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In this outdoor, sunny day activity, learners experiment with paper leaf models to discover how some desert plants conserve water.

In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.