Marine Ecosystem Quiz

Where does the oxygen in the marine ecosystem come from?

• From the respiration/photosynthesis cycle

• From upwellings

• From eutrophication

• From cold water, lower salinity, and deeper water

What is the process of eutrophication?

• The process where too many nitrates get in water and cause an algae bloom

• How plants make their own food

• The process where winds blow warm water away and bring nutrients to the surface

• The process where plants and animals make energy from sugar

What is NOT one way marine life get nutrients?

• From other organisms

• From decaying organisms

• From upwellings

• From eutrophication

What is the main source of oxygen in the marine ecosystem?

• Photosynthesis (plants)

• Eutrophication

• Upwellings

• Respiration (animals)

What happens when there is an algae bloom due to eutrophication?

• The water becomes clearer and more oxygen-rich

• Marine life gets an abundant supply of nutrients

• Bacteria feed on the algae and multiply rapidly, using up oxygen and causing marine life to suffocate and die

• The algae bloom has no impact on the marine ecosystem

Why is upwelling beneficial?

• It provides waters where commercially important fish spawn or seek refuge at some stage

• cool, deep water rises to the surface bringing nutrients for fish which benefits coastal ecosystems and fisherman

• fresh and sale water mix to support unique communities of organisms making the area very productive

• it allows scientists to determine the health of the ocean environment and monitor changes over time

In which oceanic zone do clams and crabs survive by burrowing in the sand?

• Oceanic

• Deep sea

• Open sea

• Intertidal

What lives on or near the bottom of the ocean?

• Plankton

• Nekton

• Benthos

• Hydrothermal Vents

What is microscopic and floats in the ocean?

• Plankton

• Benthos

• Nekton

• Fish

The part of the ocean where ecosystems do not rely on sunlight to create nutrients, but instead rely on chemicals released from inside the Earth to sustain life....

• The intertidal zone

• Around hydrothermal vents

• The deep zone

• The surface zone