Ans: The transfer of heat through matter without the actual movement of particles from their position is called conduction
conduction occurs in solids , liquids and gases but solids usually conduct heat better than liquids or gases.
if one end of a metal spoon is heated with a flame , the other end will also get heated up after a while . the heat energy is transferred from one end of the spoon to the other without the actual movements of particles . (atoms or molecules) of the spoon.
Observing Conduction:
1.push one end of the metal rod or knitting needle into the cork. use the cork as a handle
2.Light the candle burning candle will melt and change into liquid wax. on to the rod at three different points . let the wax cool.
3. Heat the rod on the candle. note the time when the wax at three different points melt.
Q: Good and bad conductors....?
Ans: Good Conductors.
Materials which allow heat to flow through them easily are called good conductors of heat
Examples:
solids such as metal are good conductors of heat.
Bad conductors:
Materials which do not allow heat to flow through then easily are called bad conductors of heat or heat insulators.
Examples:
Solids such as wood , glass , plastic , styrofoam , etc. are bad conductors of heat.
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Good Conductors
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Insulators
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Silver
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Air
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Copper
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Cork
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Aluminium
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Giass
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Iron
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Plastic
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mercury
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wood
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