Flying in the SkyScience brain teasers require understanding of the physical or biological world and the laws that govern it.
One day, a boy noticed a man selling balloons that he was blowing up by himself. Being a young child, he was excited and ran to get one. When he bought it, however, it wouldn't float up in the air. Why is that?
HintThink about the properties of air.
AnswerIt wouldn't fly simply because it was mouth blown. When it floats up, it's because of the type of gas inside it, which is helium. Helium is less dense than air, so it floats. Carbon dioxide, on the other hand, is not.
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