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Canyon
Grade 4
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Electrical Pathways

A light bulb is a ball of . Most of the inside a light bulb has been removed. The base can be screwed into a metal , which is a good conductor. Electricity flows through a conductor, but not through a(n) . Current flows through a thin wire called a(n) . The filament is not a good . It is a resistor. Current does not flow easily though a(n) . This resistance absorbs some of the current, causing the filament to get so hot it glows. This is how the bulb creates and light.