Materials Required:
l Wool sock
l Plastic comb
l Tape
l Lightweight thread, about 1 foot long
Procedure:
- Rub a wool sock rapidly back and forth over a plastic comb.
- Tape the end of the piece of thread to the top of a table.
- Touch the comb to the free end of the thread and raise the comb. The thread will stand on end, sticking straight up into the air.
This Is What Happens:
When you rub the wool sock over the comb, you give the comb an electrical charge. The charge on the comb attracts the thread because the thread carries an opposite charge. The two differently charged objects cling together, and the thread is carried upward with the comb.
