PROBLEM: What type of items do magnets pick up?

PREDICTION:

EXPERIMENT 1: MAGNETS

1. Can you always stick a magnet to another magnet?
   Locate the north and south poles of all your magnets. Clue: north on the bar magnet is where the notch is. State where north and south are on the other magnets.
     
2. Put the North poles of two magnets together. What happens?
     
3. Put the South poles of two magnets together. What happens?
     
4. Do like poles repel or attract?
     
5. What pole will the North pole attract?

EXPERIMENT 2: MAGNETIC FIELD

PROCEDURE: Put the bar magnet under a piece of paper. Sprinkle the filings on top of the paper. Move the magnet slowly. Draw the magnetic field configuration that appears.

EXPERIMENT 3 WHAT IS MAGNETIC? (use bar, logo or ring)

PROCEDURE: Test to see which items are magnetic and which are not. List them accordingly:

What kinds of materials are magnetic?

EXPERIMENT 4: MAGNETIC FORCE (1 logo, bar, ring magnets)

1. Are all magnets of equal strength?
     
2. Can you make a stronger magnet by sticking several magnets together?
     
3. Will a magnet attract things through a sheet of paper?
   Several sheets?

Find out whether these items will "block" the magnetic force. Answer yes or no, and comment on your findings.

CONCLUSION: Why do you think magnets pick up only certain substances?