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Construct a simple battery that can power a light.
Find order in well-mixed chaos.
Etch patterns on metal using saltwater and electricity.
Construct a simple hydrometer to compare the densities of solutions.
This density column always returns to its original three layers.
Make a simple battery that will light an LED.
Explore how different deodorants affect the bacteria in your armpit.
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Attribution: Exploratorium Teacher Institute
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