TOPS #20 Magnetism

28 Task Card Activities



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.