| A | B |
| D-Cell | the source of electric energy |
| Battery | more than one cell |
| Electricity Source | provides the energy to light the bulb |
| Electricity Receiver | a component that uses the electricity from the source to make something happen |
| Circuit | a pathway for the flow of electricity |
| Filament | the part of the bulb that gets hot and produces light |
| Component | any part of the circuit; wires, D-cell, bulbs |
| Circuit Base | holds many components needed to build a circuit |
| Fahnstock Clip | a metal clip that connects wires in a circuit |
| Switch | a device used to open and close circuits |
| Open Circuit | an incomplete circuit through which electricty will not flow (off) |
| Closed Circuit | a complete circuit through which electricty will flow (on) |
| Schematic Design | a way to represent a circuit on a piece of paper |
| Conductor | a substance that allows electricty to flow through it (copper, aluminum, a nail) |
| Insulator | a material that will not allow electricity to flow through it (plastic, rubber, glass, air, a straw) |