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

Independent Variable- How many light bulbs used and what kind of circuit we use.

Dependent Variable-Whether the light bulbs light up when one was removed.

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

I noticed when the bulbs were added it connected the wires and the bulbs lit up. The brightness was very high.

I noticed when the bulb was  removed it didn't affect the other light bulbs. The others were jut as bright as when they were first lit. It only made the wires connected to the "busted bulb" stop working.

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

I noticed that when the bulbs were placed in a series circuit they were not as bright as when they were in a parallel circuit. I noticed that the bulbs were all connected by one wire.

I noticed that when one bulb "burst" all of the bulbs went out. They did not stay working like the parallel circuit.

I conclude that a parallel circuit is the best series to use for Christmas lights. A parallel circuit is the best because when one bulb is removed the other bulbs will not be affected by it. Also the brightness for the parallel circuit was a lot more than the brightness for the series circuit. This will  cause the Christmas lights to last longer.

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