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Conduction and Insulation
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Conduction
The movement of heat, electricity, or sound from one object to another object
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Conductors of Heat
Conductors 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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Insulation
Not allowing heat, electricity, or sound to pass through easily
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Insulators of Heat
Insulators 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 Electricity
Materials 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 Electricity
Insulators 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