What is the atmospheric pressure compared to inside a straw?
Less than atmospheric pressure
The pressure inside the straw is lower than the atmospheric pressure outside.
What happens to the pressure at the liquid inside a straw?
It decreases
This decrease in pressure allows liquid to be drawn up the straw.
When drinking with a straw, the pressure inside the straw is affected by what?
Atmospheric pressure
The atmospheric pressure pushes the liquid up the straw when the pressure inside is reduced.
What is the height that can be achieved when using a straw?
Dependent on pressure difference
The height is influenced by the difference between atmospheric pressure and the pressure inside the straw.
True or false: The pressure inside a straw is greater than the atmospheric pressure when drinking.
FALSE
The pressure inside the straw must be lower than the atmospheric pressure to draw liquid up.
