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STC Program: Changes, 3rd Edition

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Developing their knowledge of states of matter, students learn to describe the properties of solids, liquids, and gases and categorize them by their identifiable properties in Changes. Students investigate the freezing, melting, evaporation, and condensation of water as an introduction to phase change. Rusting, dissolving, crystallization, gases created by effervescent tablets, and ink separated through chromatography are other phase changes students create and observe in the lab.

 
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Grades 1-3. Developing their knowledge of states of matter, students learn to describe the properties of solids, liquids, and gases and categorize them by their identifiable properties in Changes. Students investigate the freezing, melting, evaporation, and condensation of water as an introduction to phase change. Rusting, dissolving, crystallization, gases created by effervescent tablets, and ink separated through chromatography are other phase changes students create and observe in the lab. This unit strengthens students’ ability to observe and describe the properties of solids, liquids, and gases. It also gives students many opportunities to predict results, plan and perform simple tests, and analyze, interpret, and discuss their results. Students have several opportunities to practice their new skills in lessons in which they devise ways of separating a mystery mixture, and plan and carry out investigations that involve other changes.

 
 
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