Science At Home - Build A Working Lung

HEY SCIENCE FANS!

You may know WHY we breathe, but do you know the science behind how we breathe? It’s fascinating! Learn how, and then build a working model lung with nothing more than two balloons and an empty plastic bottle (and maybe some scissors)? Yes! You can - and Ryan shows you how!

Boyle’s Law

Boyle’s Law (which may also be referred to as Mariotte’s law or the Boyle-Mariotte law) can be stated this way:

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional.

The math can be expressed as follows:

PV = k

where :

P = pressure

V = volume

k = a constant


What does that mean?

Simply put, the product (multiplication) of pressure and volume is a constant. If the volume increase, the pressure must decrease. If the volume decreases, the pressure must increase - assuming that temperature is held constant.


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