Activity to illustrate atmospheric pressure
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Hold one balloon by the string in every hand and role the two balloons so that they are at your nostril level and 6 inches apart. Blow challenging into the area between the balloons. This lowers theair pressure. The pressureof the surrounding air is now higher and it will push the balloons together.
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Fountain Bottle.
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.
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.
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