Bring out the point that solar energy is inexhaustible because it comes from the sun. The other fuels we use come from sources such as fossils and trees that can be used up. Think about what solar panels look like. They are typically painted black underneath a clear glass or plastic cover. Today's experiment will help us figure out why by illustrating the relationship between different colors and the ability to absorb and store solar energy.
Activity Have students get into pairs or small groups.
Put newspaper on tabletop and underneath on the floor to catch any paint spills. Give each pair or group 4 tin cans. Let the cans thoroughly dry. Fill each can with the same amount of water. Cover each can with a piece of plastic wrap.