(#20) Magnetism
Magnets are fascinating. They provoke our curiosity. By touching one to a straight pin, you create an instant compass. Use it to map magnetic fields around a small magnet, or a whole planet. What else can you do with this pin? Remagnetize it, chop it into pieces, heat the attracting fragments in a candle flame. These experiments reveal much about the nature of magnetic domains. Add coiled wire and dry cells to your inexpensive "refrigerator" magnets to create a surprising array of wonderful inventions: electromagnets, solenoids, telegraphs, buzzers, motors, generators and relay switches. Magnetism 20 is great science, and great fun.
(#20) MAGNETISM is part of our Self-Directing Task Card Series. It is an 72 page soft-bound book organized into three main parts:
INTRODUCTION
* A TOPS Model for Effective Science Teaching * Getting Ready * Gathering
Materials * Sequencing Task Cards * Long Range Objectives * Review / Test
Questions
TEACHING NOTES ( 28 lessons)
* The Basics * Force Field * Build a Compass * Angle of Declination * Pin
Chains * Magnetic Domains * Rearranging Domains * Lines of Force (1) *
Lines of Force (2) * Lines of Force (3) * A 3-Dimensional View *
Interacting Fields * Terra Bagga (1) * Terra Bagga (2) * Coil It (1) *
Coil It (2) * Rocking Galvanometer * Electromagnet * Solenoid * Telegraph
It * Buzz It * On-Off Motor * Reverse Poles Motor (1) * Reverse Poles
Motor (2) * Relay Switch * Motors and Generators * Inverse Square Law (1)
* Inverse Square Law (2)
REPRODUCIBLE LINE MASTERS
* 28 Open-Ended Task Cards * Graph Paper * Polar Map * Compass Base *
Protractor
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(#20) MAGNETISM requires few specialty items other than bare and insulated copper wire and ceramic magnets. You'll need at least 2 magnet per lab group which can be purchase direct from TOPS (see below). The last activity requires a gram balance (or TOPS balance from #05 Weighing) . Gather these and other simple materials, photocopy the 28 task cards, and you're ready to explore TOPS Learning Systems hands-on.
GRADE RANGE: 8-12
ORIGINS: written by Ron Marson / illustrated by Peg Marson / copyrighted
in 1991
by TOPS Learning Systems / ISBN 0-941008-90-8
ORDERING: Please print a copy of our order form, which lists all our titles. Use this form (or scratch paper) to track your ordering preferences as you browse our website.
#20 Magnetism @ $13.00
#105 ceramic magnets @
$0.40 each
