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In this activity, learners explore how air warms when it condenses water vapor or makes clouds.

Cool off in the heat with this project! Learners use simple materials to build a fan that runs on a motor.

In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan.