| A | B |
| Insulator | Something that keeps electricity from passing through |
| Conductor | Something that transmits heat or electricity very well |
| Current | The flow of electricity |
| Circuit | A complete path in which electricity flows through |
| Open Circuit | An incomplete circuit, it will not work |
| Closed Circuit | A complete circuit, it will work |
| Switch | A device that can open or close a circuit |
| Battery | Energy source for a circuit |
| Wires | A conductor that connects the battery to the light bulb |