HEAT -POST -8

May 02, 2020

Heat  post 8

( Conduction  part ii)

 Welcome back to class. During the last class we learnt a little bit  about conduction. Today we will learn that the extent to which heat is conducted varies from material to material.








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Click on the link below to learn about good and bad conductors
https://youtu.be/14U58r8D4Qg


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Click on the link below that shows us once again that conductivity of heat varies from material to material. :
https://www.youtube.com/watch?v=Ry8yXhCxclA&feature=youtu.be

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Click on the following link to learn more about bad conductors of heat:
https://youtu.be/_PhwplXtLH


 

 Snow and ice are natural insulators. Once warmed, an igloo maintains its inside warmth with little more than body heat and the light of an oil lamp.

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DO THE QUESTIONS GIVEN BELOW IN YOUR NOTEBOOK.


Q 20) Write an experiment to prove that water is a poor conductor of heat.
AnS)  Experiment to prove that Water is a poor conductor of Heat.
 

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Q 21) Define the terms given below-
a) A GOOD CONDUCTOR of HEAT :Materials that allow heat to flow through them easily are termed Good Conductors of Heat. eg.Silver, copper, Aluminium

b) A POOR Conductor of Heat: Materials that do not allow heat to flow through them easily are called Poor Conductors of Heat. eg.Water, air and glass

c) A Non Conductor of Heat : Materials that do not allow heat to  flow through them. eg wood,, bakelite

d) An Insulator : A material  that does not allow heat or electricity to pass through  it is termed an Insulator.eg rubber

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HW

As a recap, watch the following video on good and bad heat conductors:
https://www.youtube.com/watch?v=14U58r8D4Qg&feature=youtu.be 

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