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Further Investigations

1. Make a circuit that has a switch to turn a light on and off. One way to make a switch is to make two holes in a piece of cardboard that are the length of the paper clip apart. Insert a paper fastener through a paper clip and then through the cardboard. Insert another paper fastener through the other hole. Wires from your circuit can be connected to the paper fasteners. A drawing of a switch is shown.

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2. Make a circuit with 2 holiday bulbs in series and measure the voltage of the battery or batteries. Then measure the voltage across each bulb. Add another bulb to the circuit so that you have 3 bulbs in series. Measure the voltage across each bulb. Add another bulb so that you have 4 bulbs in the series. Measure the voltage across each bulb. Record your results in the table below or with your own table. Do you see any patterns with the voltage across the bulbs? Explain.

   battery voltage
   2 bulb circuit	bulb 1	bulb 2
   3 bulb circuit	bulb 1	bulb 2	bulb 3
   4 bulb circuit	bulb 1	bulb 2	bulb 3	bulb 4

   
   
3. Make a circuit that will light a bulb and make a motor run. Think of something that you use at home that lights a bulb and makes a motor run.