Sept 11th: Magnetism
Objective:
SWBAT define magnetism and draw magnetic field
lines
Do Now:
1. What are negatively charged particles called?
Where are they located?
2. What subatomic particles are responsible for
magnetic fields?
3. Which side of a magnet is repelled by S?
Daily Forecast
 Do Now (5 min)
 Magnetic Fields (10 min)
 Magnetic field lines (15 min)
 Exit Ticket (10 min)
Magnets
 All magnets have two poles.
 North
 South
Opposite charges attract
Like charges repel
Activity
 Draw what you see in your notebook.
 Show the magnet and the iron shavings.
 Why does the iron align in this
particular way?
Magnetic Field
 Magnetic Field
An
area around a magnet or electric
current
Generated when electrons move
through space due to a magnetic
material or
Magnetic Field
 Can you see the magnetic field around
your magnet?
 Draw what your field looks like in your
notebook.
Magnetic Field Lines
Magnetic Field
 Now, try your experiment again, but
this time draw your magnetic field lines
on your sketch in your notebook.
Magnetic Field
Repel:
 This time, try holding the two N sides of
your magnets together underneath the
metal shavings.
 Sketch what you see. Draw the
magnetic field lines.
Magnetic Field
Attract:
 This time, try hold the N side of one
magnet to the S side of another.
WITHOUT touching each other.
 Sketch what you see.
 Draw your magnetic field lines.
Let’s See How We Did!
LOOK AT YOUR
SKETCHES, AND
COMPARE THEM TO THE
PICTURES ON THE SLIDE
Attraction
Repulsion
Exit Ticket
1.
2.
3.
4.
Which will attract a N pole?
Which subatomic particles cause
magnetism?
Draw the magnetic field lines on a bar
magnet that show attraction.
The earth acts similar to a large magnet
with a N and S pole. Draw the magnetic
field lines of the earth.
Exit Ticket
1.
2.
3.
4.
South
electrons