Shape of magnets

Bar,ring,circular,u-shape, Horseshoe,cylindrical

Handling magnets

-should not be heat, knock, drop

-Needs a keeper

Strengths of magnets - strong, weakMagnets

Attract some materials -paper clip,thumbtacks ( iron or steel )

Not attracted some materials

-wood,plastic,glass,paper

Attract or repel -(N+N=repel)

-(N+S=attract) -( S+S=repel )

Uses of magnets -Compass,refrigerators

pencil case -Hand bag

QUESTIONS

1. Which of these objects can be attracted by magnets? A. straw B. leaf C. pin

2. When a bar magnet is placed close to another bar

magnet they pull each other together. We say that …………

2. Why do some magnet become weak ?Some magnet became weak because it was heated,knocked and dropped.

4.