Circuts

It is a dark room with no light, someone lights a candle to brighten the scene. Generations later you just flip a switch to power a light bulb. What is making this work? Well inside a lightbulb is a bunch of wires and batteries making something called a circuit. The main parts of a circuit are positive and negative wires, a light bulb, a switch and a battery.

A circuit works because when it is closed the atoms flow from the battery through the wire through the lightbulb to turn it on.

Circuits go inside of things like a flashlight to turn them on.

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