Unit Test Answers

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.