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    • Balloon in hot and cold water experiment
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 2 November 2021 Size: 420 KB Referencing Hub media

    Air expands when heated and increases the pressure in a closed space, causing the balloon to inflate. When the heat is removed, air molecules contract and take up less space, causing the balloon to collapse.

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      ACTIVITY

      Balloons and air density

      Air has many interesting characteristics. It flows and spreads into spaces that are not already occupied. Air can be compressed, and it can also expand. This activity enables students to observe ...

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