mag. elec review sheet
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24 terms
Terms | Definitions |
|---|---|
 magnet | a piece of stone, metal or ore that has the power to attract iron or steel magnets are often shapes of bars, horse shoes, disc, and circles. If you break a magnet in half, you end up with two magnets |
| permanet magnet | magnet that keeps its magnetism for a long time |
| temporary magnet | a magnet that keeps its magnetism for a very short time |
| poles | the ends of the magnet |
| compass | an instrument that shows the direction; used by pilots, salors, and hikers to find their way |
| force | the push and pull of a magnet |
| attract | to together pull |
| repel | to push apart |
| lodestone | a rock found in the earth that is a permanent magnet |
| magnetic field | the area around a magnet that you feel when you bring two magnets close together; it is invisible to the eye. |
| circuit | a path for electric current from the negative end of a power source to a positive end |
| closed circuit | a complete circuit where the electricity travels from the battery (source) through the wire, switch, bulb, and back to the battery |
| open circuit | a broken or incomplete circuit |
| charge | a mesure of the extra positive or negative particles that an object has |
| electric current | the flow of electric charges |
| switch | a device which may be used to open/close a circuit |
| conductor | a material that allows electricity to pass through it (copper or water for example) |
| insulator | a material that does not allow electricity to pass through it (examples include rubber and glass) |
| battery | a power source (we use d cell in are experiments |
| volume | the amount of space something takes up |
| 3 states of matter | solid, liquid, gas |
| describe the change in volume of matter | changes with temperature, resulting in a change in the state of matter. |
| how does matter change if heated | its volume will usually increase |
| If a solid, and gas is cooled | its volume will decrease |
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