Ocean Composition QUIZ

What is one way the ocean influences human life?

• It regulates climate

• It generates electricity

• It creates mountains

• It causes earthquakes

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Which of the following is a way humans influence the ocean?

• Creating deserts

• Planting trees

• Building mountains

• Overfishing

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How did Earth's cooling contribute to the formation of oceans?

• It allowed water vapor to condense

• It increased the amount of sunlight

• It created more land

• It caused volcanic eruptions

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What role did comets and asteroids play in the formation of oceans?

• They changed the climate

• They caused volcanic eruptions

• They created landforms

• They brought additional water

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Why is ocean water saltier than freshwater?

• It has more living organisms

• It is colder

• It contains more minerals

• It evaporates faster

Where does the majority of the salt in the ocean come from?

• Atmospheric pollution

• Weathering and erosion of rocks on land

• Ocean animals

• Ocean currents

What happens to ocean salinity when freshwater enters the ocean?

• It stays the same

• It decreases

• It increases

• It becomes toxic

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Which area is likely to have the highest salinity?

• The Arctic Ocean

• The Great Lakes

• The Red Sea

• The Amazon River Delta

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How does evaporation affect ocean salinity?

• It increases salinity

• It decreases salinity

• It makes the ocean fresh

• It has no effect

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What is the average salinity of ocean water?

• 10 parts per thousand

• 35 parts per thousand

• 50 parts per thousand

• 20 parts per thousand