Heat Transfer Answers
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fluidswaveselectricitycharges
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fluidsB
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Which two conditions must exist in order for radiation to occur?
A
the presence of a solid, liquid, or gas and a temperature differenceB
direct contact of molecules and the presence of a solid, liquid, or gasC
the presence of electromagnetic waves and direct contact of moleculesD
a temperature difference and the presence of electromagnetic waves3
Radiation occurs when energy is transferred by electromagnetic waves.
Answer not available
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transferredchangedcreatedmeasured
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transferredB
changedC
createdD
measured5
Selma made a diagram to compare convection and radiation.
A
Must involve temperature differences between substances or objectsB
Only occurs when molecules are in direct contactC
Involves the movement of fluids based on density differencesD
Can occur where there is little or no matter6
Which condition must exist in order for conduction to occur between two substances?
A
The molecules of the substances must be touching.B
Both substances must be the same temperature.C
At least one substance must be a liquid.D
Most of the molecules must be slow moving.7
The diagram shows an example of convection.
A
Warmer water sinksB
Warmer water risesC
Cooler water sinksD
Cooler water rises8
wavesmoleculesliquidsfluids
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wavesB
moleculesC
liquidsD
fluids9
Which is an example of convection?
A
In a mountain forest, the sun heats up the ground.B
On a hot day, Amaya pours water on her face to cool off.C
At the beach, Stephan’s feet get hot walking across the sand.D
Above the sea, warm air rises, cools, and sinks.10
Which best describes a wave?
A
a collision of particlesB
a disturbance that carries energyC
a movement of fluidsD
a group of electrically charged moleculesDid you find these answers helpful?
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