AQA Biology Diffusion

Lesson objectives:
Explain what diffusion is and how it occurs.
Explain what affects the rate of diffusion.
Distinguish between facilitated diffusion and diffusion.

All resources included!

This lesson continues with topic 4 transport across cell membranes of unit 2 cells. The lesson begins with a retrieval practice that is aimed at retrieval of information from the previous lesson on cell-surface membranes. The lesson continues to discuss how materials move across membranes. Students are asked to remember the 5 main methods by which substances can move across a cell membrane. Students are then asked to recall what they already know about diffusion. Students continue to learn about simple diffusion and its definition. Student then do more retrieval practice on what they learned from the previous lesson. Students are then asked to recall what they already know about facilitated diffusion. Students continue to learn about facilitated diffusion and its definition. Students then need to think of the factors that can affect the rate of facilitated diffusion. Student then do more retrieval practice on what they learned from the previous lesson. The lesson finishes with independent practice/assessment on simple diffusion and facilitated diffusion.

This lesson is designed to follow Rosenshine’s Principles. It is not an exact replication of this principle.