| Term | Definition |
| charged | term referring to matter having an excess of electrons (a negative charge) or a deficiency of electrons (a positive charge) |
| electric charge | a property of matter having an excess of electrons (a negative charge) or a deficiency of electrons (a positive charge) |
| static electricity | term referring to electric charges that are stationary, or at rest |
| electrostatics | the study of electrical charges that move very little |
| neutral | term referring to matter having neither a negative nor a positive electric charge |
| electric charge | a property of matter having an excess of electrons (a negative charge) or a deficiency of electrons (a positive charge) |
| insulator | a material that does not allow electric charges or heat to move freely on or through it |
| conductor | a material that allows electric charges or heat to move freely on and through it |
| law of attraction and repulsion | a law stating that like electric charges repel and unlike electric charges attract |
| positive charge | charge carried by protons |
| negative charge | charge carried by electrons |
| electroscope | a device for detecting the presence of electric charge |
| induction | the process by which an object having an electric charge produces the same charge in a neighbouring object without actually touching it |
| spark | an electric discharge; caused by electrons jumping from one conductor to another through the air |
| ground | to connect a conductor through some conducting material directly to the ground, or Earth |
| lightning | in the sky, a flash of bright light caused by the discharge of electricity between clouds, or between clouds and the ground |
| lightning rod | a metal rod or wire attached to a building to prevent lightning damage by conducting the electrons to the ground |
| electrostatic precipitator | a device to control air pollution using stationary electric charges (not currents) |