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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.

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

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

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this activity, learners count and measure kidney beans to explore natural selection and variation. Learners measure the length of 50-100 beans.

Learners use a variety of beans to represent a variety of species, and scatter these beans over a large piece of paper representing the environment.

In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.

In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

In this outdoor activity, learners discover how the environment around a building affects the growth of plants.

In this activity, learners test exhaled breath for carbon dioxide and learn how to use an indicator as a simple way to measure pH.

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.

In this activity, learners investigate various appliances and electronics, discovering how much energy each uses and how much carbon dioxide (CO2) is released to produce that energy.

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.

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

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.