Biology (Separate Science) · GCSE · AQA · AQA GCSE Biology - Higher Tier - (8461) · Specification point · 4.1.3.2 · Cell biology · Transport in cells
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4.1.3.2 Osmosis
| Content | Key opportunities for skills development |
|---|---|
Water may move across cell membranes via osmosis. Osmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane. | WS 1.2 Recognise, draw and interpret diagrams that model osmosis. |
Students should be able to: • use simple compound measures of rate of water uptake • use percentages • calculate percentage gain and loss of mass of plant tissue. | MS 1a, 1c |
Students should be able to plot, draw and interpret appropriate graphs. | MS 4a, 4b, 4c, 4d |
Required practical activity 3: investigate the effect of a range of concentrations of salt or sugar solutions on the mass of plant tissue.
AT skills covered by this practical activity: AT 1, 3 and 5.
This practical activity also provides opportunities to develop WS and MS. Details of all skills are given in [Key opportunities for skills development].