Kids Science Activities
Air pressure and Straw
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| Materials Required |
- A transparent straw
- A glass of water
- A blade
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How to do it
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- Take the straw and make a small cut in the middle of the straw.
- Bend the straw to 90 degree.
- Now, place one end of the straw in the glass of water and the other end in mouth of your kid.
- Ask the kid to blow the air through the straw and ask her to observe what happens.
- Few water will rise up in the vertical straw.
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Explanation
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- Moving air exerts less sideways pressure than still or less turbulent air around it.
- The moving air at the upper end of the straw(which is kept in the mouth) reduced the pressure in the vertical straw.
- As the atmospheric pressure on the surface of water was greater than the pressure in the straw, few amount of water was forced to rise up into the straw.
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