Heat Transfer: Conduction, Convection, & Radiation

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What is conduction?

Back

Conduction is the transfer of heat through a solid material without the movement of the material itself. It occurs when two objects at different temperatures are in direct contact.

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What is convection?

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Convection is the transfer of heat through fluids (liquids and gases) caused by the movement of the fluid itself. Warmer, less dense fluid rises while cooler, denser fluid sinks.

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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. It does not require a medium and can occur in a vacuum.

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What is thermal energy?

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Thermal energy is the total kinetic energy of the particles in a substance, which is related to its temperature.

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What happens to air particles when heated?

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When air particles are heated, they gain energy, move faster, and spread apart, causing the air to become less dense.

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What is an example of conduction?

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An example of conduction is when a metal spoon is placed in a hot pot of soup, and the heat from the soup transfers to the spoon.

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What is an example of convection?

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An example of convection is the rolling motion of boiling water, where hot water rises and cooler water sinks.

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What is an example of radiation?

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An example of radiation is feeling the warmth of the sun on your skin, even when you are not in direct contact with it.

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What is the difference between heat and temperature?

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Heat is the transfer of thermal energy, while temperature is a measure of the average kinetic energy of the particles in a substance.

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What is insulation?

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Insulation is a material that reduces the transfer of heat, helping to keep heat in or out of a space.