# Christmas Light Webquest

## 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.

## Observations

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

## 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.

## Observations

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

## Observations

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

## Conclusion

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