Question Video: Determining Heat Transfer Method | Nagwa Question Video: Determining Heat Transfer Method | Nagwa

# Question Video: Determining Heat Transfer Method Science • First Year of Preparatory School

Fill in the blank: Thermal energy is transferred from the higher temperature end to the lower temperature end of a solid rod. This is an example of heat ＿. [A] convection [B] conduction [C] radiation

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### Video Transcript

Fill in the blank. Thermal energy is transferred from the higher temperature end to the lower temperature end of a solid rod. This is an example of heat blank. (A) Convection, (B) conduction, (C) radiation.

In this example, we have an object where one end is at a high temperature and the other is at a low temperature. We’re told that thermal energy is transferred from the higher temperature end to the other one. We want to know what kind of heat transfer is this. One important clue is that our object is solid. That is, it’s not a liquid, and it’s not a gas. The way that thermal energy is transferred across solid objects is by the process called conduction.

Convection, option (A), is for liquids and gases, while radiation applies when two objects exchange thermal energy but aren’t in contact. Since we have a solid rod and thermal energy is moving across it, this is an example of heat conduction.

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