| Term | Definition |
| Electrons | negatively charged subatomic particles |
| Neutrons | subatomic particle with no charge |
| Protons | subatomic particle with a positive charge |
| Atom | building block of all matter |
| Attract | to pull toward |
| Repel | to push away |
| Electric Charge | charge obtained by an object when it gains or loses electrons |
| Electric Circuit | any closed path along which electrons can flow |
| Electric Current | for or electrons from negatively charged objects to positively charged objects |
| Series | circuits in which all components are connected in a single pathway |
| Parallel | circuit in which each component is on its own pathway |
| Conductor | material that does carry electrons easily |
| Insulator | material that does not carry electrons easily |
| Electromagnet | temporary magnet made by passing an electric current through a wire coiled around an iron bar |
| Thermal Energy | the knetic energy of molecules (movement) |
| Heat | transfer of thermal energy from one substance to another |
| Radiation | transfer of thermal energy by electromagnetic waves |
| Convection | transfer of thermal energy by movement of gases or liquids |
| Conduction | direct transfer of thermal energy between objects that touch |
| Reflection | light energy that bounces off objects |
| Refraction | the bending of light rays as they pass through a substance |
| Vibration | back and forth movemnet of molecules |