Conduction, Convection & Radiation

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What is conduction?

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Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids where heat is transferred through direct contact between particles.

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NGSS.MS-PS3-3

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What is convection?

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Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density, resulting in the circulation of the fluid.

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NGSS.MS-ESS2-6

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What is radiation?

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Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, which can occur in a vacuum and does not require a medium.

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How does heat transfer occur in a metal spoon placed in hot soup?

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Heat transfer occurs through conduction, where heat moves from the hot soup to the cooler metal spoon, warming it up.

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What is an example of convection in everyday life?

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An example of convection is the circulation of warm and cool air in a house, where warm air rises and cool air sinks, creating a convection current.

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NGSS.MS-ESS2-6

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What materials are good conductors of heat?

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Good conductors of heat include metals such as copper, aluminum, and silver, which allow heat to flow easily through them.

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What is the role of a conductor in an electrical circuit?

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A conductor allows electric current to flow through it, completing the circuit and enabling the operation of electrical devices.

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How does boiling water demonstrate convection?

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When boiling water, heat from the stove warms the water at the bottom, causing it to rise while cooler water descends, creating a convection current.

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What happens to the temperature of a substance during conduction?

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During conduction, the temperature of the substance increases as heat is transferred from a hotter object to a cooler one.

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What is the difference between conduction and convection?

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Conduction is heat transfer through direct contact in solids, while convection is heat transfer through the movement of fluids.

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