AP Biology Lab 1: Diffusion and Osmosis

Mr. Anderson guides students through an AP Biology lab focusing on diffusion and osmosis. The video explains diffusion as the movement of molecules from high to low concentration and osmosis as the movement of water across a semipermeable membrane. The diffusion lab uses dialysis tubing to demonstrate molecular movement, while the potato lab explores osmosis by measuring mass changes in potato cores placed in various sugar solutions.

Explain the significance of the blue color change observed in the presence of IKI and starch.

How does the concentration of sugar in the solution affect the mass of potato cores?

What happens to potato cores placed in distilled water over time?