P057 - Vinegar and bicarbonate fire extinguisher demonstration
A teacher demonstration about density, floating and sinking that uses carbon dixoide gas and air, rather than solids and liquids.
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P066 - Making bath bombs
An activity where children observe a non-reversible reactions leading to a change of a material.
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P058 - Density cocktail
A practical activity that uses liquids with different densities to demonstrate floating and sinking.
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