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Chapter 14 section 1 Ocean Currents S6E3d Explain the causes of waves, currents, and tides.

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Presentation on theme: "Chapter 14 section 1 Ocean Currents S6E3d Explain the causes of waves, currents, and tides."— Presentation transcript:

1 Chapter 14 section 1 Ocean Currents S6E3d Explain the causes of waves, currents, and tides.

2 Surface currents are caused by a.Floods b.Warm water c.The wind d.The equator

3 Ocean currents in the Northern and Southern Hemispheres turn a.From west to east b.In opposite directions c.Clockwise d.Against the Earth’s rotation

4 Which process increases the salinity of ocean water? a.The Coriolis effect b.Convection currents c.Evaporation d.Continental deflection

5 Deep currents form when a.Cold air decreases water density b.Warm air increases water density c.The ocean surface freezes and solids from the warmer underneath d.Salinity increases

6 Compared with surface currents, deep currents are a. Colder and less dense b. Warmer and less dense c. Warmer and denser d. Colder and denser

7 Which phrase describes a surface current? a.Gets cool near the equator b.Flows like a stream c.Stretches from north to south d.Creates global winds

8 How does the Coriolis effect make ocean currents appear to move? a.Back and forth b.In a curved path c.Clockwise d.Against the Earth’s rotation

9 Which continent deflects the Gulf Stream Current? a.North America b.South America c.Africa d.Asia

10 What replaces a cold current that sinks to the ocean floor? a.Colder deep current b.A warmer surface current c.A colder surface current d.A slower surface current

11 What is the name of the ocean current that warms the British Isles? a.La Nina b.California Current c.Gulf Stream d.Equatorial Countercurrent

12 What is used by the NOAA to collect data to predict an El Nino? a.Buoys b.Satellites c.California Current d.Sonar

13 The movement of cold, nutrient-rich water to the surface of the ocean is called______. a.warm-water currents b.cold-water currents c.stream d.upwelling


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