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Science - 5th Grade
Standard 3 Objective 1
1 class periods of 30 minutes each
A magnet is used to make a paper clip "walk" on a paper plate. Students investigate how many paper plates through which the magnetic field will still pass.
For Each Student:
Magnetism will pass through materials that are not magnetic, such as paper plates. When students are allowed to manipulate magnets and objects, they soon discover that they can make the objects move without actually touching the objects. Moving the object around on a paper plate or the table without touching it with the magnet is often an exciting discovery.
As students test the strength of the magnet by stacking their paper plates together to see how many paper plates a paper clip is still attracted through, make sure that they understand that the paper plates are not blocking the magnetic field when the magnet will no longer hold the paper clip. The thickness of the paper plates has moved the magnet and paper clip far enough apart that the magnetic attraction is no longer strong enough to hold the paper clip, but it is still passing through the paper.
Have students plan and conduct a simple experiment to show a magnetic field passing through another type of material. (See Extension #1 for ideas and suggestions.)