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Making a Magnet Activity制作磁活动.doc


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Making a Activity
Names________________________________________________________________________
BACKGROUND: All s have two poles - north and south. You could take a and break it into pieces and all of the pieces would have north and south poles. Ever play with two s? If you hold them with one 's north pole facing the other's south pole, they will stick together. If you put two of the same poles together, the s will push apart. With s, opposite poles attract, and “like” poles repel.
Ever wonder why the Earth has a North and South Pole? The Earth's hot, churning, iron core is like a giant . The ic field of the earth surrounds us and makes it possible for us to navigate using things like PASS. passes have a inside that lines up with the Earth's ic field.
Today, you will be learning about s in a few ways. You will explore how s work, what kinds of objects respond to a , and you will make something into a !
Section 1: How do s work?
Take two s and put them about 6 inches apart (15 cm). Slowly push one closer and closer to the other one.
1. What happens when the gets closer to the other ?
Now turn the over. Push it closer and closer (slowly) to the other .
2. What happened this time?
s have two poles: A north and a south pole. The south pole always attracts to the north pole, and vice versa. The north pole repels other north poles, and south poles repel other sout

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  • 页数2
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  • 上传人duzw466
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  • 时间2018-07-08