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Chemistry & materials

Mixing, states, crystals, fire — why stuff changes.

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Chemistry & materials Storybook Why Does Ice Float? waterdensity Open the story Chemistry & materials Storybook Where does dissolved sugar go? dissolvingmass Open the story Chemistry & materials Experiment Why does sugar dissolve faster in warm water? dissolvingheat Try it out Chemistry & materials Storybook Can water get too full? dissolvingsaturation Open the story Chemistry & materials Experiment Why does metal feel cold? heatmaterials Try it out Chemistry & materials Experiment Why does sugar disappear but sand doesn't? dissolvingwater Try it out Chemistry & materials Experiment Why Does Iron Rust? rustmetals Try it out Chemistry & materials Experiment Why do acids fizz on baking soda? acidsbases Try it out Chemistry & materials Storybook How does soap grab grease? soapwater Open the story Chemistry & materials Storybook What does fire need to live? fireoxygen Open the story Chemistry & materials Storybook Why do crystals have flat sides? crystalsshapes Open the story Chemistry & materials Storybook Why won't oil and water mix? mixingoil Open the story Chemistry & materials Experiment Why does glue dry hard? gluedrying Try it out Chemistry & materials Storybook How can one purple juice turn pink and green? acidsbases Open the story Chemistry & materials Experiment Why does a cut apple turn brown — and can you stop it? oxygenreactions Try it out Chemistry & materials Experiment Why is some ice cloudy? freezingcrystals Try it out Chemistry & materials Experiment Why does salt melt ice? dissolvingfreezing Try it out Chemistry & materials Experiment Why does alcohol feel cold? evaporationheat Try it out Chemistry & materials Storybook Can stacked liquids catch an object that sinks in water? densityliquids Open the story Chemistry & materials Storybook Which fizz lever wins this race? chemistryreactions Open the story Chemistry & materials Storybook Will this energy ledger warm or cool? chemistryreactions Open the story Chemistry & materials Storybook Which way will the pepper raft go? surface tensionwater Open the story Chemistry & materials Storybook Why can cornstarch goo feel solid and liquid? materialsnon-newtonian Open the story Chemistry & materials Storybook What happens to a birthday candle's smoke right after you blow it out? firecandles Open the story