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Activity 2: Water Filtration – Natural Surfaces versus Impervious Surfaces

165 minutes
Primary subjects: 
6, 7, 8
Average: 4 (1 vote)

In this lesson, students learn the value of clean freshwater and the natural processes that ensure an adequate supply of usable freshwater. In activity 2, students conduct a hands-on activity that focuses on the role of natural areas as filters that produce clean water. Such natural filters are contrasted with impervious (paved) areas to compare the impact of development on the ability of nature to provide clean freshwater.

Key objectives for students
Identify the difference between natural areas and impervious surfaces.
Distinguish between different kinds of impervious surfaces.
Explain the importance of water quality as it relates to water being a limited resource.
Compare differences in run-off volume and quality between natural areas and impervious surfaces.
Characterize the different parts of the water cycle and how they are impacted by human activity.
Generalize about the impacts of water quality on human health.
Calculate differences in run-off volume between natural areas and impervious surfaces.
Contrast features of natural areas and impervious surfaces that lead to differences in runoff volume and water quality.
Solve quantifiable problems related to run-off volume and water quality in natural areas and impervious surfaces.
Water, natural resources, Filtration
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