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Conduction and Insulation
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ConductionThe movement of heat, electricity, or sound
from one object to another object
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Conductors of HeatConductors of heat allow heat energy to pass
through them easily.
Examples of Conductors of heat:• Iron• Copper• Aluminum
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The reason why pots and pans are usually made of metal is so the heat from the stove will pass through the metal and cook whatever is inside. Metal is a good conductor of heat.
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Conduction of Heat
• http://www.youtube.com/watch?v=77R4arwD8G8
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InsulationNot allowing heat, electricity, or sound to pass
through easily
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Insulators of HeatInsulators of heat are poor conductors and do
not allow heat to pass through them
Examples of Insulators of heat:• Wood• Plastic• Cloth• Feathers
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Most cooking utensils are metal but have plastic grips to insulate the heat from traveling to your hands.
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Winter clothes are often made of warm cloth of feathers to insulate you.
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Conductors of ElectricityMaterials that allow electricity to move through
them easily.Examples of conductors of electricity:• Copper • Water
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Most electrical wires are made of copper because it is a good conductor.
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Insulators of ElectricityInsulators of electricity do not allow electricity
to pass through easily.
Examples of insulators of electricity:• Rubber • Plastic
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Most electrical wires are covered with plastic or rubber to prevent electrical shock.
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Questions
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What is conduction?
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Allowing heat, electricity, or sound to pass through easily.
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What is insulation?
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Not allowing heat, electricity, or sound to pass through easily.
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How are conductors and insulators different?
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• Their functions•Conductors are made of
iron, copper, and other metals• Insulators are made of
rubber, plastic, and cloth
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What would we use conductors for?
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•Cooking• Light• Sound• Electricity
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What would we use insulators for?
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•Keeping safe from electrical shock• Staying warm•Keeping drinks cold in a
cooler