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featured lesson
Measurements of conductivity
provide a general indication of water quality.
The investigating lessons provide opportunities to discover the same concepts and involve more problem-solving.
featured lesson
Effect of Photosynthesis and Respiration on Aquatic Chemistry
In this lesson you use microcosms and RUSS data to investigate changes in oxygen concentrations that result from photosynthesis and respiration.

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date last updated: Monday January 13 2020