On January the 22nd 2009, we had a Scientists in School visit. Ms. Wang introduces us to the properties of air and principles of flight. We had 1 experiment about high and low pressure. Our materials used included ping pong balls, cone shaped paper cups and scissors. We first cut a small hole on the bottom of the cup, and then we placed the ping pong ball in the cup. Our goal was to blow the ping pong ball out of the cup from the bottom where we cut the hole. We all failed because it was fast moving air blowing up into the cone and there was low pressure on the bottom and high air pressure moving across the top of the cone. When we blew across the top of the cone or on top of the ball in the cone, the ball came out because there was low air pressure on the top and high air pressure pushing the ball on the bottom. This experiment was really cool. 
Why is it important to learn about high and low air pressure when related to flight?
ERIC, Dan Yang, Gloria, Salena, Victoria, Eric, JESSICA
Experiment #3 was cool and fun! I thought that it was really surprising that you had to blow over or across the top of the cone to get the ping-pong ball out! I would have guessed that you would blow from under the cone for that to happen. What was your hypothesis, and did the answer surprise you? Sophie
ReplyDeleteI never would have thought that you would have to blow over the top instead of underneath the cone for the ball to lift. Usually when you blow from below something it goes up, that's why the results of this experiment surprised me. Keiko
ReplyDeleteThis experiment was really fun because, I was so stumped at first when, the ball didn't go out of the cup, because like Keiko said, usuallly when you bloiw somthing from the bottom it rises. When Ms.Wang explained about the high pressure,and low pressure I got it, and it was cool to see the ball fly out when you blew on it from the to. Maya
ReplyDeleteI agree because it was fun but challenging which i like and it was also fun to learn about high and low air pressure. I never knew that you had to blow across the top in order to make the ball get blown/hover out or in the cup the funny part was i was light headed after that.
ReplyDeleteJAHKOBI
I was surprise that you can’t blow the boll out of the cup when you put the cone on your lip and blow it. I think it is really cool and magical that when you blow over the top of the cup the ball will fall out. Stephanie
ReplyDeleteExperiment three was so much fun! Who knew that if you blew from the bottom of the cone that it wouldn't go out the top. Actually, I know someone who claims they got it out but they probably cheated. I had a hard time and got it out but the cone was tilted over too much and the ball went flying out. Salim
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