compound (silicon dioxide/quartz); concrete is the only one that contains the other two; concrete is the strongest when mixed with water.) Lesson 9Ed: Problems with materials Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Acid rain revision n/a Resources n/a Students carry State the meaning of: biodegradable, Write the words rain’ on the from 9Ed out an ‘acid non-biodegradable. board and ask students for their ideas Exploring experiment to Recall examples of pollutants released about what it means. Demonstrate Science. investigate the by burning fossil fuels and impurities in blowing into a jar of water with speed at which fuels. universal indicator added. Ask different types Explain how sulfur dioxide and students what causes the change and of waste nitrogen oxides help to acid rain. then what this means for the pH of materials break Explain how atmospheric gases help to natural rainwater. down when cause the greenhouse effect. buried in the Recall some problems with the disposal Exploring: Breaking down soil, as they are of artificial polymers. Students out an experiment to in landfill sites. Securing investigate the speed at which Explain why biomagnification of toxins different types of waste materials can occur. break down when buried in the soil, Explain how some of the problems of as they are in landfill sites. artificial polymers can be overcome. Suggest ways of reducing the Explaining: Chlorofluorocarbons greenhouse effect on Earth. Describe CFCs, their uses, their Exceeding problems and how the problems can Describe the properties and uses of be overcome. Ask students to write chlorofluorocarbons (CFCs). some notes on CFCs that address Explain the link between CFCs and skin certain questions, such as: What are cancer, and how the problem can be CFCs? Why were they used? What solved. effect do they have on ozone? Plenary: Thinking about material problems
compound (silicon dioxide/quartz); concrete is the only one that contains the other two; concrete is the strongest when mixed with water.) Lesson 9Ed: Problems with materials Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing State the meaning of: biodegradable, non-biodegradable. Recall examples of pollutants released by burning fossil fuels and impurities in fuels. Explain how sulfur dioxide and nitrogen oxides help to acid rain. Explain how atmospheric gases help to cause the greenhouse effect. Recall some problems with the disposal of artificial polymers. Securing Explain why biomagnification of toxins can occur. Explain how some of the problems of artificial polymers can be overcome. Suggest ways of reducing the greenhouse effect on Earth. Exceeding Describe the properties and uses of chlorofluorocarbons (CFCs). Explain the link between CFCs and skin cancer, and how the problem can be solved. Starter: Acid rain revision Write the words ‘acid rain’ on the board and ask students for their ideas about what it means. Demonstrate blowing into a jar of water with universal indicator added. Ask students what causes the change and then what this means for the pH of natural rainwater. Exploring: Breaking down Students out an experiment to investigate the speed at which different types of waste materials break down when buried in the soil, as they are in landfill sites. Explaining: Chlorofluorocarbons Describe CFCs, their uses, their problems and how the problems can be overcome. Ask students to write some notes on CFCs that address certain questions, such as: What are CFCs? Why were they used? What effect do they have on ozone? Plenary: Thinking about material problems n/a Resources from 9Ed Exploring Science. n/a Students carry out an experiment to investigate the speed at which different types of waste materials break down when buried in the soil, as they are in landfill sites.
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