Topic 2.9 Quiz 2 Review

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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Most ocean waves are formed by

• earthquakes

• landslides

• impacts of cosmic bodies

• wind

Which two features together control the density of seawater?

• temperature and sea depth

• salinity and plankton concentration

• temperature and salinity

• salinity and depth

Which type of ocean movement is a large-scale pattern that can circulate across all the oceans?

• Current

• Wave

• Tide

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Which type of ocean movement can be divided into 2 groups: surface and deep?

• Current

• Wave

• Tide

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TRUE or FALSE: The Gulf Stream carries cool water toward the North Atlantic, causing the weather in Great Britain to be colder.

• TRUE

• FALSE

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NGSS.MS-ESS2-6

Surface currents are formed by

• the moon's gravity

• global winds

• the sun's gravity

• increased water density

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The development of a wave usually begins with

• currents

• wind

• gravity

• tsunamis

The Gulf Stream current shown here makes the waters of the North Atlantic

• warmer.

• cooler.

• more dense.

• less nutrient rich.

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Some ocean currents are caused by differences in the density of water from place to place around the globe. What two factors cause differences in ocean water density?

• differences in water temperature and wind

• differences in water temperature and phases of the moon

• differences in the amount of dissolved salts and gravity

• differences in water temperature and amount of dissolved salts

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NGSS.MS-ESS2-6