MAGNETISMHistory, Magnetic Poles and Domains

Objective:To understand magnetic properties

MAGNET- ANY MATERIAL THAT ATTRACTS IRON OR THINGS MADE OF IRON

KINDS of MAGNETS

PermanentMagnets that are able to attract iron for a long period of time

TemporaryMagnets that are can be turned on and off or only last for a very short time

Will my magnet stick to ...... ?

Bad news for tuba players. Magnets do not stick to brass, stainless steel, aluminum, copper or tin

-- so you cannot display them on your tuba, stainless steel fridge, Pepsi or vegetable soup cans.

You can, however, display them on most other refrigerators, washers, dryers, dishwashers, steel file cabinets, toasters, lockers, and other steel or iron objects.

Magnets stick to iron and steel

Magnetism How does a magnet work?

• Magnetism is the force of attraction or repulsion of a magnetic material due to the arrangement of the electrons.

Groups of electrons are

called domains If the domains can line up, that determines if the object is magnetic.

Which domain is magnetic?

Understanding domains

• If these are electrons in a material, is the material magnetic? Why or why not?

Understanding domains

• If these are electrons in a material, is the material magnetic? Why or why not?

Opposite poles attract-Electrons moving in same direction

Magnets break apart to make smaller magnets

How does a magnet work?

Homemade Compass

                                                                                                    

Make a compass