Wind bags are long blue bags, that we used to experiment with. We blew into it with five big breaths trying to fill it up. We used two techniques to blow the wind bag up. The first is blowing into it from close up inside the wind bag and the second one was blowing into it from a distance ( 30 cm etc). We experienced that when we blow up the wind bag closer up doesn’t get as much air than you would 30 cm back, because when you are about 30 cm back 10 x of the of air is coming in than your one breath. That is because when you blow air in that air is under pressure. Then other air comes from behind and also goes into the bag.
By Callum and Becky.
By Callum and Becky.
What a great experiment. I would not have known that the bag would fill up faster when blowing air into from a distance. Have you done any other experiments that test the same thing?
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