Chemical Tests (3rd grade)

This unit introduces third-graders to the science of chemistry by challenging them to explore and determine the identity of five common household chemicals: sugar, alum, talc, baking soda, and cornstarch. Students begin by focusing on the physical properties of color, form, and texture. Next, they explore chemical properties by observing how the five powders interact with water, vinegar, iodine, and red cabbage juice. These tests enable them to explore phenomena such as crystallization and to observe the processes of evaporation and filtration.

Finally, students apply their skills and their knowledge of the five chemicals to identify a variety of "mystery" mixtures. As a result of conducting these investigations, students develop scientific skills such as observing and recording results, forming conclusions on the basis of experience, communicating results, and applying their knowledge to solve problems.

Movie clip on Physical vs Chemical change for the Chemical Tests unit (Media, Movies)

Additional Photos

Chemical Tests Storyline (pdf)

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