State what happens at a material's solid has fully dissolved. Then ask: Give this practical techniques of boiling point. How could we get the solid back out context by filtering and Securing of the mixture?/What would happen if providing evaporation. Use a knowledge of dissolving to we left the solution for a few days? of rock ‘samples’ decide how mixtures should be Answers should include a description salt from Students separated. and an explanation. different mines, practise Exceeding and ask students evaporation of Justify the decision to separate a Exploring: Making salt from rock salt to determine copper sulfate solution in a certain way. Students obtain samples of pure salt which would be solution to Working Scientifically from rock salt, using the techniques the best to dryness. ‘mine’ Identify to themselves and others of filtering and evaporation. use for making salt. and state the meaning of: risk, hazard. Explaining: Heating to dryness Explain why a certain safety instruction demonstration Explaining: has been given, and describe how to Demonstrate or let students practise Heating to control familiar risks. evaporation of copper sulfate solution dryness Recognise a range of risks and plan to dryness. demonstration appropriate safety precautions. Discuss the Justify chosen methods of risk Plenary: Thinking skills hazards reduction. Odd One Out: Drying nail varnish, associated with Carry out an experiment safely by boiling water, disappearing rain heating for too following all safety recommendations. puddle. (Possible answers: boiling long. water because other two are examples of evaporation, drying nail varnish because it involves a solvent other than water.) Lesson 7Ed: Chromatography Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Chromatography introduction Explaining: Resources n/a Students Give examples of where Demonstrate chromatography to the Chromatography from 7Ed produce chromatography is used, and describe whole class using a dark-coloured using other Exploring chromatograms how chromatography is used to water-based ink that includes a range solvents Science. of water-soluble separate mixtures. of different colours. Challenge substances Securing students to (e.g. felt tip Exploring: Chromatography analysis suggest pens, food
State what happens at a material's boiling point. Securing Use a knowledge of dissolving to decide how mixtures should be separated. Exceeding Justify the decision to separate a solution in a certain way. Working Scientifically Identify to themselves and others and state the meaning of: risk, hazard. Explain why a certain safety instruction has been given, and describe how to control familiar risks. Recognise a range of risks and plan appropriate safety precautions. Justify chosen methods of risk reduction. Carry out an experiment safely by following all safety recommendations. solid has fully dissolved. Then ask: How could we get the solid back out of the mixture?/What would happen if we left the solution for a few days? Answers should include a description and an explanation. Exploring: Making salt from rock salt Students obtain samples of pure salt from rock salt, using the techniques of filtering and evaporation. Explaining: Heating to dryness demonstration Demonstrate or let students practise evaporation of copper sulfate solution to dryness. Plenary: Thinking skills Odd One Out: Drying nail varnish, boiling water, disappearing rain puddle. (Possible answers: boiling water because other two are examples of evaporation, drying nail varnish because it involves a solvent other than water.) Give this practical context by providing ‘samples’ of rock salt from different mines, and ask students to determine which would be the best ‘mine’ to use for making salt. Explaining: Heating to dryness demonstration Discuss the hazards associated with heating for too long. techniques of filtering and evaporation. Students practise evaporation of copper sulfate solution to dryness. Lesson 7Ed: Chromatography Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Give examples of where chromatography is used, and describe how chromatography is used to separate mixtures. Securing Starter: Chromatography introduction Demonstrate chromatography to the whole class using a dark-coloured water-based ink that includes a range of different colours. Exploring: Chromatography analysis Explaining: Chromatography using other solvents Challenge students to suggest Resources from 7Ed Exploring Science. n/a Students produce chromatograms of water-soluble substances (e.g. felt tip pens, food