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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.

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

Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

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.