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1 CXEGA09ALR1X_AL14.indd 2 3/2/07 6:16:01 PM

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4 A Young Scientist Today in school we learned about a great scientist named Albert Einstein. When Albert was five years old, he was home sick in bed. His dad brought him a compass to play with. Albert did not know what it was, but he loved it. A needle spun inside a little glass case. Then the needle stopped. It always pointed in the same direction. *missing image [art spec: realistic drawing of Albert Einstein from TeleScope ID# ] [caption/label] Albert Einstein 2 compass Albert Einstein

5 Albert could not put the compass down. He asked his dad about it. What is it? How does it work? Why does it work? Albert s dad tried to answer Albert's questions. The compass works because the needle is a tiny magnet. The magnet moves because Earth is like a giant magnet! Earth has a north pole and a south pole, just like magnets. Earth s north pole attracts the north pole of the magnet. This drawing shows the poles of Earth. N S This drawing shows the poles of a magnet. Just like Earth, magnets have poles. 3

6 The Magnet Hunt I ran home and asked my dad to see the camping things. The needle in our compass turned too. Then the needle stopped. It pointed north! I loved the compass, just like Albert did. You can use a compass to keep from getting lost. A compass tells you which way is north. A compass can help you find your way. compass 4

7 can opener cabinet refrigerator Dad said other things used magnetic forces too. We went on a magnet hunt in our house. I found that magnets keep our cabinets and refrigerator doors closed. We also have magnets outside the refrigerator. They hold up notes and artwork. The magnet sticks right through the paper. I even found a magnet in the electric can opener! 5

8 Magnets at Work Magnets attract things that have some metals in them. Paper clips and pins are attracted to magnets. Screws and bolts are attracted also. Some buttons are attracted to magnets. Two magnets can repel. That means they push away from each other. These things are attracted to a magnet. 6

9 I asked Dad what blocks a magnet s force. Dad says that not much can stop a magnet. They pull through the air. They pull through water. They pull through wood. They can even pull through my hand! Magnets pull through water. Magnets pull through air. 7

10 Magnetic Forces I like magnets too, just like Albert Einstein. Does that mean I will become a great scientist some day? Dad says I still have to learn a lot. Learning about magnetic forces sounds like fun to me! 8

11 Think and Write 1. Why does a compass needle point north? 2. Where can magnets be found in a kitchen? 3. Expository Writing Write a paragraph. Explain why young Albert Einstein was so amazed by a compass. Hands-On Activity Use a compass to fi nd out what objects a magnet attracts and does not attract. Make a chart and write the names of the objects on the chart. School-Home Connection Go on a magnet hunt in your own home. Talk about how magnetic forces help you at home. iii