how is mixture of sugar and sand separate?
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By releasing ants in the mixture of sand and sugar, sugar will get separated...
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but why
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The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.
Because you have not altered the sand or the sugar in a chemical way (the sugar always remains as sugar, and is reclaimed in the same form), these were physical changes.
Because you have not altered the sand or the sugar in a chemical way (the sugar always remains as sugar, and is reclaimed in the same form), these were physical changes.
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