|Friday, Dec 7, 2012 - 1:00 AM "The Lure of Magnetism" What is
the difference between a permanent magnet and an electromagnet?
In this workshop, fourth-grade students build an electromagnet
by winding a wire around a rivet and attaching the ends to
battery terminals. The students first predict how many washers
they can pick up with the help of their electromagnet and then
perform the experiment to test their predictions. After the
number of washers is recorded and the results are discussed, the
students engage in a group discussion about practical uses for
electromagnets. G