15.2 Seawater

What percentage of seawater is dissolved salts?

3.5 percent

Which process does not add salts to seawater?

decay of hard-shelled sea creatures

Which process removes salt from seawater?

evaporation of elements near arid coastal regions.

What causes surface ocean sea water to have a higher salt content?

high rates of evaporation and low rates of precipitation

In addition to salts, which of substance is dissolved in seawater?

nutrients

What unit is commonly used to measure the salt content in water?

parts per thousand (ppt)

What evidence indicates that salt content of ancient oceans was about the same as today?

seafloor sediments

Which of the following salts is most abundant in seawater?

sodium chloride

What is salinity?

the amount of dissolved salts in seawater