Betw. Lab and Ext..doc

Force between Magnets Lab

Name______Date______

Equipment: bar magnets (2 per group) Iron filings Colored Pencil or Crayons

Procedure:

Part 1 Examine the bar magnets that the teachers are holding. Draw a picture of them:

Hypothesis: Write a statement about what you predict will happen when they are placed near to each other. In addition to the statement, you may also draw a picture.

______

When everyone in your group has completed writing a hypothesis, getter 1 should get a pair of magnets for your group. See what happens when you move them towards each other. Write your observation. You may also draw pictures of your observations. ______The word attract means to pull to or draw toward. The word repel means to force away or apart. Use the words attract and repel to describe your observations. ______

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Part 2.

Getter 2 should return the magnets to the supply area. Getter 1 should get a compass.

Draw a picture of the compass. Line it up so the arrow is pointing to the "N". How do you think this works?

______Getter 1 should get one . Put it flat on the table near the compass. Move the "N" pole of the magnet towards the "S" on the compass. What happens? ______Now put the "N" pole of the magnet towards the "N" side of the compass. What happens? ______Why do you think this happens? What do you think it tells you about the compass? ______

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Part 3

Magnetic fields show you how a magnet would change another magnet around it. Getter 1 should get sealed iron filings.

Place your sealed iron filings near your bar magnet. Notice how the iron filings create a new shape. This is because each little piece of iron has become magnetized and has become its own mini magnet. These mini magnets (iron filing) create lines go from the North end of the magnet to the South end. These lines are called lines.

Now use your compass to show how the bar magnet changes it.

In the circles, draw an arrow to show the direction that a compass points. Label the tip of the arrows as N for North and the other end as S for South. N

S

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