Suggested Timeline

Diffusion, Osmosis and Cell Membranes

Class Schedule

This unit should take ten days to complete, depending on the level of ability of the students. The following is a recommended schedule:

Day 1: Discussion of the requirements of cells and the functions of the cell membrane. Pre-laboratory discussion of Osmosis in Elodea Cells.
Day 2: Exploratory Activity: Osmosis in Elodea Cells. Post-laboratory discussion.
Day 3: Pre-laboratory discussion. Exploratory Activity: Dynamic Equilibrium. Post-laboratory discussion.
Day 4: Pre-laboratory discussion. Exploratory Activity: Factors Affecting Diffusion, Part 1.
Day 5: Exploratory Activity: Factors Affecting Diffusion, Part 2. Post-laboratory discussion.
Day 6: Pre-laboratory discussion. Exploratory Activity: Osmosis.
Day 7: Post-laboratory discussion. Discussion of experimental design.
Day 8: Experiment: Osmosis and Blood Cells.
Day 9: Post-laboratory discussion. Review of concepts.
Day 10: Quiz.