Waves, Currents, and Tides

Sarah can float more easily in ocean water than in water in a swimming pool. Why is it easier for her to float in ocean water?

• ocean water is denser

• ocean water is deeper

• there is a larger volume of ocean water to float in

• she has a smaller mass in ocean water

Which best describes the Gulf Stream?

• A cold ocean current that cools the weather off near Australia.

• A cold ocean current that helps decrease global warming.

• A warm ocean current that influences weather along the east coast of the U.S. and up toward Europe.

• A warm ocean current that influences weather in Cuba and moves toward Antarctica.

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NGSS.MS-ESS2-6

A _____________________________ tide is produced when the Earth, and sun are aligned as in the diagram

• neap tide

• spring tide

• high tide

• low tide

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How do deep ocean currents form?

• The form as warm, dense water sinks and flows beneath cold ocean water.

• They form as cold, dense water sinks and flows beneath warm ocean water.

• They form as warm, dense water sinks and flows with other warm ocean water.

• The wind blows causing the deep ocean currents.

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NGSS.MS-ESS2-6

Surface ocean waves are formed by

• earthquakes

• landslides

• impacts of cosmic bodies

• wind

The Coriolis Effect is caused by

• Earth rotating around the sun
• Earth rotating on its axis
• The tides
• Magic water fairies

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NGSS.MS-ESS2-6

The height of a wave is MOST affected by the

• speed of the wind

• salinity of the ocean

• speed of the ocean

• amount of solar energy

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Which factor is MOST responsible for the ocean tides?

• the wind
• earthquakes
• the moon's gravity
• density differences in water

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NGSS.MS-PS2-4

Look at the picture. Which of the following statements best explains why the city of Hopedale is cooler than the city of Stornoway?

• Hopedale has a longer duration of isolation each day.

• Hopedale is influenced by a cold ocean current.

• Stornoway is farther from the equator

• Stornoway is on a different continent

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NGSS.MS-ESS2-6

What is the relationship between density and salinity in the ocean?

• As salinity in the ocean decreases, density of the ocean increases.

• As salinity in the ocean increases, density of the ocean increases.

• There is no relationship between salinity and density in the oceans.

• Salinity and density always remain the same throughout different parts of the ocean.