This lesson has been designed to help students visualize how diffusion occurs by creating a macro version of a permeable membrane. The goal is to have students see how molecular size (atomic radii) impact diffusion at the nanoscale. In addition, they will observe diffusion rates of iodine with varying percentages of agarose solutions. These two activities will be used to introduce students to diffusion and evaluate their understanding of the concepts of diffusion and density. The lesson also is designed to help students better comprehend the interaction of molecules on the nanoscale.

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Ryan Stuart

Research Experience for Teachers Program NSF # EEC-1200925; National Nanotechnology Coordinated Infrastructure NSF # ECCS 1616183

Researchers should cite this work as follows:

• Ryan Stuart, NNCI Nano (2020), "Visualizing Diffusion in Real Time and on a Macroscle," https://nanohub.org/resources/31908.

  BibTex | EndNote

1. atomic radii
2. biology
3. chemistry
4. diffusion
5. high school
6. K-12
7. molecular interactions
8. Nanoscience and Nanotechnology
9. NNCI Educational Materials
10. size and scale