Mixing Soap with Water and Pepper
Students are shown a demonstration.The actual science happens because the soap breaks the surface tension of the water, like popping a balloon. It is the water that moves, not the pepper that is floating on it.
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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
New Review Water Pollution Cleanup
How do scientists determine the best method for removing pollutants from our water sources? Environmental scholars experiment with pollution clean-up options to discover which are the most cost-effective, fastest, and most thorough....
6th - 8th Science CCSS: Adaptable