Types of Friction
A student pulls their chair out from under the desk before they sit down.
Sliding friction
What is each end of a magnet called?
The north and south pole
What is the area of magnetic force around a magnet called?
The magnetic field
Tell me an example of something that uses electromagnetism.
Anything electric!
Ms. Jelks tries to move her desk by herself, but it stays in place.
Static friction
What areas of a magnet have the strongest magnetic force?
The poles
Draw a magnetic field
(drawing of magnetic field)
An electric motor uses an electric current to turn an ________
axle
You try to walk home from school on a windy day.
Fluid friction
What happens when a north pole is brought near a south pole?
They attract each other
How can you tell by the lines where the magnet's magnetic field is strongest?
The closer together the lines are, the stronger the magnetic field
Electromagnetism is when an ____________ produces a ____________
electric current, magnetic field
You ride a bike down the street.
Rolling friction
What happens when two south poles are brought near each other?
They will repel each other
Both have a north and a south pole with a magnetic field surrounding them
Can a magnetic field produced by an electric current be turned on or off?
Yes, by turning the electric current on or off
Does grass or ice have more friction?
Grass
Magnetic poles that are unlike will (attract or repel) each other and magnetic poles that are alike will (attract or repel) each other
Attract, repel
True or false: magnets cannot interact without touching
False- magnets can interact without touching
How can I increase the strength of a magnetic field produced by an electric current?
Adding iron, adding more coils, or increasing the current