Materials needed: meter sticks, string/yarn, balloons(2 per group), scissorsIn this inquiry lab, students will discover that, yes, air does have mass. For this activity, you can have students set up this with partners/small groups or you can just make one set up and do this as a demo. If you do this as a demo students can still complete the lab form. This can work during stations as well. This is a very inexpensive lab, especially if you just do this as a demo in front of the class.