WATERS Mini Lesson

60 ml sample water (collected from local water body) 200 ml deionized water. 1 incubator set to 35 degrees Celsius. Teacher pre-lesson procedure per group per water sample: Gather 5 test tubes with clear caps, 5 test tubes with blue caps, and 5 test tubes with yellow cap. Place all test tubes in test tube rack. Invert duran tubes into each test ... ................
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