Fluids, such as ocean water, flow from areas of higher density to areas of lower density. What best describes how a change in density can occur in ocean water?

Question

A.
by changing the direction of currents in the ocean
B.
by changing the abundance of animals living in the ocean
C.
by changing the wind direction of air above the ocean
D.
by changing the salt concentration of the ocean

Answer 1

The best option that describes how a change in density can occur in ocean water is:

D. by changing the salt concentration of the ocean.

Changes in salinity (salt concentration) can affect the density of ocean water, as saltier water is denser than less salty water. Changes in temperature can also affect density, as warmer water is generally less dense than cooler water. However, among the options provided, the change in salt concentration is the most direct factor influencing density.