Way Cool! - Day 4

Today's activities:

Individual or Group Activity: Hot Stuff! Making a voltaic cell

Materials

You will need:
	Pennies
	Aluminium foil
	Paper towel
	Scissors
	250 ml (1 cup) water with 10 teaspoons of salt added
	Two pieces of insulated copper wire
	Tape

Procedure

Use a penny to draw circles on a sheet of aluminium foil and a piece of paper towel. Cut out all the circles and moisten the paper towel circles with salt water. Pile up the circles in the following order: copper wire, paper towel, and aluminium foil. Each group of three circles constitutes a cell. Strip down both ends of the pieces of wire. Tape one end of each wire to each end of a cell. Place the two free ends in contact, preferably in a dark room and watch the sparks fly.