In the Atlantic, North Atlantic Deep Water (NADW) sinks near Greenland and heads south along the ocean bottom. Antarctic Bottom Water (ABW) sinks off Antarctica and moves north along the ocean bottom. What happens when they meet?
a) NADW stays on the bottom and ABW overrides it.
b) ABW stays on the bottom and NADW overrides it.
c) ABW and NADW mix to form ocean common water (OCW).
d) The two water masses collide, causing them to turn upward and rise to the surface.
e) Because of the Coriolis Effect, one goes left and the other goes right, so they never meet.
Question 2
What is the main cause of surface water sinking to cause the deep, thermohaline ocean currents?
a) Density increase caused by increased wind currents
b) Density increase caused by cold in polar regions and increased salinity
c) Density decrease caused by greater salinity
d) Density decrease caused by cold in polar regions
e) Surface currents converging, driving them both downward
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