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STC Program: Chemical Tests, 3rd Edition

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Grades 2-4. While introducing students to the science of chemistry, the Chemical Tests unit also requires tudents to apply critical thinking skills to discover the identity of an unknown powder and solve other mysteries. Throughout the unit, students explore five common household chemicals: sugar, alum, talc, baking soda, and cornstarch. They record their own data in tables and analyze and interpret the data to make predictions and draw conclusions.

 
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Grades 2-4. While introducing students to the science of chemistry, the Chemical Tests unit also requires students to apply critical thinking skills to discover the identity of an unknown powder and solve other mysteries. Throughout the unit, students explore five common household chemicals-sugar, alum, talc, baking soda, and cornstarch. They begin with simple observations that focus on color, form, and texture. Then, students investigate how each interacts with water, vinegar, iodine, and red cabbage juice. Students record their own data in tables and analyze and interpret the data to make predictions and draw conclusions based on their experience with the inquiries. Students communicate their results and conclusions orally and in writing. At the end of the unit, students apply the skills they have developed to identify unknown liquids using solids they have investigated.
 
 
 

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