So after students completed a series of four experiments mixing different substances together, students noticed some patterns. Almost all of the time, the mass of the two substances we mixed was approximately the same as the mass of them mixed together.
In our vinegar and baking soda experiment, students noticed that it bubbled when the two substances were combined.
So we're engineering a possible solution to "trap" the gas to see if air not only has mass, but also to provide further evidence that the mass of a mixture should be the same as the mass of the substances that make it! Check out a small sampling of student's brainstorms to this problem. Next week, they'll be creating group plans and testing out their "gas-trapping technologies!"