1.  Magnets have a north pole and a south pole.

2.  Underline:  (Opposite/Similar) poles repel.  (Opposite/Similar) poles attract.

3.  Draw magnetic field lines on the bar magnet below (pg. 518/519):
 
 
 
 
 

4.  Draw and label  the Earth showing magnetic field lines, Geographic Poles, and Magnetic Poles (pg. 523):
 
 
 
 
 
 
 
 
 
 

5.  Ferromagnetic - a material with Iron, Nickel, or Cobalt; strong magnetic properties

6.  Paramagnetic - the weak magnetic properties of metals other than those in #5

7.  Diamagnetic - the magnetic properties that all matter has; may be very weak

8.  Permanent Magnet - a material that keeps its magnetic properties

9.  What are alloys?  Are they magnetically stronger or magnetically weaker than pure metals?  a mixture of 2 or more pure metals; stronger

10.  What occurs within an atom that causes magnetic properties?  Explain.  Electrons spin left or right like a top.  If all or most electrons spin in the same direction, the material has strong magnetic properties.  If the number spinning left equals the number spinning right, the material has very weak magnetic properties.

11.  Magnetic Domain - clusters of atoms lined up magnetically

12.  Draw an unmagnetized and a magnetized metallic bar showing magnetic domain alignment(s) (pg. 520):

13.  How do you make a Ferromagnetic material exhibit magnetic properties? hold it still and strike it or heat it in a magnetic field; rub w/ a magnet; wrap with a charged wire

14.  How do you make a Magnetic material loose it's magnetic properties? heat it and let it cool in various positions; drop it repeatedly

15.  How do you make an Electromagnet? wrap an insulated wire into a coil and put current through the wire; ferromagnetic materials in the coil's center will make it stronger

16.  Electromagnets work because of current/electron flow in a coiled wire.

17.  What is the Curie Point? the temperature at which a material looses its magnetic properties

18.  Solar Wind - plasma released from the sun because of VERY high temperature

19.  What do we call solar wind funneled into Earth's magnetic field at the North Pole? aurora borealis or northern lights   South Pole? aurora australis or southern lights

20.  How do birds and magnetism relate? scientists believe that birds have a material in their brains which act as an internal compass to help them migrate south for the winter

21.  Where are magnets use in your life or your family's life (give at lease 8 examples)? compass; bullet train; MRI; Doorbell; can opener; audio tape; speaker; telephone; atm/credit card; microphone; refrigerator magnets; etc.