How to Make a Compass: Two Designs

How To Do A Magic Trick With A Pen - How to Make a Compass: Two Designs

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This is a fun way to illustrate the natural world using household objects. ensue these directions to make a floating compass and a hanging compass for determining wind direction.

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How To Do A Magic Trick With A Pen

Floating Compass

Materials:

1 clear plastic cup1 magnetneedle or small nailpincork or piece of foam about 1/4-inch thick an the size of a quarterpencil or penpenwaternotebook (optional) webcam or camcorder
Procedure:

1. Rub one end of the magnet along the needle

2. Make sure you rub in the same direction, about 30 times

3. Test the needle's magnetization by picking up the pin

4. Push the needle straight through the cork or foam piece

5. Fill the cup with water

6. Place the cork and needle so it is in the town of the cup

7. Wait for the needle to come to a rest

8. The thick end of the needle will point to North

Hanging Compass

Materials:

1 clear plastic cup1 magnetthread - about six inches longneedle or small nailpinpencil or pennotebook (optional) webcam, camcorder
Procedure:

1. Rub one end of the magnet along the needle

2. Make sure you rub in the same direction, about 30 times

3. Test the needle's magnetization by picking up the pin

4. Tie one end of the thread nearby the middle of your pen or pencil

5. Tie the other end of the thread nearby the needle

6. Place the pencil over the rim of the cup

7. Make sure that the needle is not touching the lowest of the cup

8. Wait for the needle to come to a rest

5. The thick end of the needle will point north

If you have a commercially made compass, correlate the results of your home made compass. Do the readings vary? Does one type of home made compass work good than the other? What happens when you move your compass to an additional one location? How long will the needle hold magnetization? How do you know when you need to remagnetize the needle?

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