B1 Intermediate US 10 Folder Collection
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Topic: Air Pressure.
How do straws work?
They work very hard.
No.
Straws work because of air pressure.
Is it similar to acupressure?
No.
Air pressure is the weight of air pressing
down on earth and all other objects present on it.

Now, when a straw is in a liquid, the air
pressure upon the liquid in the glass.

The air pressure upon the liquid in the straw is similar.
Causing the levels of liquid to be almost equal.
However, when we drink the liquid through
straw.

We first inhale causing the air from the straw to flow into our lungs.
Now due to absence of air, the air pressure
in the straw decreases.

Hence, the air pressure present on the liquid of the glass pushes the liquid into the straw
Causing it to move upwards and thus, helping us drink.
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How do straws work? | #aumsum

10 Folder Collection
AumSum published on April 15, 2019
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