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We use them to cook with, but have you ever consider using them for a hands-on science lesson? Jason Lindsey with Hooked on Science tells us how to use a few ingredients from around the house to create a potato gun. Be sure and use adult supervision.
36-inch wooden dowel rod
24-inch copper tube
STEP 1: Push one end of the copper tube into the potato. Pull the tube out of the potato
STEP 2: Push the other end of the copper tube into the potato. Pull the tube out of the potato.
STEP 3: Use the wooden dowel rod to push one of the potato plugs about 6 inches into the copper tube.
STEP 4: Leaving the dowel rod in the copper tube, point the other end into the sky, and quickly push the dowel rod further into the copper tube.
As you pushed the dowel rod further into the copper tube the volume of trapped air decreases, while the pressure increases. This propels the potato plugs out of the tube into the air. You can discover more hands-on experiments by going to hookedonscience.org.