1. Some of the things that I learned about air are that air actually has weight. Another thing that I learned was that air also takes up space
2. Some evidence that I have that air actually takes up space is if you pump air into a yoga ball you can sit on it and the ball get bigger because there is air in it.
3. Some evidence that I have that proves air has weight is I did an experiment to see if a balloon weighed more with air or if it didn't have air and the one that had air in it weighed more.
4. No, because the trickery was to start it where the balloon that was not inflated started not inflated and he would tilt the stick to make it so the balloon that was not inflated looked like it weighed more but we started out with both of the balloons inflated.