Having got our circuits working successfully we posed the question 'What if we want to turn the bulbs on and off?' We knew we would have to make a break in the circuit and put in a sort of switch. Here we are investigating two sorts of home made switches.
We wondered if different materials could be used to make switches. We tried plastic, card, glass and rubber but they didn't work because the electricity couldn't travel through them. The best conductors were the tin foil, the paper clip and the scissors because they were made of metal.
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