Heating And Cooling L2

Conduction of heat ,[object Object],[object Object],Thursday 5 November 2009

Thinking task ,[object Object],Answer: The metal conducts heat away from the hands but wood stops heat flowing from the hand.

Experiment to show conduction of heat ,[object Object],[object Object]

Showing conduction ,[object Object],There are moving particles (electrons) inside the metal – the faster they move the higher the temperature – they bump into each other to allow the heat to flow through the metal.

Liquids are poor conductors of heat [ insulators ]. WEAR SAFETY GLASSES What about gases? Carefully put your finger 1cm away from a Bunsen burner flame. If gases were good conductors, you’d burn your finger - you don’t. Gases are good insulators. Conduction

Copy this summary table into your book : Conduction

Bad points about conduction ,[object Object],[object Object]

Good points about conduction ,[object Object]

Using insulators ,[object Object],[object Object],[object Object]

A model for conduction ,[object Object],[object Object],Questions: Hodder B Pages 28 and 29

Heating And Cooling L2

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Heating And Cooling L2