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It's invisible, but it's everywhere. It's air, and you can make it do some amazing things! Try these experiments and find out more.
Does a solid object always block moving air? This experiment will show you that it doesn't.
YOU WILL NEED
- Slip of paper 1 inch (2.5 centimeters) wide and 3 inches (7.6 centimeters) long
- Tape
- One-liter bottle
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HERE'S HOW
Cut a slip of paper about 1 inch wide (2.5 centimeters) and 3 inches (7.6 centimeters) long. Tape one end of the paper to a flat surface. Place a clear, empty one-liter bottle about four inches (10 centimeters) in front of the paper. Then blow on the bottle, toward the paper. The paper flutters!
WHY?
Moving air separates and travels around a curved surface. The air comes back together on the other side of the bottle and causes the paper to flutter.
PRESSURE IS ON »
Illustration by David Bamundo
Text by Julie Vosburgh Agnone
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