The lesson starts by consolidating learning on diffusion and then introduces the concept of diffusing water. The osmosis investigation in potato chips leads learners through the planning of a trustworthy investigation through to a thorough evaluation in terms of reliability, accuracy and precision. There are particle diagrams for visualisation of moving water particles and keywords needed for explanation of the results. The lesson concludes with a plenary activity, comparing diffusion with osmosis. The next lesson in which looks at the importance of osmosis in living systems is supplied with CIE specific exam questions and mark schemes.
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