And yet, there is much that students can learn about oceans through research and investigation. Within every 1000 grams of ocean water there are 35 grams of salt, mostly sodium chloride or table salt, and 965 grams of water. Ocean water is warmed at the equator and cooled at the poles. This warming and cooling causes the water to move, creating a motion beneath the surface called ocean currents. Surface ocean currents, on the other hand, are caused by the wind.
Waves ride on the surface ocean currents, circumnavigating the earth at times.
The oceans and their relationship to the continents which they surround offer countless opportunities for geographic exploration through the science curriculum. Allow students to change their answers as you correct them. Pacific, Atlantic, Indian, Arctic 2. Have students make bar or pie graphs representing these percentages. Locate the four major oceans on a map of the world.