Magnet

How Magnet Interaction occurs????

a. Over hundreds of years, we know the usefulness of magnets. Some objects respond to a given magnetic force, or interested in, but there are not affected. What are the things that can be affected by magnets?

b. Tools and Materials
• A bar magnet
• tacks (be careful, ask an older person to help you)
• A pencil
• An eraser
• A sheet of paper
• Knife (be careful, ask an older person to help you)
• Lock
• Coins
• Fabric former
• Comb
• Equipment aluminum
• A piece of tape marks

c. Experimental procedure
Batangmu magnetic touch to each item. Any item that attracted and attached bar magnet? Any item that is not attracted by a magnet?
Record results in the table below with the following inscription marking yes to things that are attracted by magnets or not to objects that are not attracted by a magnet. Write down also from what material objects are created in the table labeled material. Try it with other things!

d. Discussion
Do you find that the only thing that comes from the iron and steel are attracted to a magnet? Apparently magnet also attracts cobalt and nickel.
Generally magnet made ​​of iron and steel, is also usually mixed with other materials such as cobalt and nickel. But some magnets made ​​of plastic and ceramic powder mixed with magnets.