Thermal Energy Review

What is heat?

• A hot object

• The random motion of molecules within a substance

• The movement of thermal energy from a substance at HIGHER temperature to a substance at a LOWER temperature

• The movement of thermal energy from a substance at a LOWER temperature to a substance at a HIGHER temperature

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Which of these substances would transfer heat through convection? (SELECT ALL THAT APPLY)

• Aluminum

• Air

• Steel

• Outer Space

• Water

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Which image shows the higher temperature?

• A

• B

• Neither

• Both

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Which image shows the lower temperature?

• A

• B

• Neither

• Both

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What type of heat transfer happens when heat is transferred through invisible electromagnetic rays?

• Convection

• Radiation

• Conduction

• Elastic

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What type of heat transfer happens when heat is transferred through a liquid or a gas?

• Convection

• Radiation

• Conduction

• Elastic

This is an example of a(n)

• conductor of heat

• insulator of heat

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Why does a metal lawn chair get hot in the sun when the grass sitting in the same sunlight remains cool to the touch?

• Heat travels easily through plants but not metals.

• Heat travels easily through both plants and metals.

• Heat travels easily through metal objects but not through plants.

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Which type of heat transfer is shown?

• convection

• conduction

• radiation

• stir frying

Which type of heat transfer is shown?

• convection

• conduction

• radiation

• hot air balloon

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