
Upside Down Water Cup
Clip: 6/30/2023 | 51sVideo has Closed Captions
Can air keep water from falling out of an upside-down container? Mister C shows us how!
Can air keep water from falling out of an upside-down container? Mister C shows us how gravity helps make an air-tight seal!
Problems with Closed Captions? Closed Captioning Feedback
Problems with Closed Captions? Closed Captioning Feedback
Camp TV is a local public television program presented by THIRTEEN PBS

Upside Down Water Cup
Clip: 6/30/2023 | 51sVideo has Closed Captions
Can air keep water from falling out of an upside-down container? Mister C shows us how gravity helps make an air-tight seal!
Problems with Closed Captions? Closed Captioning Feedback
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Learn Moreabout PBS online sponsorship-Air is stacked all around us and creates 14.7 pounds of pressure per square inch.
But can air really keep water from falling out of this container?
Fill up a glass or a container with some water.
Find a piece of paper, index card or a playing card that completely covers the opening of your container.
Make sure you have something to catch the water just in case it spills.
The card is in place, and now hold it as you turn over the container.
Be brave.
Let go!
And the water stays inside the container.
Gravity is pulling down on the water and creates an airtight seal which doesn't allow air to enter the container.
The pressure outside of the cup is greater than the pressure on the inside of the cup, and this holds the card in place and prevents the water from spilling out.
Give it a try and remember, until next time, keep learning.
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Camp TV is a local public television program presented by THIRTEEN PBS