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A magnet attracts objects made of iron and this phenomenon called magnetism has many uses. In this chapter, you will explore and experiment with magnetism in different ways, including bar magnet, magnetic field,…
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Book Chapter |
Magnetism is a well known physics phenomenon that is used, for example, in computers for magnetic recording, in Maglev trains, or for holding notes on a refrigerator door. Magnetism is a phenomenon in which the magnetic…
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Journal Article |
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The Magnet Contest: Which Magnet is Stronger?
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This activity is for testing the strength of different magnets. Use a pile of paper clips for children to explore with. As they begin picking up paper clips with their magnets, they will see that some magnets can pick…
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Magnetism is a force that acts over a distance. Children play with magnetic toys all of the time. Any family that has a refrigerator knows that the number of magnets on the door defines the size of the appliance. This…
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The purpose of this assessment probe is to elicit students' ideas about magnetism. The probe is specifically designed to determine whether students believe air is necessary for magnets to work.
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The magnetic force is strange and does not exist for neutral particles—only for charged particles, if those particles are moving. The direction of the force isn’t toward the magnetic field or away from the field but “…
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For those of us who grew up with conventional electromagnets, it is very strange to see an electromagnet that is not connected to an external power source. But that is what happens with a superconducting magnet. After a…
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Book Chapter |
This chapter focuses on finding the magnetic field. In the Biot-Savart law, the magnetic field is perpendicular to both the current element and the radiusvector. The magnetic field points out of the plane determined by…
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In this activity, students read an article about using magnets to influence the behavior of bees, and then consider the physics principles for this “magnet” instrument and what engineers must consider to design this…
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Book Chapter |
This lesson is designed to help students figure out what types of objects are attracted to a magnet. Students use what they know about magnetism, properties of matter, and patterns to design and carry out the…
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Book Chapter |
In this lesson, the students’ investigation proposal should include the guiding question, How does changing the distance between two magnets affect magnetic force strength? The goal is to figure out how changing the…
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This activity is for exploring magnetic and nonmagnetic objects. Give each child identical magnets and ask them to test some of the objects provided to find out which ones are attracted to magnets. This should help…
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Book Chapter |
This activity uses a magnet to push another magnet through a maze. Discuss how a magnet can pull or push another magnet and give each child a “Magnet Maze” sheet and two magnets. Briefly demonstrate using one magnet to…
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Book Chapter |
The guiding questions in this activity are,“How do magnets interact with other objects and how can magnetism make iron filings move?” In this activity, students use iron fillings to explore magnetism as a pulling force…
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