| A | B |
|---|
| attract | to pull together |
| circuit | unbroken path of an electrical conductor that allows electrical current to flow from the power source and back again |
| closed circuit | a circuit with no breaks or interruptions |
| conductor | material that permits electric charge |
| current | continuous flow of electrons |
| dry cell | a battery that changes chemical energy into electrical energy |
| electrical energy | energy related to the movement of charged particles; electrical energy comes from batteries and power plants. |
| electricity | anything involving electric charges, but usually refers to static, direct current, and alternating current electricity |
| electromagnet | a magnet produced by an electric current, usually a core of iron wrapped in a conductor |
| electron | a subatomic particle with a negative electrical charge |
| insulator | material that does not permit electric charge to pass through it |
| radiant energy | energy obtained from light sources; examples: the sun, laser beams |
| magnet | a device that attracts other magnets, iron containing materials, and other metals such as nickel |
| magnetic field | the invisible field that carries magnetic force to other objects |
| mechanical energy | energy of motion; (ex: wind, water in a waterfall, and a jet plane speeding through the air have mechanical energy; sound is a form of mechanical energy) |
| open circuit | a circuit with a break in it |
| repel | to push apart |
| resistance | a measure of how well a given material will conduct electricity. Good conductors have little resistance. Light bulbs have a higher resistance. Insulators have a very high resistance. |
| static electricity | the buildup of electrical charges on a surface produced by contact and separation of dissimilar materials |
| switch | a device that can open or close an electric circuit |
| thermal energy | heat energy caused by moving particles |
