Name:_____________________! ! Date:______________________ Magnetism

```Name:_____________________!
Date:______________________
!
Magnetism
Pretest/Post-Test
1. Sarah was playing with magnets. She had one magnet on the table, and one in her
hand. As she moved the magnet in her hand closer to the one on the table, the
magnets suddenly snapped together. Explain why the magnets snapped together.
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2. Carl placed a paper clip, piece of cardboard, and magnet together like you see in
the picture below. Why did the paper clip stay against the cardboard rather than
to fall on the floor?
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3. Kimberly placed two horseshoe magnets near each other on a table. What will
happen when she lets go of the two magnets?
a.
b.
c.
d.
One side of the magnet will repel and the other side will attract.
The two magnets will repel and push apart
The two magnets will attract and stick together.
The force will be cancelled between the magnets.
4. John placed black sand and iron filings into a box and mixed them together. When
mixed together, they look like a black powder. Which of the following would be
the easiest way to separate the sand and the filings?
a.
b.
c.
d.
Use
Use
Use
a magnifying glass.
water to the mixture.
a magnet.
a hot plate to heat the mixture.
5. Choose the letter below that contains only items that include iron.
a.
b.
c.
d.
plastic straw, iron nail, paperclip
wooden craft stick, plastic straw, rubber band
iron nail, paperclip, sewing needle
rubber band, iron nail, plastic straw
6. Magnets have a force field.
a. True
b. False
7. What is special about the end of a magnet?
a.
b.
c.
d.
They are the same.
They are the places where the magnetic force is the strongest.
They are the places where the magnetic force is the weakest.
There is no difference between the end of a magnet and the rest of the magnet.
8. What happens to opposite poles in a magnet?
a.
b.
c.
d.
They
They
They
They
repel.
sometimes attract and sometimes repel.
attract.
have no effect on each other.
9. What causes a compass needle to point in a certain direction?
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10. Where do you think magnets come from?
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11. If you conduct an experiment and find out that your hypothesis does not match
the results, what should you do?