materials required to show that air exerts pressure
Answers
5 Ways to Demonstrate Air Pressure to Children
Water Glass Trick. Fill a cup one-third with water. ...
Fountain Bottle. Fill a 2-liter soda bottle half full of water. ...
Ping-Pong Funnel. Put a ping-pong ball inside the wide part of a funnel and blow hard into the narrow end. ...
The Million Dollar Bet. ...
Kissing Balloons.
Water Glass Trick. Fill a cup one-third with water. Cover the entire mouth with an index card. Holding the card in place, take the cup to the sink and turn it upside down. Remove your hand from underneath. Voilà! Because the water inside the cup is lighter than the air outside, the card is held in place by about 15 pounds of force from the air pushing up, while the force of the water pushing down is only about one pound of force.
Fountain Bottle. Fill a 2-liter soda bottle half full of water. Take a long straw and insert it in the mouth. Wrap a lump of clay around the straw to form a seal. Blow hard into the straw—then stand back. Your blowing increases the air pressure inside the sealed bottle. This higher pressure pushes on the water and forces it up and out the straw.