Did you read the Student Guide carefully?
✔ CX Vmaterial used as the membrane
✔ CVamount of substances used
✔ CVnumber of trials
X C✔ Vwhether the molecules diffused through the membrane (tubing)
Now label the variables: Molecule size is the ✔ independentdependent variable. The ability of the
material to diffuse is the independent✔ dependent variable.
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Instruction