Electrons, Very small parts that move and create electricity., Atoms, Very small building blocks of everything., Nucleus, The center of an atom., Static electricity, Electricity that builds up and can give small shocks., Electric current, Moving electrons in a wire., Voltage, What makes electricity move., Volt, A unit that measures voltage., Lightning, Very strong static electricity in the sky., Power lines, Wires that carry electricity., Conductors, Materials that let electricity pass., Insulators, Materials that block electricity., Closed circuit, A complete path for electricity., Switch, A device that turns electricity on or off., Series circuit, Parts connected in one line., Parallel circuit, Parts connected in separate paths., Circuit diagram, A picture showing how a circuit is connected., Short circuit, When electricity takes a dangerous shortcut., Fuses, Safety devices that stop electricity if something goes wrong..

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