Heat Transfer Conduction Convection Radiation.

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Presentation transcript:

Heat Transfer Conduction Convection Radiation

Heat Movement Key Question: How does heat pass through different materials?

Heat Transfer The science of how heat flows is called heat transfer. There are three ways heat transfer works: conduction, convection, and radiation.

Conduction – Foldable definition Conduction is the transfer of heat through materials by the direct contact of matter. Dense metals like copper and aluminum are very good thermal conductors. Conduction= touch

Convection Key Question: Can moving matter carry thermal energy?

26.2 Convection Convection is the transfer of heat by the motion of liquids and gases. Convection in a gas occurs because gas expands when heated. Convection occurs because currents flow when hot gas rises and cool gas sink.

Foldable Definition

Radiation Key Question: How does heat from the sun get to Earth?

Radiation Radiation is heat transfer by waves. Thermal radiation is electromagnetic waves (including light) produced by objects because of their temperature. The higher the temperature of an object, the more thermal radiation it gives off.

Foldable Definition