Identify the Described Heat-Transfer Mechanism - Practice 2

Conduction transfers energy through interactions in material without bulk flow.

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Conduction transfers energy through interactions in material without bulk flow. Convection involves moving fluid. Thermal radiation travels as electromagnetic waves and can cross a vacuum. Real situations can include several mechanisms; identify the stated one.

Worked example

A model says warm water carries energy as it circulates: convection. A Sun-to-Earth path across space illustrates radiation.

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An oxygen molecule, O2, contains two atoms but only one kind of element. Counting atoms and counting elements answer different questions.

Question 1 Sunlight carries energy through space to Earth. Which mechanism is described? conduction through air all the way radiation convection

Question 2 A paper model describes energy passing through a stationary spoon. Which mechanism is described? conduction convection bulk water flow

Question 3 A fluid loop carries warmer liquid upward and cooler liquid downward. Which mechanism is described? radiation only no transfer convection

Question 4 An infrared wave carries energy across a vacuum. Which mechanism is described? conduction through particles radiation convection

Question 5 A stationary solid transfers energy between neighboring particles. Which mechanism is described? conduction convection bulk gas flow

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