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In this activity, learners explore clouds and how they form.

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 build one or more edible coral polyps and place them together to form a colony.

In this activity, learners make a model of a pollution spill that occurred at Bangs Lake in Mississippi and measure water quality parameters in their model.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

Working in groups, learners model the continuous destruction and creation of ozone (O3) molecules, which occur in the ozone layer.