Cell Size and Diffusion Kit
Grade 6-College. Diffusion, which results from the random movement of molecules and other small particles, is essential to the life of a cell. In this kit's activities, students use agar cell models to observe the results of diffusion over a period of 10 min. Students then reinforce the results by using calculations to explore the relationship between diffusion rates and cell size and the importance of the ratio of a cell's surface area to its volume. For a class of 32.