Christmas Light Webquest

Hallie Patrick

Testable Question

How does the type of circuit affect the strand of Christmas lights with a burned out bulb?

IV and DV (Test 1)

In test 1 the IV is the parallel circuit and the DV is light.

IV and DV (Test 2)

In test 2 the IV is the series circuit and the DV is light.

Hypothesis 1

If the Christmas lights are arranged in a parallel circuit then when one bulb bursts (is removed) the other bulbs do light up.
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Observations

I noticed that all bulbs lit up brightly when no bulbs were burned out.
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Observations

I noticed that when one bulb was burned out the others still ran, but they were dim.

Hypothesis 2

If the Christmas lights are arranged in a series circuit then when one bulb bursts (is removed) the other bulbs do not light up.
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Observations

I noticed that all bulbs lit up dimly when no bulbs were burned out.
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Observations

I noticed that no bulbs lit up when one bulb was burned out.
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Conclusion

A parallel circuit is the best series to use for Christmas lights because it stays lit and is brighter.