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Trail Construction
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In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.

Counting With Quadrants
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Millions of organisms can live in and around a body of water.

Clear Water, Murky Water
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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

TerrAqua Investigation Column: What is the Land-Water Connection?
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In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.

Seedy Travelers
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In this activity (on pages 18-28), learners explore how the shape of seeds affects how they are dispersed by wind, birds, ocean currents and other means.

Water Walk
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Learners take a field trip along a local body of water and conduct a visual survey to discover information about local land use and water quality.

Cool Tool
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In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.

Human Impact on Estuaries: A Terrible Spill in Grand Bay
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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.

Cleaning with Dirt
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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

Trail Impact Study
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In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.