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STC Program: Changes, 2nd Edition

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Initial activities in the unit expand students' understanding of solids, liquids, and gases by exploring changes in state. Students consider the changes to a single substance-water-as they observe it freeze, melt, evaporate, and condense. Then, through a sequence of lessons, they investigate changes involving mixtures. Student pairs produce mixtures of 2 solids and of solids with liquids and they observe and compare the changes that result. They also set up "dissolving races" with sugar and water.

 
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Initial activities in the unit expand students' understanding of solids, liquids, and gases by exploring changes in state. Students consider the changes to a single substance-water-as they observe it freeze, melt, evaporate, and condense. Then, through a sequence of lessons, they investigate changes involving mixtures. Student pairs produce mixtures of 2 solids and of solids with liquids and they observe and compare the changes that result. They also set up "dissolving races" with sugar and water, in which they observe the effects of sugar particle size and water temperature on the rate at which the sugar dissolves.

The Two-Use Kit comes with all of the great materials you'd expect from the STC Program™, along with a box containing the materials for a second, non-concurrent use. All you need to do is set the box aside until you are ready for it.

 
 
 
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