Science 3/21
magnetic domain
a cluster of billions of atoms that all have magnetic fields that are lined up in the same way
ferromagnetic material
a material that shows strong magnetic effects
proton
a positively charged particle found in the nucleus
bar magnet
a simple rectangular magnet with a north pole at one end and a south pole at the other.
electron
a tiny negatively charged particle that orbits the nucleus
in a magnetized material
all or most of the domains are arranged in the same direction
Which object will be strongly attracted to a magnet?
an iron nail
magnetic poles
any magnet, no matter what its shape, has 2 ends
magnetic poles that are unalike
attract each other
magnetic field lines spread out from one pole
curve around a magnet, and return to the other pole
Ferromagnetic materials retain their magnetism
for a while after the magnetic field is removed.
magnetic field lines
map out the magnetic field around a magnet
element
one of about 100 basic materials that make up all matter
attract
pull together
magnetic poles that are alike
repel each other
Ferromagnetic
strongly attracted to magnets. o Ferromagnetic materials become magnetized when exposed to a magnetic field. o Ferromagnetic materials retain their magnetism for a while after the magnetic field is removed.
magnetism
the attraction of a magnet for another object
nucleus
the core at the center of every atom
permanent magnet
the magnet made of a material that keeps its magnetism
North pole
the part of a magnet that is attracted to the North Magnetic Pole of Earth.
South pole
the part of a magnet that is attracted to the South Magnetic Pole of Earth.
magnetic field
the region around a magnet in which magnetic forces act
atom
the smallest particle of an element that has all the properties of that element
repel
to push away
Magnetize
to turn into a magnet.
Ferromagnetic materials become magnetized
when exposed to a magnetic field.
Two N-S magnets are glued to a sheet of paper. Iron filings are sprinkled, and the table is tapped several times. Which image matches what the filings should look like?
Image A Explanation: The south pole of the magnet on the left is facing the north pole of the magnet on the right. These poles attract each other. So, the two N-S magnets will be attracted. Magnetic field lines will connect the south pole of the magnet on the left to the north pole of the magnet on the right. Image A is the only image showing magnetic field lines connecting the two magnets.
Which of the following is true about poles on magnets?
North poles attract south poles.
Based on the magnetic field lines shown, what is the orientation of the mystery magnet? (S connected to mystery)
S-N Explanation: The magnetic field lines do not connect the N-S bar magnet to the mystery magnet. This pattern indicates that the mystery magnet will be repelled from the N-S bar magnet on the left. A south pole is repelled by another south pole, so the south pole on the mystery magnet must be on the left, facing the south pole of the bar magnet. Therefore the mystery magnet is an S-N magnet.
What will happen to the two magnets below if they are released? (N connected to N)
The magnets will move further apart.