Heat Energy Transfer

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What are the three methods of heat transfer?
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Conduction, convection, and radiation.
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How does conduction transfer heat?
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Conduction transfers heat through direct contact between molecules in a solid.
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What is an example of convection?
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Boiling water, where heat is transferred by the movement of liquid.
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How does radiation differ from conduction and convection?
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Radiation transfers heat through electromagnetic waves, not requiring a medium.
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What is an insulator?
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A material that slows down or prevents the transfer of heat.
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Give an example of a good conductor of heat.
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Metal, such as copper.
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Why do metal handles on pots get hot?
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Due to conduction, where heat travels from the pot to the handle.
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What role does convection play in heating a room?
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Heated air rises and cooler air sinks, circulating warmth throughout the room.
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What is thermal equilibrium?
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A state where two objects at different temperatures reach the same temperature.
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Why does a black object heat up faster in the sun than a white object?
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Black surfaces absorb more radiation than white surfaces.
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How do greenhouses use heat transfer principles to stay warm?
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They trap heat through the glass, allowing radiation in but preventing convection out.
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How does double glazing reduce heat loss?
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It traps a layer of air between two glass panes, reducing conduction and convection.
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What household item utilizes radiation to keep food warm?
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A microwave oven.
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Why do woolen clothes keep you warm in winter?
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Wool fibers trap air, reducing heat loss through convection and conduction.
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What is thermal conductivity?
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It measures a material's ability to conduct heat.
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