In Petits Princeps we have been experimenting with a set one student brought to school. It was a quite simple connections with wires and Copper and Zinc plates. The first experiment it was connecting all the things to two potatoes and a clock. Then we saw the clock working. At that point we formulate our hypothesis. How could that generate electricity?
Later we made the same experiment but changing the potatoes for two cups filled with water. The clock was working agan. Some of us speculate with the fact that water is a good conductor. However, when we tried to connect the plates directly surprisingly the clock wasn’t working.
In the end we deduced there was a chemical reaction between Copper, Zinc and water.
We really enjoyed the experience and we are really looking forward to repeat the experience.
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