Air

Air is all around us. Our planet is surrounded by a layer of air called the atmosphere. Air has substance, though it can't be seen.

We Know that air can hold up kites, ballons, and airplanes. But although we feel air and can measure certain things about it, can we prove that air exists? After all, scientists shouldn't make assumptions, even about the most obvious things.

So before learning about flight, lets try a small experiment to see if air really exists...