Vocabulary
An instrument for determining direction
Compass
A magnet that holds force for a limited amount of time
Temporary magnet
Minerals found in the Earth
Where magnets come from?
Both Earth's magnet and bar magnets
have two what?
poles: north and south
The sun's magnetic field causes
sun spots
The area around a magnet that has a pull
Magnetic force
A magnet that comes from the Earth
Natural Magnet
Most common mineral found in magnets
Iron
How do we know that Earth is magnetic?
A compass will line up with the magnetic field
To have a magnetic field, an electromagnet must be connected to
An electrical source
(nail, wire, and dry-cell battery)
The magnetic force that exists around a magnet
Magnetic field
A magnet that is hooked to a power source that can be turned off and on
Electromagnet
Three elements that stick to magnets
Iron, nickel, cobalt
True or False:
Both attract particles at the same locations
True
Formed when electricity flows
A magnetic field
When magnets push away from each other
Repel
A magnet that holds a force for a long amount of time
Permanent magnet
Magnetism come from...
Moving electrons which is called electricity
True or False:
Both magnetic fields are weakest at the poles
False
True or false:
The sun is magnetic
True
When magnets move toward each other
attract
A rectangular object that has a magnetic field.
magnetic rocks are called
lodestone
Earth's magnetic field extends to
space
What does M.R.I stand for?
Magnetic Resonance Imaging