• Question: Why are bubbles round?

    Asked by JTM2003 to Paul, MarthaNari, Jonny, Hannah, Alison on 20 Jun 2015.
    • Photo: Paul Brack

      Paul Brack answered on 20 Jun 2015:

      Bubbles have a property called surface tension. This pulls the molecules in the bubble into the structure that has the smallest possible surface area. The shape with the smallest possible surface area is always a sphere, and thus bubbles of anything are always round.

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