Download Deep Ocean Currents Quiz Answer Key

 Deep Ocean Currents Quiz Answer Key 1) When strong persistent winds blow off shore… a) it moves water along the surface of the ocean. b) it brings deeper water up to the surface of the ocean. c) it creates nutrient rich waters at the surface of the ocean. d) all of the above e) a and b, but not c 2) When dense water sinks it is known as _downwelling_. 3) Thermohaline circulation is driven by… a) differences in temperature. b) differences in salinity. c) differences in temperature and salinity. d) none of the above. 4) Some of the most productive coastal areas in the world are areas of regular upwelling. a) true b) false 5) Deep ocean currents… a) flow in gyres. b) flow from north to south in the North Atlantic Ocean. c) flow from south to north in the South Pacific Ocean. d) all of the above e) b and c, but not a 6) Sea ice is made of salt water. a) true b) false 7) North Atlantic Deep Water (NADW) forms… a) at the North Pole. b) in the North Atlantic Gyre. c) off the coast of Greenland. d) none of the above 8) The densest downwelling water is formed off Antarctica. a) true b) false 9) The downwelling of water at high latitudes causes the upwelling of coastal water. a) true b) false – coastal upwelling is caused by the Coriolis effect and/or offshore winds 10) The formation of sea ice _increases_ the density of seawater.