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In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

Many people get water from a source deep underground, called groundwater.

In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.