Froggy Jumps Ocean Currents and Tides QuizVersion en ligne Test your knowledge about ocean currents and tides with this fun quiz! par Christi Scarbrough 1 Marissa 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? a Ocean water is deeper. b She has a smaller mass in ocean water. c Ocean water is denser. 2 How do deep ocean currents form? a As warm, dense water sinks and flows beneath cold ocean water. b As cold, dense water sinks and flows beneath warm ocean water. c As warm, dense water sinks and flows with other warm ocean water. 3 Which best describes the Gulf Stream? a A cold ocean current that helps decrease global warming. b A warm ocean current that influences weather along the east coast of the U.S. and up toward Europe. c A warm ocean current that influences weather in Cuba and moves toward Antarctica. 4 Which of the following is a factor of surface currents? a deep ocean currents b increased salinity c Earth’s rotation 5 Most ocean waves are formed by a wind b earthquakes c landslides 6 Which of the following does NOT control surface currents? a continental deflections b global wind c tides 7 What phenomenon does the Coriolis Effect arise from? a Rotation of the Earth on its axis. b Revolution of the Earth on its axis. c Curvature of the Earth’s surface. 8 What happens to the ocean as depth increases? a pressure decreases b salinity decreases c temperature decreases 9 Surface currents always move water ___________. a clockwise b horizontally c vertically 10 Ocean currents have an effect on which two things a climate and weather b land and sea c temperature and density 11 Which two features together control the density of seawater? a temperature and salinity b temperature and sea depth c salinity and plankton concentration 12 The height of a wave is MOST affected by the a speed of the ocean b speed of the wind c salinity of the ocean 13 How does warm-water currents affect the coastal areas along which they flow? a cool the coast b cause higher tides c warm the coast 14 What does a decrease in salinity cause density to do? a nothing b increase c decrease 15 Where is the least dense seawater found? a Surface of the ocean b middle of the ocean c at the mid-ocean ridge
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