solutions in the soil. Plants require ions for Aiming for Grade 6 LOs: low to a high concentration (against the concentration gradient). A adaptation for healthy growth. process called active transport is used, which requires energy. transport Explain why active transport is Plant roots (10 min) Ask students to write down what substances It also allows sugar molecules to be absorbed important for living organisms. move into roots from the soil. Then ask them what process moves from lower concentrations in the gut into the Explain the differences between water into the plant roots. Explain that osmosis is used because water Interactive: blood which has a higher sugar concentration. diffusion, osmosis, and active is travelling from a high to low concentration. Explain that mineral ions Active transport. Sugar molecules are used for cell respiration. transport. cannot move into roots via diffusion because they are very dilute in Suggest some limitations the soil. Because they have to move from a low to high concentration Students should be able to: of/improvements to a representational of mineral ions (against the concentration gradient) a process called model that shows active transport. describe how substances are transported into • active transport is used which requires energy. and out of by diffusion, osmosis and active Aiming for 8 LOs: transport Main Describe how active transport takes explain the differences between the three • Active transport (20 min) Introduce active transport to students. place. processes. Ask them to use information from the student book to fi nd one Suggest how a cell that carries out example of where active transport is used in humans and explain why active transport is adapted to this it is important. Students then work in small groups to design a model function. of active transport. Ask for a couple of groups to demonstrate their Design and evaluate a representational model, whilst the rest of the students evaluate its effectiveness and model to show active transport. comment on possible improvements. Plenaries Exchange of materials (10 min) Give students a series of statements on osmosis, diffusion, and active transport. Students identify which statements relate to which process. Active transport (10 min) Students label a diagram of active transport, then match some key words relating to active transport to their definitions.
solutions in the soil. Plants require ions for healthy growth. It also allows sugar molecules to be absorbed from lower concentrations in the gut into the blood which has a higher sugar concentration. Sugar molecules are used for cell respiration. Students should be able to: • describe how substances are transported into and out of by diffusion, osmosis and active transport • explain the differences between the three processes. low to a high concentration (against the concentration gradient). A process called active transport is used, which requires energy. Plant roots (10 min) Ask students to write down what substances move into roots from the soil. Then ask them what process moves water into the plant roots. Explain that osmosis is used because water is travelling from a high to low concentration. Explain that mineral ions cannot move into roots via diffusion because they are very dilute in the soil. Because they have to move from a low to high concentration of mineral ions (against the concentration gradient) a process called active transport is used which requires energy. Main Active transport (20 min) Introduce active transport to students. Ask them to use information from the student book to fi nd one example of where active transport is used in humans and explain why it is important. Students then work in small groups to design a model of active transport. Ask for a couple of groups to demonstrate their model, whilst the rest of the students evaluate its effectiveness and comment on possible improvements. Plenaries Exchange of materials (10 min) Give students a series of statements on osmosis, diffusion, and active transport. Students identify which statements relate to which process. Active transport (10 min) Students label a diagram of active transport, then match some key words relating to active transport to their definitions. adaptation for transport Interactive: Active transport. Aiming for Grade 6 LOs: Explain why active transport is important for living organisms. Explain the differences between diffusion, osmosis, and active transport. Suggest some limitations of/improvements to a representational model that shows active transport. Aiming for 8 LOs: Describe how active transport takes place. Suggest how a cell that carries out active transport is adapted to this function. Design and evaluate a representational model to show active transport.
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