"Be a Compass" Magnet PPT

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"Be a Compass" Magnet PPT

Part 1: Making magnetic needles

People have long discovered that iron nails and steel needles sometimes become magnetic after being contacted or rubbed by magnets. They also found that steel needles have stronger magnetism than iron nails and iron sheets when they are also rubbed with magnets. People gradually mastered the method of making small magnets by friction.

Now people can use special machines and advanced methods to make various magnets with strong magnetic force.

We make a magnetic needle by rubbing a magnet against a steel needle.

Rub the poles of the magnet on the steel needle in one direction and repeat 20 to 30 times.

Make a compass PPT, part 2: Install the magnetic needle

How to make the magnetic needle rotate freely in the horizontal direction? How to express the north and south poles of a magnetic needle?

After installing the magnetic needle, it must be inspected and adjusted.

Make a compass PPT, part three: display and communicate our compass

Demonstrate how a compass points north and explain why it is designed this way.

If you were to make another compass, where would you improve it?

Nowadays, we often use compasses when traveling in the wild. With the development of science and technology, the tools and instruments that can help us identify directions have become more and more sophisticated and accurate.

Keywords: Free download of Chinese PPT courseware for the second volume of the third grade of the textbook version, Make a Compass PPT download, Magnet PPT download, .PPT format;

For more information about the "Magnet Makes a Compass" PPT courseware, please click the Magnet ppt makes a compass ppt tag.

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Update Time: 2024-11-22

This template belongs to science courseware Third Grade Science Volume 2, Textbook Edition industry PPT template

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