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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 calculate the number of milliliters of water a nearby tree transpires per day.

In this activity, learners explore liquid crystal thermometers to observe how heat flows by conduction, convection, radiation, and evaporation.