Reflection: Student Ownership Diffusion Lab (Day #2 of 3) - Section 4: Closure: What did we learn? Where do we go from here?


Victor (featured in the Closure video) really impressed me with what he was able to articulate. He was able to correctly frame his team's question and hypothesis as well as reason through why he predicted things to go as he expected. Unfortunately his premise was incorrect (the relative size of starch molecules in comparison to the pores in the dialysis tubing) however his conclusion logically followed! The main point here is that he is thinking in a systematic way and fully understood the design of the lab and how the model (dialysis tubing) could help answer his question! Go Victor!

  In his (very articulate) own words...
  Student Ownership: In his (very articulate) own words...
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Diffusion Lab (Day #2 of 3)

Unit 2: 2) Cells ("Form and Function")
Lesson 12 of 20

Objective: 1. Students will investigate the effect of molecule size on diffusion through a semi-permeable membrane. 2. Collect evidence and use it to develop a claim and compose an argument about the permeability of an artificial membrane. 3. 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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