At the end of this activity, students should be able to: û explain how the oceans were formed û explain the origin of salts in the oceans û list the characteristic properties of sea water û list the most abundant ions in sea water û discuss the concentration of salts in oceans û discuss salinity balance û discuss the role of the oceans in maintaining the composition of the atmosphere û discuss the economic importance of the oceans.

Originally released by Learnetic, 2016.