4. Write an experiment to separate sugar from sand.
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Answer: 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.
Explanation:
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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