That a switch canbe used to break a circuit.
That somematerials are better electrical conductors than others.
To represent seriescircuits using drawings and conventional symbols.
Recap vocab - conductors andinsulators. What do these words mean in relation to electricity?Display a variety of different materials and ask the pupils topredict which material with conduct electricity and which wont andbe insulators.
Introduce switches and askquestions such as why they are useful and how do the pupils thinkthey work. Explain that today they will be making 2 switches usingthe given materials - a push/ pressure switch and a turn switchusing a paper clip.
Explain that to reduce the timetaken scientists and electricians use specific symbols to draw theelectrical components in a circuit. Use the IWB to show the symbolsused for the different components e.g. circle with a cross in for alight bulb.
Allow pupils time to work ingroups to check their predictions. Ask pupils to conclude the typesof materials that are insulators/ conductors. Discuss theseconclusions together.
Pupils will create 2 kinds ofswitches using the conducting materials supplied.
Extension ask pupils torecord why the given material to make the switch was used e.gpaperclip, tinfoil, drawing pin all metal.
Tell pupilsthe specific rules when drawing circuits in this way e.g. straightlines, no breaks. Explain how batteries are represented in terms ofcells.
Using whiteboardsask pupils to draw a named circuit e.g. a circuit with a 2-cellbattery and 1 bulb. Pupils will then be given out sheets withcircuits drawn in symbolic form for them to explain whichcomponents are in the shown circuits.
Pupils will begiven previous Science SATs questions on electricity to work inpairs and answer.
Criterion:Do theyunderstand the function and properties of conductors andinsulators? Can they create 2 kinds of switches using theconducting materials supplied?
How:Group discussion,practical work, feedback to class. Working with circuitcomponents, conductors and insulators.
Criterion:Do theyunderstand the function and properties of electricity symbols? Canthey create drawings ofcircuits using the conventional symbols?
How:Group discussion,written work, feedback to class.
Pencils, foil,paper clips, batteries, bulbs.
Whiteboards andpens, past SATS questions.
English: extensionof vocabulary