1. Answer the Following Draw the domain of an unmagnetized bar magnet
Draw a magnetic field around a bar magnet
Design an experiment which would allow you to see a Magnetic Field
What are the two main categories of magnets? What is different about them?

2. Breaking a magnet
There are two major ways to lose a magnet’s magnetism:
Dropping or hitting it hard
Heating it up
These two things will knock magnetic domains out of alignment
Superconductors can keep magnets floating when kept cold enough to function ->

3. Magnetic Field Lines Invisible lines that surround EVERY magnet
Magnetic field lines will NEVER cross
Field lines always form a complete loop from North to South
Closer lines = Stronger Force

4. Biggest Magnet Around Earth
Strong magnetic field – so it produces magnets from ferromagnetic materials
Explains why there are so many naturally magnetic materials on
earth

6. Magnetic Declination Our magnetic poles don’t always stay put
Secular Variation is the movement of the magnetic poles over time
Magnetic Declination – angle between polar north and south and magnetic north and south
Secular Variation is ALWAYS occuring, so magnetic declination’s angle will ALWAYS change

7. Evidence of North Pole/South Pole Movement over years

8. WHO CARES?

9. Earth’s giant magnetic field protects us from the solar storms and solar winds that constantly affect us

10. Magnetosphere Solar wind – comes from sun Magnetosphere saves us
High speed particles shooting at earth
Magnetosphere saves us
Van Allen Belts – regions of protons and electrons moving at high speeds, trapped