Turn up the heat. Individuals conduct two experiments to observe the difference between heated water and air versus cold water and air. Using food coloring, pupils observe the movement of the molecules in the two temperatures of water. A soap bubble helps them see the effects of heated air versus cold air.

Concepts

heat, heat energy, molecules, atoms

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Instructional Ideas

• Make the connection to air and water currents caused by the heating of Earth's surface

Classroom Considerations

• Requires access to ice and hot water
• Part of the larger group of experiments in Adventures in Chemistry Experiments

Pros

• Includes pictures to illustrate the steps of the experiments
• Contains a description of what to expect

Cons

• None