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Recrystallization Test
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In this activity, learners recrystallize substances from solutions and make observations about the resulting crystals. This test can help further identify the unknown.
Curious Crystals
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Learners carefully look at four known household crystals.
Solubility Test
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In this activity, learners apply a dissolving test to known crystals to identify the unknown. Since the unknown is chemically the same as one of the known crystals, it should dissolve similarly.
Crushing Test
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In this activity, learners design a crushing test and discover that identifying and controlling the variables may be difficult.