Question

When is seawater the most dense?

A.
when salinity is low and its temperature is high

B.
when salinity is low and its temperature is low

C.
when salinity is high and its temperature is low

D.
when salinity is high and its temperature is high

Answer 1

C. When salinity is high and temperature is low. Cold water is denser than warm water, and added salt increases mass per unit volume, so cold, salty water is most dense.