mag. elec review sheet

24 terms by bjpember 

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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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