Convection currents occur in oceans because of differences in the density of ocean water. One reason that ocean water has different densities is due to the uneven heating and cooling of ocean water. Water that is warmer is less dense, and water that is cooler is more dense. What other factor impacts the density of ocean water?
A.
Ocean water with a high salt concentration is more dense than ocean water with a low salt concentration.
B.
Ocean water that is frozen as a glacier is more dense than ocean water in liquid form.
C.
Ocean water that is closer to the equator is more dense than ocean water that is farther from the equator.
D.
Ocean water that is closer to land is more dense than ocean water that is farther from land.