Create a model to study a microscopic phenomenon. The seventh of 12 lessons uses an egg (without its shell) to represent a cell membrane. Using different solutions, learners explore the concept of cell diffusion. They monitor measurements of the egg before and after being exposed to the liquids. A comparison of the measurements allows individuals to make conclusions about the permeability of the membrane.

Concepts

diffusion, permeability, cell membranes

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Additional Tags

science

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Instructional Ideas

• Have pupils complete the lab write up electronically and add pictures of the eggs with their corresponding measurements

Classroom Considerations

• Lab preparation requires three days to dissolve egg shells
• Expects a basic understanding of cell components and cell diffusion

Pros

• Provides background information for use before the lab activity
• Includes a teacher guide with a sample solution key

Cons

• None