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Click here to search for other assets Geographic Variation in Salinity Grade level: K-4 Theme: water cycle Video: salty_regions.flv
And also in the middle of our subtropical gyres. A gyre is a current system that moves around in a circle. The "subtropics" means that it is located in an area around 30 degrees (north) latitude all around the globe. That area is where we have very strong evaporation. That evaporation means that we lose fresh water from the surface. And we lose more fresh water from the surface than we actually gain through precipitation. That area is what we call "the ocean deserts". Now on the fresh side, we have very fresh water near the coastlines and that's because we have the river waters flowing in. And we also have fresh water near the high latitudes where we have ice. Student Outcomes After viewing this video, students should be able to: Explain that evaporation can separate the water from the salt in salt water. (W: K-4) Key: C = climate / O = ocean circulation / T = 21st century technology / W = water cycle |