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        Hot Air Balloons and Air Pressure | 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.

        Hot Air Balloons and Air Pressure Webcast

        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.

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        The Balloon Trip

        Take a trip in a hot air balloon! Watch as this crew prepares for take-off as they prepare to launch their balloon for some first-hand examples of buoyancy, air-pressure and aeronautics.

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        Gas Balloon

        Gas-filled balloons work differently than regular balloons fueled by hot air. When a gas balloon is filled with a gas that's lighter than air, the combined weight of the balloon and the gas will weigh less than the air around it, letting the entire balloon float!

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        Baumgartner Capsule

        This stratos capsule carried Felix Baumgartner 128,000 feet into the air to set multiple world records.

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        Hot Air Balloon

        By applying heat to the air molecules inside a hot air balloon, those particles begin moving faster and taking up more space, forcing some air out of the system. This loss of mass enables the entire balloon to weigh less than the air surrounding it.

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