Ocean salinity is usually expressed in charts and graphs chemical formulas parts per billion parts per thousand

parts per thousand

Explanation:- Salinity is the total amount of solid material dissolved in water.

1. Charts and graphs are used to represent a set of numerical  data in pictorial form.

2. Chemical formulas is the formula which depicts the number of atoms of each element present in  a substance.

3. parts per billion is used to express the concentration of very dilute solutions.It is used when 1 part of the solute is dissolved in parts of the solution.

4. parts per thousand is used to express the concentration of dilute solutions. It is used when 1 part of the solute is dissolved in 1000 parts of the solution.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

satellites are frequently used to make observations of the orbit on earth