KEEPING PAPER DRY UNDER WATER

WHAT DO YOU THINK?

If you turn a cup upside down and push it under water, will it fill up with water? Why?

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YOU NEED:

• 1 large bowl
• 1 paper towel
• 1 cup
• water

DO THIS:

1. Fill the bowl half way with water.

2. Crumple a paper towel and put it in the bottom of the cup.

3. Turn the cup upside down and push it under the water. Without tipping it, pull it back out. Is the paper towel wet? _______ Why?

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4. What do you think would happen if you tipped the cup while it was under water?

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Try it and record your observations.

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CONCLUSION:

What did this experiment show about air pressure?

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