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Learners are given mysterious white powders and have to determine their identity with chemical tests.

Learners carefully look at four known household crystals.

In this activity, learners design a crushing test and discover that identifying and controlling the variables may be difficult.

In this activity, learners will develop a method to test five similar-looking powders (baking soda, baking powder, cream of tartar, detergent, and cornstarch) with four test liquids (water, vinegar, i