Witches Cauldron with Dry Ice Fog
Materials: ★★★ Requires materials not commonly found in school laboratories
Difficulty: ★★☆ Can be done by science teachers
Safety: ★★☆ Some safety precautions required to perform safely
Categories: Dry Ice, Special Occasions
Alternative titles: Halloween Dry Ice Fog
Summary
This Halloween demonstration uses dry ice and hot water in a cauldron-like container to produce a bubbling fog effect. The sublimation of dry ice creates dense white clouds that spill over the container’s edges, resembling a witch’s cauldron.
Procedure
- Choose a cauldron-style container that can safely hold hot water.
- Fill the container about two-thirds full with hot water.
- Gradually add small pieces or pellets of dry ice to the water.
- Watch as dense fog flows over the sides of the cauldron.
- Replace with hot water when it cools, or use a heated soup kettle to maintain temperature.
Links
Spooky Dry Ice Cauldron - Imagination Station Toledo:
The Dry Ice Fog Cauldron by Chillistick | Halloween Ideas and Halloween Decorations 2018 - Chillistick:
📄 Create a Witches’ Cauldron using Halloween dry ice fog - Polar Ice ltd: https://polarice.co.uk/dry-ice-information/applications-of-dry-ice/halloween-dry-ice-fog-special-effects/
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