State what is meant by electric field, charges, using and recall the shape and direction of Explaining: Van de Graaff generator acetate and the electric field around a charged demonstrations 2 polythene rods. object. Carry out a demonstration to show Describe the effect of an electric field induced charges using a Van de Carry out a on electrically charged objects. Graaff generator: head of hair, demonstration Explain how the transfer of electrons spraying cereal, pie dishes or soap to show induced results in the two materials gaining bubbles. charges using a equal and opposite charges. Van de Graaff Exceeding Plenary: Thinking about static generator. Recall and explain how a charge can electricity be induced in an uncharged object and Odd One Out: copper, glass, use this idea to explain familiar polythene. (Possible answers: copper electrostatic phenomena. is the only one that conducts electricity; copper is the only one that cannot be given a charge of static electricity by rubbing; glass is the only transparent one.) Lesson 9Jc: Current electricity Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Electricity true or false? n/a Resources n/a Show students Identify common symbols for Students work in pairs to write out from 9Jc examples components. five statements about circuits and Exploring of different Recall how the current changes when electricity, of which two should be Science. types of switch. the voltage of the supply changes. deliberately false. They read out one Explain how switches can be used to statement to the class, who decide if control different parts of a parallel it is true or false. circuit. Describe how changing the number or Exploring: Models of circuits type of components in a circuit affects Provide a model to explain how the current. electrical circuits work (e.g. lorries Describe how current and voltage collecting, transporting and behave in series and parallel circuits. depositing material; repeat). Ask Securing students which part of the model Describe how voltage and energy are represents parts of a circuit.
State what is meant by electric field, and recall the shape and direction of the electric field around a charged object. Describe the effect of an electric field on electrically charged objects. Explain how the transfer of electrons results in the two materials gaining equal and opposite charges. Exceeding Recall and explain how a charge can be induced in an uncharged object and use this idea to explain familiar electrostatic phenomena. Explaining: Van de Graaff generator demonstrations 2 Carry out a demonstration to show induced charges using a Van de Graaff generator: head of hair, spraying cereal, pie dishes or soap bubbles. Plenary: Thinking about static electricity Odd One Out: copper, glass, polythene. (Possible answers: copper is the only one that conducts electricity; copper is the only one that cannot be given a charge of static electricity by rubbing; glass is the only transparent one.) charges, using acetate and polythene rods. Carry out a demonstration to show induced charges using a Van de Graaff generator. Lesson 9Jc: Current electricity Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Identify common symbols for components. Recall how the current changes when the voltage of the supply changes. Explain how switches can be used to control different parts of a parallel circuit. Describe how changing the number or type of components in a circuit affects the current. Describe how current and voltage behave in series and parallel circuits. Securing Describe how voltage and energy are Starter: Electricity true or false? Students work in pairs to write out five statements about circuits and electricity, of which two should be deliberately false. They read out one statement to the class, who decide if it is true or false. Exploring: Models of circuits Provide a model to explain how electrical circuits work (e.g. lorries collecting, transporting and depositing material; repeat). Ask students which part of the model represents parts of a circuit. n/a Resources from 9Jc Exploring Science. n/a Show students examples of different types of switch.