alarms_switches

alarms_switches - What do you think this is? Why do we have...

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LO: To understand what switches are for and  how they are used? 
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How many switches can you see in  the classroom? 
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How many did you find?  You may have found: Computer switch Light switch Plugs White board switches TV switch Fire alarm switch Radio/ CD player
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Where do we find switches? 
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How many other switches can you  think of……. .   Working in teams     who can think of the most –  brainstorm your ideas!
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Unformatted text preview: What do you think this is? Why do we have switches? What are they for? Why not leave things on all of the time? Switches Are used to turn things on and off Need to make a connection to work Switch is either open (off) or closed (on) Need to form part of a circuit Click this link to see a working switch http://www.schoolscience.co.uk/content/3/phys...
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alarms_switches - What do you think this is? Why do we have...

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