Vocabulary
What is an object that has the property of attracting certain metals?
Magnet
At a magnet's poles
What can be thought of as a giant magnet?
The Earth
What has a negative charge?
Electrons
What is a current-carrying coil of wire with many loops wrapped around a magnetic rod?
Electromagnet
A tool that uses a magnet to determine direction
Compass
What will opposite poles do when brought together?
They will attract
What happens if you cut a magnet in half?
You will have two magnets, each with a north and south pole.
How can you magnetize a piece of iron?
By rubbing it with another magnet or holding it close to a very strong magnet
What happens to an electromagnet if the circuit is broken?
It will no longer work.
A group of atoms whose magnetic fields are lined up in the same direction
Domain
What will like poles do when brought together?
They will repel
Why will a compass always point to the north pole?
The end of the needle is attracted to the geographic north pole.
You can drop it or heat it to a certain temperature
An electromagnet will only work if what is flowing?
Magnetic force
Magnetism is produced by moving ________ charges
Electric
The strength of two magnets' attraction or repulsion depends on what?
Distance
What is the magnetic liquid called?
Ferrofluid
How is the strength of an electromagnet determined?
How many loops there are and how much current is passing through
What is the area around a magnet in which magnetic force is exerted?
Magnetic field
Why will one magnet lowered into a bucket of nails pick up a chain of nails?
The magnetic force of the magnet, temporarily magnetizes the magnet
What will happen when a magnet enters a magnetic field?
It will naturally line up with the magnetic field
BONUS!!
What body system supports your body and gives you shape?
Skeletal
What are two things that use electomagnets?
Scrap machines, car motors, stereo speakers, hair dryers, refrigerators, telephones