lirik lagu science experiment – how to make a potato-powered lightbulb
materials:
a large potato
two pennies
two zinc-plated nails
three pieces of copper wire
a very small light bulb or led light
what you need to do:
cut the potato in half, then cut a small slit into each half, large enough to slide a penny inside
wrap some copper wire around each penny a few times. use a different piece of wire for each penny
stick the pennies in the slits you cut into the potato halves
wrap some of the third copper wire around one of the zinc-plated nails and stick the nail into one of the potato halves
take the wire connected to the penny in the half of potato with the nail and wrap some of it around the second nail. stick that second nail into the other potato half
when you connect the two loose ends of the copper wires to the light bulb or led it will light up [source: mathinscience]
be careful when handling the wires, because there is a small electric charge running through the wires. hydrogen gas may also be a byproduct of the chemical reactions in the potato, so don’t perform the experiment near open flames or strong sources of heat [source: madsci]
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