conductor of electricity; poly(ethene) is the only polymer.) Lesson 9Ec: Composite materials Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Pykrete Explaining: Resources n/a Students make Recall some examples of common Tell students about pykrete, the from 9Ec a biocomposite Composites composites (e.g. plywood, paper, composite material made by freezing Go on to discuss Exploring container. concrete). a mixture of wood chips or paper with the justification Science. State the meaning of: composite. water. Then demonstrate the of using certain Explain how the properties of properties of ice and pykrete using composites for composites make them useful. pre-prepared samples. particular jobs, Identify thermal decomposition including the reactions. Exploring: Investigate biocomposites economy and the Securing Students make a biocomposite use of Justify the use of a composite material container and then discuss the sustainable for a application. advantages and disadvantages materials. Classify (using temperature change) that this biocomposite might have and explain (in terms of energy over other materials when it is used transfer) exothermic or endothermic to make this type of container. reactions. Exceeding Explaining: Composites Explain why modifications in the Provide information on the properties manufacture of a certain composite of different composites (e.g. GRP, (e.g. paper, concrete) can change its Kevlar®, safety glass, concrete and properties. carbon fibre) and ask students to suggest the composite best suited to particular uses. Discuss with the class the different types of composite structures that can be produced. Plenary: Thinking about composites Odd One Out: cement, sand, concrete. (Possible answers: sand is the only one found naturally; sand is the only one that is mainly one
conductor of electricity; poly(ethene) is the only polymer.) Lesson 9Ec: Composite materials Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Recall some examples of common composites (e.g. plywood, paper, concrete). State the meaning of: composite. Explain how the properties of composites make them useful. Identify thermal decomposition reactions. Securing Justify the use of a composite material for a application. Classify (using temperature change) and explain (in terms of energy transfer) exothermic or endothermic reactions. Exceeding Explain why modifications in the manufacture of a certain composite (e.g. paper, concrete) can change its properties. Starter: Pykrete Tell students about pykrete, the composite material made by freezing a mixture of wood chips or paper with water. Then demonstrate the properties of ice and pykrete using pre-prepared samples. Exploring: Investigate biocomposites Students make a biocomposite container and then discuss the advantages and disadvantages that this biocomposite might have over other materials when it is used to make this type of container. Explaining: Composites Provide information on the properties of different composites (e.g. GRP, Kevlar®, safety glass, concrete and carbon fibre) and ask students to suggest the composite best suited to particular uses. Discuss with the class the different types of composite structures that can be produced. Plenary: Thinking about composites Odd One Out: cement, sand, concrete. (Possible answers: sand is the only one found naturally; sand is the only one that is mainly one Explaining: Composites Go on to discuss the justification of using certain composites for particular jobs, including the economy and the use of sustainable materials. Resources from 9Ec Exploring Science. n/a Students make a biocomposite container.
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