1. Magnetism Created By: Mr. Mossey

2. Magnetism  Force of attraction or repulsion of a magnetic material due to the arrangement of its atoms  Dependant on atomic structure

3. 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

4. Magnetic Field  Region in which magnetic forces act  Can be represented with lines  Forms complete loops from north to south poles

5. 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

6. Magnetic Domain  Groups of atoms with electrons that align themselves in one direction  This results in regions of grouped magnetic fields

7. 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

8. 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

9. 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

10. 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)