Pathogens: Pollutants and Water Contamination
Students identify a list of pollutants affecting Galveston Bay, distinguish between point and non-point source pollution, and identify ways to reduce pollutants in Galveston Bay.
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Using Water Chemistry as an Indicator of Stream Health
Will this water source support life? Small groups test the chemistry of the water drawn from two different sources. They then compare the collected data to acceptable levels to draw conclusions about the health of the source. The...
8th - 12th Science
Water Purification by Evaporation and Condensation
This easy-to-perform demonstration shows students how the water cycle, specifically the processes of condensation and evaporation, purifies Earth's water supply. Just mix up some water, dirt, and gravel in a glass bowl, place a cup in...
4th - 7th Science