A
Static electricity is caused when ____________ and _______________ charges are unbalanced.
positive, negative (can be switched around)
A negatively charged object will _______________ a positively charged object.
attract
Which of the following would be a good conductor?
a. wood b. plastic c. rubber d. copper
c. copper
A material that does not let electricity pass through easily is called ______________.
an insulator
What would happen to the other light bulbs in a series circuit if one bulb burns out?
the other light bulbs will go out
Where is a magnetic field the strongest?
at the poles
Why does a compass needle point in a north-south direction?
the needle is a magnet that responds to the Earth's magnetic poles
In a(n) ___________ circuit, electrical current flows in one path only.
series
In a(n) ________________ circuit, electrical current has two or more paths to follow.
parallel
_______________ results when positive and negative charges no longer balance.
Static electricity
A(n) ___________ ______________ is an electric charge in motion.
electric current
___________ is the force that pushes or pulls magnetic materials near a magnet.
Magnetism
The invisible field around a magnet is the magnet's ____________.
magnetic field
How is an electromagnet different from a magnet?
It has electric current strengthening the magnet.
Name the 3 ways you can make an electromagnet stronger?
1. wrap more coils of wire around the core
2. use a bigger core
3. use a bigger battery (energy source)
How is a series circuit different from a parallel circuit?
A series circuit allows the electric current to flow in one direction along one path. A parallel circuit allows the electric current to flow in 2 or more directions along two or more paths.
A switch should be ____________ for the circuit to be complete and electric current running through it.
closed
Which circuit (series or parallel) would be set up in your house? Why?
Parallel - because if one path is blocking electricity due to a light bulb burnt out (or something else), there would be another pathway to get the current around.
How many poles does a magnet have? What attracts what? What repels what?
2 poles - north and south. The opposite poles attract. The like poles repel one another. Ex. a north pole seeks a south pole and a north pole repels a north pole.
What would keep a compass from working properly and keep the needle from pointing to Earth's North pole?
A magnet near the compass would have the needle react to the magnet instead of the Earth's magnetic poles.