A circuit is a complete path around which ____ can flow. It must include a ____ of electricity, such as a ____. Materials that allow electrical current to pass through them easily, called ____, can be used to link the positive and negative ends of the battery, creating a ____. In an open or ____ circuit, there's a break along the line, and the ____ stops. In a closed or ____ circuit, electric current can flow. When electric current ____, it can be used by electrical ____, such as light bulbs.

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