Why Does A Helium Balloon Float Up? - For How Things Fly

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Why does a helium balloon float up?

A:

Helium is called a "lighter than air" gas, because it is less dense than air. Helium balloons rise because of a force called buoyancy.

Ask an Explainer Posted on June 8, 2015 at 5:15 am Categories: Gravity & Air Check out other Questions and Answers

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