This lab goes along with the concepts of diffusion and osmosis across a semi-permeable membrane. The lab supplies are easy to obtain if you don't already have them on hand. It requires two days for the students. The first day takes about 40-45min and the second day takes about 20-30 to set up, observe, answer questions, draw diagrams, and clean up. This lab also reviews relevant vocabulary terms like: osmosis, diffusion, concentration, concentration gradient, hypotonic, hypertonic, isotonic, and solution. It also requires them to make measurements and draw diagrams.