Thermal Energy Transfer

Introduction
 

Thermal energy is transferred whenever there is a temperature difference between two objects or regions. Heat always flows from a hotter object to a colder one until thermal equilibrium is reached. In this topic, students learn the three mechanisms of thermal energy transfer—conduction, convection and radiation—and how they are applied in everyday situations and engineering.
 

AQA A Level Physics Specification: 3.9.2 Thermal Energy Transfer
 

What You Need to Know
 

• State that thermal energy is transferred from hotter regions to colder regions.

• Describe the process of thermal conduction in solids.

• Explain thermal conduction in terms of vibrating particles and free electrons in metals.

• Describe how convection transfers thermal energy in liquids and gases.

• Explain how differences in density produce convection currents.

• Describe thermal radiation as the transfer of energy by electromagnetic waves.

• Compare conduction, convection and radiation as methods of thermal energy transfer.

• Apply your understanding of thermal energy transfer to practical situations and exam questions.
   

Downloadable Topic Pack
 

Thermal Energy Transfer Topic Pack Exam Questions and Answers
 

This downloadable resource contains carefully selected AQA A Level Physics exam questions covering conduction, convection, thermal radiation and practical applications of heat transfer, together with fully worked solutions designed to strengthen understanding and improve exam performance.
 

Related Topics
 

• Kinetic Theory

• Internal Energy

• Specific Heat Capacity

• Black Body Radiation

• Stefan-Boltzmann Law