What started out as a simple experiment about vacuums, turned into one of the most useful tools for predicting weather. Learn about the circumstances surrounding the invention of the barometer and the scientific principals...

It's amazing how easy it is to forget that every second of our lives we are being pushed on by an uncountable number air molecules. Explore with your class the concept of air pressure and how it affects our bodies, the earth's...

Here is an unforgettable demonstration of the power of air! Because the column of air is about 250 miles or 400 km tall, its weight on a sheet of newspaper is enough to hold a stick in place as you smack the other end to break it....

A video lecture explaining that vapor pressure is the pressure exerted by a vapor in equilibrium. Also explained is how kinetic energy relates to temperature and vapor pressure. The video also explores how evaporation plays a role in...