Properties of Ocean Water

What is the relationship between temperature and density in ocean water?

• As temperature increases, density increases.

• As temperature decreases, density increases.

• Temperature and density are unrelated.

• As temperature increases, density decreases.

How do marine organisms help maintain the chemical balance of ocean water?

• By filtering out pollutants from the water.

• By removing nutrients and returning other nutrients and gases to the water.

• By increasing the temperature of the water.

• By consuming all available oxygen in the water.

True or False: The density of a specific type of material never changes.

• True

• False

• It depends on the temperature

• It depends on the pressure

How does ocean water density affect ocean currents?

• Differences in density drive thermohaline circulation, influencing global climate.

• Ocean water density has no effect on ocean currents.

• Higher density water always moves to the surface of the ocean.

• Ocean currents are solely driven by wind patterns.

What is the process of photosynthesis in marine environments?

• It is the process by which marine plants convert sunlight into energy, producing oxygen.

• It is the process by which marine animals breathe underwater.

• It is the process of nutrient absorption through the ocean floor.

• It is the process of water filtration by marine organisms.

What is the term for a rapid change of temperature with increasing depth of the ocean?

• Thermocline

• Halocline

• Pycnocline

• Isotherm

What is the average salinity of ocean water?

• 30 parts per thousand (ppt)

• 35 parts per thousand (ppt)

• 40 parts per thousand (ppt)

• 25 parts per thousand (ppt)

What is the impact of increased carbon dioxide levels on ocean water chemistry?

• It leads to ocean acidification, affecting marine life and ecosystems.

• It increases the temperature of ocean water.

• It decreases the salinity of ocean water.

• It enhances the growth of marine plants.

What are the primary gases exchanged in ocean water by marine organisms?

• Nitrogen and oxygen.

• Oxygen and carbon dioxide.

• Hydrogen and methane.

• Carbon monoxide and sulfur dioxide.

What is the role of nutrients in ocean water?

• Nutrients are harmful to marine life and cause pollution.

• Nutrients support the growth of marine organisms and are essential for food webs.

• Nutrients are only important for freshwater ecosystems.

• Nutrients have no significant role in ocean water.