Thermal Conductivity

These two short videos, produced by the National STEM Learning Centre, illustrate the process of thermal conductivity. The first video shows a demonstration of thermal conductivity using ice, plastic and aluminium blocks. Alom Shaha explains the process involved. The second video simply shows the effect of the different blocks on the ice.

This demonstration can form the introduction to a structured development of ideas about energy transfers between objects at different temperatures. Ice cubes are placed on metal and plastic blocks; the cube placed on metal melts much more quickly than the cube placed on plastic. This is counterintuitive (for many students) because metals feel cold while plastics feel warm.

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asober

I have done this demo many times before, but I normally use the back of a pan and a plastic tray. What I really liked in your version is using the temperature probes to convince the learners that the two really are at the temperature! This is very useful!
I really liked the question to predict what will happen and this is perhaps something that is missing in some of the other videos!?!
Thanks for another great video.

almar

Is there a UK supplier where the blocks can be purchased - they are available from US but shipping is expensive

Anna Richardson

Hello,

Timstar website might be a good start:

http://www.timstar.co.uk/Item/NA/HE92305/ICE_MELTING_KIT.html

Regards,

Anna