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WorksheetsOcean Review
Total questions: 16
Worksheet time: 8mins
Where does most of the dissolved Oxygen in the ocean come from?
Decaying life in the ocean.
Plants and phytoplankton doing photosynthesis.
Underwater earthquakes.
Animals that live in the ocean.
Which of the following helps provide energy to organisms that live in the deep ocean?
Cold water temps.
Hydrothermal vents.
Few predators.
High water pressure
Why is there more fishing in areas of upwelling?
Deep currents carry nutrients to the surface and critters prosper.
Deep currents carry nutrients to the bottom and critters prosper.
Upwelling keeps predator fish away from the ones we want.
Deep currents drag fish to the surface we want to catch.
Most critically important gases in the ocean?
nitrogen & oxygen
oxygen & methane
oxygen & carbon dioxide
nitrogen & sulfide
Hydrothermal vents give off methane and heat that deep ocean critters use to make energy. What's this?
Chemosynthesis
Photosynthesis
Hydropower
Thermal Heat
What is the main challenge of deep sea exploration?
Cost
Pressure
Time
People
Which resources do we get from the ocean?
Minerals and fossil fuels.
Food.
Medicine.
All of the above.
Why are estuaries (where rivers meet the ocean) significant? Choose all that apply.
Land protection from ocean surges.
Nurseries for marine young.
Commercial fishing
Human recreation
Where do most marine organisms live?
Photic/Neritic zone at the surface where sunlight & nutrients are.
Abyssal/Benthic zone at the bottom where lots of nutrients are.
In the Oceanic/aphotic zone where there are fewer predators.
Estuary or intertidal zones where they have more protection.
Which organism is the base of most marine food webs? Check all that apply.
Phytoplankton
Algae
Zooplankton
Small fish
Where would the greatest amount of oxygen be in the ocean?
At the surface -- plants, phytoplankton, & algae do photosynthesis.
Deep, cold water in the aphotic zone.
At the bottom, where hydrothermal vents & cold seeps are located.
Fish give off oxygen, so it's the same amount everywhere
Which is true about salinity and dissolved gases in the ocean?
Salinity up, gases up.
Salinity up, gases down.
Salinity down, gases down.
Salinity down, gases at the same amount
In which oceanic zone do clams and crabs survive by burrowing in the sand?
Oceanic
Intertidal
Deep ocean
Open ocean
In which ocean zone is ocean temperature most affected by the weather?
Deep zone
Polar zone
Surface zone
Transition zone
Which area of deep ocean research provides the most economic benefit?
Hydropower
New habitats
Oil resources
Sea-floor spreading
Which factors limit the productivity of a marine ecosystem?
Availability of light and nutrients.
Availability of nutrients and fresh water.
Availability of light and chemosynthetic organisms.
Availability of photosynthetic organisms and fresh water.
