Air Pressure

Definition: Air Pressure is the force exerted by air, compressed, on any surface that has contact with it. Air pressure changes with altitude. When you move to a higher place air pressure decreases because there are fewer air molecules as you move higher in the sky.


Experiment: So when I squeeze the bottle the cap will go fling off and down the stairwell because the air pressure that is building up inside the bottle when the bottle is squeezed it is so compressed that all the air molecules push the cap off of the bottle.

- Kelly