Storing Energy in Water

Project Number: 79

Description: Place 1/2 teaspoon of salt into a small amount of water in a cup and then stir it until it dissolves. You can also use a compartment in the liquid power source for this, but don't use a metal container. If available, use a thermometer from your home to measure the water temperature. If no thermometer is available, then test the water with your finger. Connect the red & black jumper wires to the hand crank (HC) and connect the loose ends to the electrodes. Turn the crank to heat the water. You should see the temperature rise on the thermometer or you should feel the difference with your finger. You may have to turn the crank for a minute or two before the water gets warmer.

Snappy: Solar or wind power may be used to heat water during the day. Then the people use the hot water to keep homes warm at night.