Science at key stage 3 (Year 7)

Unit 7J: Electrical circuits
Section 7: a. What kinds of circuits are useful and what are the hazards?

Objectives

Children should learn:

to compare and contrast series and parallel circuits
to plan a circuit as a model of a domestic ring main

Activities		Outcomes
		Children:
Demonstrate extensive series and parallel circuits, eg some commercial Christmas tree light sets and a model ring main, to prompt discussion of the advantages of parallel connections. Ask pupils to make a plan of a circuit and draw up a component list, eg use a single low-voltage power supply to build a ring main to supply five rooms with electric lighting; switches should be used to control the circuits.		use ideas about series and parallel circuits to help decide on a plan describe the advantages and disadvantages of different circuit connections

Points to note

Safety

the low-voltage unit may trip if the current is too high. This can provide a link to the next activity

Sections in this unit

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This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.


	1. a. How do electrical circuits work?
	2. b. How do electrical circuits work?
	3. a. What happens in a circuit?
	4. b. What happens in a circuit?
	5. a. How can we explain what happens in electrical circuits?
	6. b. How can we explain what happens in electrical circuits?
	7. a. What kinds of circuits are useful and what are the hazards?
	8. b. What kinds of circuits are useful and what are the hazards?
	9. c. What kinds of circuits are useful and what are the hazards?
	10. Reviewing work

Science at key stage 3 (Year 7)

Objectives

Activities

Outcomes

Points to note

Sections in this unit