| A | B |
|---|
| magnet | material that attracts iron, cobalt, and nickel |
| magnetism | the force or pull of a magnet on metals |
| magnetic poles | places on a magnet where magnetism is the strongest |
| magnetic field | the space around a magnets where force is exerted |
| domain | magnetic fields of atoms in certain areas line up with one another |
| temporary magnet | domains do not stay lined up after the force is removed |
| permanent magnet | domain stay lined up |
| electromagnet | device that becomes a temporary magnet when electric current is supplied to it |
| galvanometer | instrument that measures electric current |
| electric motor | changes electric energy into kinetic energy and mechanical energy |
| generator | machine that uses changing magnetic fields to produce electric current |
| electrochemical cell | devices that supply electric energy through chemical reactions |
| dry cell | battery contains pastelike materials that undergo chemical changes |
| wet cell | battery that contains chemicals in liquid form |
| direct current DC | electrons move in one direction |
| alternating current AC | Current in which electrons move back and forth usually 60 times per second |
| transformers | increase or decrease voltage of AC |
