Identify Methods of Heat Transfer

Which of the following is an example of thermal energy transfer?

• Energy moving from the hot coils of a stove to a pan

• Wind moving the blades of a turbine

• Energy flowing through a power cord to a fan

• Water moving in a flowing river

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Thermal energy transfers heat from –

• Warm objects to cool objects

• Large objects to small objects

• Cool objects to warm objects

• Less dense objects to more dense objects

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Which of the following is an example of conduction?

• Warm and cold water circulating in an ocean

• Sunlight brightening a room early in the morning

• A ceramic mug becomes warmer after coffee is poured into it

• Hot air rising and cold air sinking on a coast line

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A student noticed that the saucer below the coffee cup became warmer after coffee was poured in the cup. Which type of heat transfer has occurred?

• Conduction

• Convection

• Radiation

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Currents developed as heat is transferred in liquids through the process of –

• Conduction

• Convection

• Radiation

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The diagram below shows how sea breezes form as warm air over the land rises and cool ocean air moves in. This movement of air is an example of –

• Conduction

• Convection

• Radiation

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While seated one meter away, a camper felt the warmth of the camp fire. Which type of energy transfer did the camper experience?

• Conduction

• Convection

• Radiation

All of the following are examples of heat transfer by radiation EXCEPT –

• Solar energy warming the earth

• Heat from the red hot coils of a stove

• A light bulb warming the surrounding air

• Heat moving from a clothes iron to the fabric as a shirt is ironed

Four steel blocks were heated to different temperatures and stacked together as shown in the diagram below. Heat energy will move in all of the following directions EXCEPT –

• From #4 to #1

• From #3 to #2

• From #2 to #4

• From #2 to #3

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Why does ice melt when placed in a room temperature container?

• Heat is transferred from the ice into the container.

• Heat moves from air and the container into the ice.

• The ice loses the energy needed to hold it together as a solid.

• Atoms of the water molecule come apart.

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