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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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Concepts
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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 video is hosted on YouTube
Pros
- Instructor makes connections between the soil properties and their implications
- Highlights key scientific concepts
Cons
- None