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Lava Lamps
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Learners observe working lava lamps to understand how they work (included in PDF link).
Electrolysis
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Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.
Build a Battery
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Learners build a simple one-cell battery and use an ammeter to measure the flow of current.
Electrolysis
Source Institutions
Using electrolysis, learners produce hydrogen gas and oxygen gas from water molecules in a solution.