has a definite size & shape; particles packed together tightly; molecules move in a slow, constant motion; high melting boiling point
has a definite size & shape; particles more active and far apart; low melting point; lower boiling point than solid; active at room temperature
no definite size or shape; fills whatever container it occupies; particles move freely & are far from each other
Water freezes at???????
320 F or 00 C
Water boils at????????
2120 F or 1000 C
change from a liquid to a solid state, caused by a lowered temperature
solid to a liquid state, caused by raising the temperature
liquid to a gas state, caused when the liquid is heated
gas to a liquid, caused by a lowering of temperature
solid to a gas without going through a liquid state
the energy resulting from the flow of electrons
results when an object has to many or to few electrons
have a positive charge
have a negative charge
an electric charge build up in one place
something that allows electricity to flow through it easily
a substance that is a poor conductor of electricity
a steady flow of electrons or other charged particles through a conductor
a flow of electrons in one direction such as in a battery
Direct Current (DC)
current that changes directions
Alternating Current (AC)
the difference in energy between the electrons in one place and the energy in the electrons in another place
how hard it is to push electrons through a conductor
rate at which a device changes electricity into another form
the energy used by an electrical device. The amount of energy depends on the amount of power delivered and the length of time the power is used.
an unbroken path formed by electrical conductors. In order to flow, a current must have and uninterrupted loop of electrical conductors. The electricity will flow from negative to positive ternminals.
has only one path for the current to follow. The current is the same in every part of the circuit. If any part of the circuit is broken, the current stops. (Christmas tree lights, if one goes out they all go out)
two or more separate branches for the current to flow. If the circuit is broken in one branch, the current will still flow to other parts of the circuit. (house electricity)
a device on a circuit that can open and close the pathway to start and stop the flow of electricity (When the switch is open, there is no flow. Closed- no flow)
an object that attracts other magnetic materials
substances that can be made into magnets by running electricity through them. To strengthen this, you can add more loops or increasing the current in the wire.
the opposite ends of a magnet. The magnetic force is strongest at these locations. The poles are labeled north and south.
the magnetic effects of a bar magnet are strongest near the....
sprinkling iron filings over a bar magnet shows the magnet's....
b. field lined
d. all of the above
d. all of the above
The area around teh magnet in which magnetic forces can be felt is called the magnetic.....
a push or pull
to pull together
to push away
the region around the magnet where the magnetic force acts. This region is near the poles, but extends out from the actual