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This activity (on pages 16-23) lets learners measure each other's vital signs—the signs that help doctors understand what's going on in a patient body.

In this activity, learners explore the invisible infrared radiation from an electric heater.

In this activity, learners make their own heat waves in an aquarium.

In this activity, learners discover that our hands are not reliable thermometers.

In this activity, learners create a biosphere in a baggie.