Radiation Convection and Conduction

• Conduction

• Convection

• Radiation

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• Conduction

• Convection

• Radiation

During convection, more dense currents _________ and less dense currents _________.

• sink, rise

• rise, sink

Heat transfer by conduction occurs when...

• particles bump into each other

• large numbers of atoms move from place to place

• atoms give off heat in the form of electromagnetic waves

• electromagnetic waves travel from place to place through a vacuum

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Radiation is heat transferring ____

• in a circular motion

• by touching

• by waves

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Why does a black t shirt in the sun heat up more than a white t shirt in the sun?

• The white t shirt absorbs all of the colors of light waves. The black t shirt reflects all of the colors of light.

• The white t shirt reflects all of the colors of light waves. The black t shirt absorbs all of the colors of light.

• Black shirts are better conductors of heat.

• White shirts are better insulators of heat.

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Which material is the best conductor of heat?

• Wood

• Plastic

• Glass

• Steel

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Objects that allow heat to change are called...

• Thermal Equilibrium

• Thermal Conductors

• Thermal Energy

• Thermal insulators

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True or false: two objects must be touching in order for radiation to occur

• True

• False

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A group of friends gather around a fire to stay warm. This is an example of ________.

• conduction

• convection

• radiation