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3. Water Going Up, Water Going Down

Estuaries 101 Middle School Curriculum
Tides and tide-like water level changes can greatly affect the nation's estuaries. Water normally moves into and out of estuaries through the estuary's "mouths," or areas that open out into the ocean or lake. High water levels keep the estuary mouths very open and wide, whereas low water levels may cause the mouths to become closed due to sediment and sand movements. Read more


Photo of Anne Marie TiptonAnne Marie Tipton of the Tijuana River NERR in California recommends Shifting Sands activity from the book Waves, Wetlands, and Watersheds: California Coastal Commission Science Activity Guide. See page 21 of the Teacher Guide for information about incorporating this activity into your study of estuaries.

Download the Shifting Sands activity by the California Coastal Commission (used with permission).


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