1. Ocean Motion 17.1 Ocean Water

2. I.Oceans and You II.Origin of Oceans A.Earth used to be more volcanic B.Volcanic explosions include lava, ash, water vapor, carbon dioxide, and other gasses. C.Water vapor condensed into storm clouds. D.Oceans were formed when torrential rains filled low areas. E.Basins – low areas on Earth

3. III.Composition of Oceans A.70% of Earth’s surface is covered by ocean water B.Water can not be used for drinking water because of salts. C.Chloride, sodium, sulfur, magnesium, calcium, and potassium. D.Salts come from rivers and groundwater that slowly dissolve elements.

4. E.Salinity a.Most abundant salts are sodium and chlorine b.Sodium and chlorine combine to form Halite (rock salt) c.Salinity – the measure of the amount of slats dissolved in seawater. d.Oceans have 35g of salts for 1kg of water (3.5%) F.Element Removal a.Oceans are considered to be in a steady state. b.Removal of elements from biological processes or by becoming sediments.

5. G.Desalination a.The process that removes salt from ocean water b.Seawater evaporates, salt is left behind c.Continuing to develop technology to desalinate water. Pg. 497 1-4