Irreversible changes and the ‘fire extinguisher’

Photo of seven lit tea lights in a glass bowl

Source: © Royal Society of Chemistry

Try this investigation to explore what materials need to burn, with detailed teacher notes, classroom slides and a video demonstration.

This experiment focuses on using producing carbon dioxide to extinguish a candle. First watch the video showing the ‘fire extinguisher’ demonstration, then find out how to run the investigation with your learners.

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