Download - Unit 7.2(Conductors and Insulator)
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Unit 7.2
HEAT CONDUCTORS & HEAT INSULATORS
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CONDUCTORS
a) Are substances which conduct heat rapidly
b) Metal are good conductors of heat.
c) Good conductor become hot @ cold quickly
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INSULATORS
a) Are poor conductors @ substances which do not conduct heat.
b) Non-metals, liquids (except mercury) & gases are insulators.
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conductors
silver
copper
aluminium
zinc
iron
lead
mercury
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INSULATORS
AIR,VACUUM
ASBESTOS
PLASTIC
POLYSTYRENE
WATER,ICE
GLASSRUBBE
R WOOD
FELT,COTTO
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Guess it!
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Guess it!
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Uses of heat conductors in daily life
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Cooking utensils Conduct heat quickly and easily to the food and thus save fuels
Electrical appliances made of iron or stainless steel that conducts heat well.
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Uses of heat insulators in daily life
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Asbestos sheets To prevent table from being damaged by hot kitchenware or objects
Woolen blanket Keep the body warm on cold days.
Polystyrene foam Keep food warm.
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