You have been investigating electrical energy and where it comes from. Doing the activity below will help you to understand how batteries work.
- citrus fruit (lemons or limes work best)
- one zinc screw about 3 inches long
- one copper screw about 3 inches long
- one holiday bulb with 2-inch leads
Roll the fruit under the palm of your hand to soften it. Be careful not to break the skin. Next, insert the two screws into the fruit about two inches apart. Make sure that the screws do not go through the bottom of the fruit. Now connect one wire from the lightbulb to one screw and the other wire to the other screw. What happens?
What is a battery? What do citrus fruits contain more of than most other fruits? What caused the fruit to light the bulb?