negative impacts on the ocean?
A) mining ocean resources
B) aquaculture
C) over fishing
D) all of the above
17. Which of the following results in an increase in ocean salinity?
A) The rate of evaporation is higher than the rate of precipitation
B) The rate of precipitation is higher than the rate of evaporation
C) The rate of condensation is higher than the rate of precipitation
D) The rate of precipitation is higher than the rate of condensation
18. The benthic zone contains marine life that
A) are the size of plankton.
B) are surface feeders.
C) are bottom-dwelling.
D) live in ocean trenches.
19. All of the following are potential negatives associated with desalination EXCEPT:
A) It is expensive
B) Large amounts of energy are used
C) It uses little energy
D) There are environmental concerns with the process
20. Which is a form of desalination?
A) magnesium filtering
B) freezing
C) magnetic distilling
D) carbon recycling
21. The extraction of fresh water from salt water is known as
A) oxidation.
B) distillation.
C) condensation.
D) desalination.
22. Many governments have passed laws to manage fishing because
A) seafood has gone to waste at the market.
B) aquatic farming is inhumane.
C) the ocean can be over fished and over harvested.
D) not many people like oysters or clams.
23. Which zone within the benthic environment is ideal for most marine organism growth?
A) sublittoral zone
B) intertidal zone
C) abyssal zone
D) oceanic zone
24. What causes the movement of deep, cold, nutrient-rich water to the surface in an upwelling?
A) deep-ocean earthquakes
B) steady winds blowing parallel to the coast line
C) glaciers moving into the ocean
D) underwater volcanic activity
25. The ocean can be divided into what two basic environments?
A) benthic zone and pelagic zone
B) plant and marine life
C) polar and nonpolar zones
D) abyssal zone and intertidal zone
A) acts as an insulator against solar energy.
B) temperature drops with increased depth faster than any other layers.
C) temperature increases with increased depth faster than any other layers.
D) temperature is ideal for polar marine life to flourish.
2. The range of ocean temperatures is affected by
A) storms and proximity to land masses.
B) the moon and proximity to land masses.
C) solar energy and water movement.
D) the percent of salt and other trace minerals.
3. A major obstacle to the advancement of aquaculture is
A) high cost.
B) pollution.
C) political opposition.
D) lack of usable ocean resources.
4. Two factors that affect the density of ocean water is
A) salinity and trace minerals.
B) water temperature and phytoplankton.
C) nitrogen and carbon dioxide levels.
D) salinity and water temperature.
5. Which zone lies below the 6,000 meter depth?
A) abyssal zone
B) oceanic zone
C) bathyal zone
D) hadal zone
6. Which zone within the pelagic environment is ideal for marine life?
A) oceanic zone
B) neritic zone
C) bathyal zone
D) hadal zone
7. Plankton are the foundation of life in the ocean because they
A) are at the top of the ocean food chain.
B) establish a proper environment for all sea life.
C) balance the chemical composition of the ocean habitat.
D) form the base of the ocean food chain.
8. Some of the most deadly pollutants found in ocean water today include mercury, toxic chemicals such as DDT, and
A) trace minerals.
B) nodules.
C) decaying sea organisms.
D) lead.
9. By studying variations in color of the ocean, scientists can determine the presence of
A) sea mammals.
B) phytoplankton.
C) oxygen.
D) trace elements.
10. Oceans are often referred to as a carbon sink. How many times more carbon is contained in the ocean than in the atmosphere?
A) 20 times more
B) 40 times more
C) 60 times more
D) 80 times more
11. One positive aspect of aquaculture is
A) an ocean farm could produce more food than an agricultural farm of the same size.
B) only seaweed can be grown in an ocean farm.
C) only the top layers of soil can be used to grow resources in the ocean.
D) all of the above
12. The two principal gases dissolved in ocean water are
A) carbon dioxide and oxygen.
B) oxygen and hydrogen.
C) hydrogen and nitrogen.
D) nitrogen and oxygen.
13. The ocean environment that receives the most solar energy and is home to the most diverse ocean life forms is the
A) continental shelf.
B) benthic zone.
C) pelagic zone.
D) upwelling.
14. Global oceans have an average salinity of
A) 34.7%.
B) 27.3%.
C) 40.1%.
D) 10.8%.
15. Raising aquatic plants and animals for human consumption is known as
A) farming.
B) agriculture.
C) aquaculture.
D) water farming.
16. Which of these activities have potential negative impacts on the ocean?
A) mining ocean resources
B) aquaculture
C) over fishing
D) all of the above
17. Which of the following results in an increase in ocean salinity?
A) The rate of evaporation is higher than the rate of precipitation
B) The rate of precipitation is higher than the rate of evaporation
C) The rate of condensation is higher than the rate of precipitation
D) The rate of precipitation is higher than the rate of condensation
18. The benthic zone contains marine life that
A) are the size of plankton.
B) are surface feeders.
C) are bottom-dwelling.
D) live in ocean trenches.
19. All of the following are potential negatives associated with desalination EXCEPT:
A) It is expensive
B) Large amounts of energy are used
C) It uses little energy
D) There are environmental concerns with the process
20. Which is a form of desalination?
A) magnesium filtering
B) freezing
C) magnetic distilling
D) carbon recycling
21. The extraction of fresh water from salt water is known as
A) oxidation.
B) distillation.
C) condensation.
D) desalination.
22. Many governments have passed laws to manage fishing because
A) seafood has gone to waste at the market.
B) aquatic farming is inhumane.
C) the ocean can be over fished and over harvested.
D) not many people like oysters or clams.
23. Which zone within the benthic environment is ideal for most marine organism growth?
A) sublittoral zone
B) intertidal zone
C) abyssal zone
D) oceanic zone
24. What causes the movement of deep, cold, nutrient-rich water to the surface in an upwelling?
A) deep-ocean earthquakes
B) steady winds blowing parallel to the coast line
C) glaciers moving into the ocean
D) underwater volcanic activity
25. The ocean can be divided into what two basic environments?
A) benthic zone and pelagic zone
B) plant and marine life
C) polar and nonpolar zones
D) abyssal zone and intertidal zone