magnetism created by: mr. mossey. magnetism force of attraction or repulsion of a magnetic material...
TRANSCRIPT
Magnetism
Created By: Mr. Mossey
Magnetism
Force of attraction or repulsion
of a magnetic material due to the arrangement of its atoms
Dependant on atomic structure
Magnetic Poles Either north or south, these are the areas where magnetic effect is the strongest
Always appear in pairs
Like Poles = Repulsion Different Poles = Attraction
Magnetic Field
Region in which magnetic forces act
Can be represented with lines
Forms complete loops from north to south poles
Magnets
Permanent Magnets Do not lose charge easily
Can be made of
nickel & cobalt
Temporary Magnets Lose charge easily
Can be made of soft iron
Magnetic Domain
Groups of atoms with electrons that
align themselves in one direction This results in regions of grouped magnetic fields
Magnetic Domain
Each group is a magnetic domain (group of atoms with aligned electrons).
Cancel each other out
Subjected to a field all the magnetic domains line up creating a magnet
Additive
Note: You can even destroy a permanent magnet by forceful rearrangement of the magnetic domains
Earth Magnet William Gilbert = first to propose Earth as a magnet
Earth exerts a magnetic force and is surrounded by a magnetic field.
Earth poles do reverse as told by hardened molten rock
Compasses North pole of a compass must point to magnetic south pole
Results in north pole being next to magnetic south pole
Magnetic Variation is the difference between geographic and magnetic poles
Weakest at the equator
Jupiter, Saturn, and the Sun also produce magnetic fields
Solar Wind Charged particles sent out by the sun
Magnetosphere Region of Earths magnetic field
Blocks solar wind from damaging Earth
Van Allen Radiation Charged particles that penetrate the magnetosphere and cycle between the poles
When close to the atmosphere they cause the air to glow (Aurora)