| A | B |
|---|
| insulator | a material through which electrons cannot pass easily |
| single - throw switch | close a circuit in only one position; the light in the classroom - up is on and down is off |
| knife switch | an electric switch with metal blades that are pushed back to make contact |
| energy | the ability to do work; energy brings changes to systems or surroundings |
| electrical circuit | when an electric current is used to transfer energy |
| thre-way switch | a configuration of double throw switches that allows for independent control of an electrical device from two positions; switches at each end of the hall way that both control one light |
| circuit | consists of a source of electrical energy;, an energy receiver, and a path that connects the two through which a current can move |
| open circuit | an incomplete path for electric current; electrons cannot flow through it |
| battery | two or more electrochemical cells connected together |
| closed circuit | a complete circuit through which electrons (electric current) can flow |
| switch | a device used to open and close a circuit |
| electric current | a continuous flow of electrons |
| circuit diagram | a representation of an electrical circuit using symbols |
| parallel circuit | a circuit in which there is more than one path for a current to follow |
| series circuit | a circuit in which there is only one path for a current to follow |
| Galvanometer | a device that is used to detect electric current |
| kinetic energy | the energy of motion |
| motor | a device inwhich the magnet interacts with the magnetic field of a current-carrying wire and cause rotation |
| resistor | a device that makes the passage of current difficult |
| resistance | a measure of material's ability to hinder the passage of electric current through it |
| electroscope | a device used to detect static charges |
| static charge | the electric charge that resides on an object |
| conductor | a material (usually a metal) through which electrons can pass easily |
