Lesson Overview
Students will conduct a hands-on experiment to create ice cream using cooling, observing the change of state from liquid to solid. They will then compare this reversible change with examples of irreversible changes caused by heating or cooling, constructing an argument with evidence to support their understanding.
Essential Question
How does changing the temperature of matter sometimes create changes we can undo, like making ice cream, and other times create changes that are much harder or impossible to reverse?
Grade(s):
Subject(s):
Recommended Technology:
Other Instructional Materials or Notes:
2
Materials:
- For each student:
- 1 small resealable plastic bag (snack size)
- 2 individual serving-sized prepackaged, FLAVORED coffee creamers (approx. 12-15 ml each)
- Approximately 2 cups of ice
- ΒΌ cup rock salt or ice cream salt
- Small spoon or craft stick for eating
- Paper towel
- Safety goggles (optional, but recommended for handling salt and cold)
- For the class:
- Chart paper or whiteboard
- Markers
- Pictures or examples of irreversible changes caused by heating or cooling (e.g., baking a cake, burning wood, melting an ice cube completely into water, cooking an egg)
- Teacher-prepared Mini Ice Cream Scoop of Science performance task (linked in the resources tab)
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