Is air matter? Why or why not? (science)

matter is anything that has mass and takes up space. so, in order to prove that air 

matter, we need to prove that air has mass and takes up space.

we can get a balloon while go ahead and inflate the balloons with air

.balloon  lost its air in a very calm, controlled fashion without sending its balloon guts all over the room. The end of the meter stick with the deflated balloon should have risen into the air. It did this because there was less mass in the balloon after it deflated. The only way the balloon could have lost mass is if the air that was inside it has mass.