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

In this activity, learners discover if carbon dioxide has an effect on temperature.

In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.

In this activity, learners observe the hydrologic cycle in action as water evaporates and condenses to form rain right before their eyes.