How to Measure Volume of air Inhaled?

How can we measure how much volume of air we inhale per stroke?
- Fransis (age 15)
Yangon, Myanmar

Get a flexible plastic tube.  Fill up a small glass or cylinder with  water and carefully turn it upside down in a larger bowl of water.  Take a normal breath of air and blow it through the tube into the cylinder.  The volume of air in the cylinder is what you want.

LeeH

(published on 06/10/2011)