Diffusion Lab (Day #3 of 3)

Unit 2: 2) Cells ("Form and Function")
Lesson 13 of 20

Objective: 1. Students will be able to investigate the effect of molecule size on diffusion through a semi-permeable membrane. 2. Students will be able to collect evidence and use it to develop a claim and compose an argument about the permeability of an artificial membrane. 3. Students will be able to use a scientific model to share and expand one’s thinking about the nature and function of cell membranes.

Big Idea: Cell membranes are semi-permeable. Diffusion of substances across the membrane is driven largely by the size of the solute particle.

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