| Term | Definition |
| gravity | the attraction due to two masses |
| magnetism | the class of phenomena exhibited by a magnetic field; the study of magnets and their effects |
| magnetic poles | either of the two points at the end of a magnet where the magnet's field is most intense |
| magnetic field | the force the field exerts on a moving charged particle, such as an electron |
| electricity | energy created by moving charged particles |
| circuit | a route around which an electrical current can flow, beginning and ending at the same point |
| switch | a device that opens, closes, or changes the connections in an electrical circuit |
| interrupt | to cause a break in the flow of something or put a temporary stop to something |
| conductor | a material or device that allows heat, electricity, light, or sound to pass along it or through it |
| insulator | a material or device that prevents or reduces the passage of heat, electricity, light, or sound |
| symbol | something that stands for or represents something else |
| troubleshooting | finding the source of an error or problem |
| series circuit | a circuit in which the current is not split |
| parallel circuit | a circuit in which the current is split in at least one place |
| property | a distinguishing characteristic of something or somebody |
| voltage | quantitative expression of the potential difference in electrical charge between two points in an electrical field |
| filament | a slender strand or fiber of a material; used in light bulbs |
| continuous | without interruptions |
| short circuit | a circuit with an excess of current |
| device | a tool or machine designed to perform a particular task or function |
| attract | to draw objects nearer |
| repel | to exert a force that tends to push something away |
| battery | connected electric cells that produce a direct current through the conversion of chemical energy into electrical energy |
| positive charge | charge greater than zero; ex: proton |
| negative charge | charge less than zero; ex: electron |
| Semiconductor | a material or device that is neither a good conductor nor a good insulator |