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Crazy fact—freezing liquid actually gives off heat! Young scholars investigate the transfer of energy when liquids freeze using a chemical heat pack. The heat pack gives off heat as its liquid core freezes.
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Concepts
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Instructional Ideas
- Repeat the experiment with an ice pack to verify results
Classroom Considerations
- Requires the use of instant heat packs for each group of pupils
- Expects a basic understanding of thermal energy
Pros
- Includes an extension exercise
- Provides information about the scientific principles of the experiment
Cons
- None