Properties of Soil: Dispersion and Flocculation

Add a little salt to your soil and see what happens. A video demonstration shows how soil with high and low sodium content interacts with water. A quick experiment demonstrates the properties of dispersion and the role sodium has in the dispersion of soil.

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Instructional Ideas
  • Ask learners to bring in samples of soil to analyze the sodium content using the methods in the video
  • Have individuals brainstorm the implications of high and low sodium content in soils
Classroom Considerations
  • Expects pupils to be familiar properties of solutions
  • This resource is only available on an unencrypted HTTP website. It should be fine for general use, but don’t use it to share any personally identifiable information
Pros
  • Instructor makes connections between the soil properties and their implications
  • Highlights key scientific concepts
Cons
  • None