Thermal Energy Transfer

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• When heat transfers from objects that are touching.
• When heat transfers through the heater or AC in your house.

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What type of heat transfer takes place when you touch a warm mug of hot chocolate?

• Radiation

• Convection

• Conduction

• None of the above

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Conduction requires

• Electricity

• the electromagnetic spectrum and particles

• air or water flow

• direct contact

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Heat transfer always moves ...

• cold to hot

• east to west

• hot to cold

• north to south

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If you walk barefoot on hot asphalt, energy is transferred by which process?

• Convection

• Radiation

• Conduction

• Reflection

Energy is transferred as heat between two objects of ___________ temperatures.

• differing

• same

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Which direction is heat flowing in the picture?

• from the hand to the ice
• from the ice to the hand
• heat is not being transferred
• there is no way to tell

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The earth receives heat energy from the sun by _______________, which is the transfer of energy as electromagnetic waves?

• radiation
• convection
• conduction
• greenhouse effect

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Heating a room with a fireplace

• Conduction

• Convection

• Radiation

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Which is the best surface for reflecting heat radiation?

• Shiny white

• Dull white

• Shiny black

• Dull black