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        Hot Air Balloons and Air Pressure Webcast | Stem in 30

        Has anyone ever told you that you're full of hot air? How is hot air different from cooler air? This fast-paced webcast will look at how hot air balloons float and how a change in air pressure affects them. Visit the full archived lesson with pictures and audience comments here.

        Originally presented on March 18, 2015 | Explore the Support Materials below for the archived live-stream content with questions, comments, and images shared during the live event.

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