Rate of Diffusion investigation

Designed for an observation lesson- focusing particularly on differentiation. Presentation is simple in its instruction and is differentiated in terms of out come. Paired work and group work focus. Practical investigation worksheets with differentiation on maths ability which can be amended further depending on ability. Final part of the lesson focused on applying new knowledge of diffusion to rate of diffusion work sheet and within human gas exchange. Could be used for starter for the next lesson. 1 of the work sheets has extension activities. Pair taught, and then pupils relay the information they have used on their sheet to their partner. Keywords: Diffusion, surface area/ volume ratio, Rate, gases, liquids, gas exchange, concentration gradient, diffusion pathway.