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[Free Registration/Login Required] Students test water from multiple locations on the Potomac River for dissolved oxygen, nitrates, phosphates, pH levels, salinity, and turbidity. What do these tests tell us about the health of the river? Related videos on land use and species diversity allow us to look at the river through different lenses. [13:41]
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- Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
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