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1. I learned... 1) That air has weight, 2) You can use an experiment to help prove that air has weight and 3) I only have to use a few materials to prove my theory.
2. You can prove that because if you keep putting air in a plastic bag, eventually you will have to stop because it will fill up too much and it will eventually pop if you put it past its limits. Another way to prove it takes up space is if you have a cup and you put paper in the bottom of it and then you put the cup in water with the opening going down into the water, then no water will get into the cup. The last and final way to prove that air takes up space is if you blow up a balloon with air, then it gets bigger.
3. We had a balloon that wasn't filled with air, and a balloon that was filled with air. The one that was heavier was the one that was
4. Yes, because we used a yard stick and we measured exactly where the middle was.