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Natural Water Filters

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In this lesson, students will explore how gravity and the layers of the Earth's crust work together to filter contaminated water. Students will build a water filter and test the water filter with muddy, murky water. Students will learn that the process is slow both with their own water filters and naturally on Earth. Student's will also see how gravity pushes the water down and the natural materials each play a role in trapping different debris.

Lesson Grade Level

7th Grade

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Part 1: Rotation and Revolution (of Earth) Phenomenon: Why do we experience periods of day and night? This is a 1 to 3-day lesson with five activities primarily focusing on rotation of the Earth which