Ocean and Water Cycle Quiz

How does pollution impact the water cycle and the ocean ecosystem?

• It makes rainfall stop

• It adds nutrients to water

• It contaminates water and harms plants and animals

• It helps form sediment

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What is the main reason saltwater doesn’t freeze as quickly as freshwater?

• It is deeper in the ocean

• Salt lowers the freezing point of water

• Saltwater has more animals in it

• It gets more sunlight than freshwater

Which of the following BEST explains how groundwater is connected to the water cycle?

• It only forms during evaporation

• It is collected in oceans

• It comes from precipitation soaking into the soil

• It is frozen rain under the ground

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How does the ocean floor change over time?

• It stays the same forever

• Underwater mountains shrink slowly

• Movement of Earth's plates causes ridges and trenches to form

• Ocean waves carve new land underwater every day

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What would MOST LIKELY happen if the Sun suddenly stopped shining?

• Water would freeze, and the water cycle would stop

• More water would evaporate

• The Earth would get more rainfall

• Ocean currents would speed up

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Why is it important to understand the different layers (zones) of the ocean?

• They help explain ocean tides

• They show where all waves are made

• They describe different living conditions for ocean organisms

• They help scientists measure pollution

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Why do animals in the dark zone of the ocean often produce their own light?

• To warm up

• To help them float

• To find food or attract mates in the darkness

• To clean the water

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Why is it important to conserve freshwater even though Earth has a lot of water?

• All of Earth’s water is saltwater

• Freshwater is harder to see

• Only a small part of Earth’s water is freshwater that we can use

• Groundwater is not part of the water cycle

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Which feature of the ocean floor is MOST LIKELY to have the coldest water and highest pressure?

• Continental shelf

• Mid-ocean ridge

• Trench

• Surface wave

What would happen if all phytoplankton disappeared from the ocean?

• The ocean would have clearer water

• Many animals would lose their main food source

• Coral reefs would grow faster

• There would be more precipitation

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