When you mix two things, sometimes surprises happen!
🧂 I dissolve
Salt or sugar in water: you can no longer see it, but it is still there. It is a solution, and the mixture is homogeneous.
🏖️ I do not dissolve
Sand remains visible and settles: heterogeneous mixture. Oil floats on water.
🔎 I separate
Sand and water: we filter. Salt and water: we let the water evaporate, the salt reappears.
🤯 Did you know?
Salt marshes do exactly that: the sun evaporates the seawater and the salt remains.
🧪 Challenge: how many spoons of sugar can you dissolve in a glass of water? Test with hot water then cold water! The whole shop
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