Senior students investigate osmosis in living cells in a practical skills lesson.
Year 10 GCSE biologists have been learning about osmosis with Dr Parker. In a practical classroom experiment, they discovered how water passes into and out of plant cells by osmosis by cutting a potato into equal sized cylinders – two centimetres each – and immersing these plugs into different concentrations of sucrose solution.
Students weighed the mass of the potato chips before the experiment and weighed them again after they had been in the solution for 40 minutes. By recording the results, they were ably positioned to identity patterns and formulate conclusions.
How did the concentration of sucrose surrounding the plant tissue affect the rate of osmosis? If the chip gained mass, it would have gained water by osmosis. If it lost mass, it would have lost water, again by osmosis.