The presentation by David Webb was really entertaining and informing. David and Joan Webb are both really charming people. The way he presented was really interesting. He focused mainly on vacuums. There was the bar that had one atmosphere in it. I never knew atmosphere was a unit of measure; I thought it was just the air around us. I helped out with the balloon experiment. In the vacuum machine, a little tiny balloon became a bigger balloon. It was really unbelievable. I was really jealous of the person who got to eat the marshmallow. When I saw them I got really excited and they were PINK. That's my favorite color, so I was even more excited! They were the same ones I made smores with at my friend's house! That was a pretty good way to spend my chemistry block day.
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