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You have already learned how to connect a circuit with a battery, bulb and aluminum foil. Now determine how to make a series circuit and a parallel circuit with a switch.
Series Circuit: Remember in this case, one wire connects two (or more bulbs). A switch between the battery and bulbs will turn on/off both bulbs. For a switch, you can create a separate section of foil that can be bent to complete the circuit.
Sketch of your Series Circuit:
Parallel Circuit: In this case, addition wire is used so that the bulbs can have separate switches. Turning one switch off will not affect the other bulb. You may need more foil to create this circuit.
Sketch of your Parallel Circuit:
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