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    In this activity, students pop a balloon in a container of sand to model caldera volcanoes and learn how lakes like Taupō and Rotorua were formed.

    By the end of this activity, students should be able to:

    • demonstrate how caldera volcanoes are formed
    • demonstrate how depressions are left after the volcano erupts
    • identify Lakes Taupō and Rotorua and discuss their formation.

    Download the Word file for:

    • introduction/background notes
    • what you need
    • what to do
    • extension idea.

    Related content

    Watch this animated video to see how Lake Rotorua could have formed from a caldera eruption.

    Extension idea

    If students enjoyed making models of caldera volcanoes, try the Making a model of a cinder cone activity.

      Published 18 August 2014, Updated 22 April 2020 Referencing Hub articles