![Erosion in Different Soils [Erosion Races] Lesson Plan](http://content.lessonplanet.com/resources/thumbnails/140405/large/cgrmlwnvbnzlcnqymdezmdmyos01nde3lxfmmzy0dc5qcgc.jpg?1414240121 "Erosion in Different Soils [Erosion Races] Lesson Plan")
![Erosion in Different Soils [Erosion Races] Lesson Plan](http://content.lessonplanet.com/resources/thumbnails/140405/original/cgrmlwnvbnzlcnqymdezmdmyos01nde3lxfmmzy0dc5qcgc.jpg?1414240121 "Erosion in Different Soils [Erosion Races] Lesson Plan")
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Fourth graders review how erosion can happen by wind, water, and gravity which they studied in previous lesson plan. They attempt to discover if all soils erode at the same rate. In small groups, 4th graders experiment with three different types of soil to determine erosion rates.
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