1. Magnetism

3. 1. Magnetic Force Repel or attract
Stronger force as magnets move closer together
Force weakens as magnets move away from each other

4. 2. Magnetic Field Field exerts the magnetic force
Strongest close to the magnet

5. 3. Magnetic Poles
All magnets, regardless of shape, have a north and south pole
Area where force is strongest
Magnetic field lines connect the two poles

6. 4. Magnets Interact
Two north poles repel each other; two south poles repel each other
North and south poles attract each other

7. 5. Earth’s Magnetic Poles
Earth’s magnetic south pole is located in Canada
Opposite of what you think when you look at a map or globe

8. 6. Compass Shows direction Needle is a bar magnet
North pole of the needle will point toward the Earth’s magnetic south pole (page 229)
Needle lines up to field lines

9. 7. Magnetic Materials
Magnets are attracted to iron, cobalt, and nickel
In these atoms, electrons and protons do not cancel out…so these atoms have their own magnetic fields

10. 8. Temporary Magnet Domains
Magnetic domains (N/S) are random until magnetized and then they line up (page 231)

11. 9. Permanent Magnets Magnetic material in a strong magnetic field
Domains are permanently aligned
(Looses strength if dropped or heated – causes domains to come out of alignment)
Broken in two – new poles are created