Mary Anne Govan used a plaster of Paris model, vinegar, baking soda and dye to produce a working model of an erupting volcano in the Raetihi School science fair last week. The concoction using the last three ingredients produced the 'lava' that welled up from the volcano and spilled down the sides.
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Ruapehu Bulletin, Volume 9, Issue 410, 29 October 1991, Page 3
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52Mary Anne Govan used a plaster of Paris model, vinegar, baking soda and dye to produce a working model of an erupting volcano in the Raetihi School science fair last week. The concoction using the last three ingredients produced the 'lava' that welled up from the volcano and spilled down the sides. Ruapehu Bulletin, Volume 9, Issue 410, 29 October 1991, Page 3
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