8.2. Thermal Energy Transfer
Here we look into some of the Physics of thermal energy transfer. We start with a bit of recap on the 3 main methods - conduction, convection, radiation. However, the main focus of this chapter is building up a bit of understanding about the reasons behind the greenhouse effect - starting with energy emission from the sun through something called black body radiation, followed by looking at energy absorption of the Earth and the reason why greenhouse gases contribute to global temperature changes.
The section has been divided up as follows:
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Conduction, Convection and Radiation - recapping the 3 main methods of thermal transfer
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Black Body Radiation - the normal thermal radiation emitted by all warm objects
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The Solar Constant - how energy transfers through the solar system
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The Earth and Greenhouse Effect - how exactly do greenhouse gases contribute to global warming?
Conduction, Convection, Radiation
We looked at these methods of heat transfer initially at GCSE. Actually, for the IB, it does not go too far beyond the GCSE content you should already be familiar with.
Conduction is the method of heat transfer due to transfer of thermal energy through molecular collisions.
Convection only occurs in fluids (i.e. liquids and gases). Warmer regions result in lower densities
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Video Lessons
Chris Doner | Climate Concepts (CC&R) | IB Specific | ||||
Khan Academy | Conduction, Convection, Radiation | Thermal Conduction |
Resources
IB Physics | Topic 8 Notes | |||||
IB-Physics.net | Chapter 8 Summary | IB Revision Notes | ||||
Mr. G | 8.2 Teaching Notes | 8.2 Student Notes |
Questions
Cambridge University Press | Topic 8: MCQs | CUP Website Link | Freely available online | |||
Grade Gorilla | 8.2 (Energy Transfer) MCQ | Topic 8 (Energy Production) End Quiz | Quick IB Specific Mixed MCQs | |||
Mr. G | 8.2 Formative Assessment | Topic 8 Summary Qs | IB Specific Questions |
Black Body Radiation
Video Lessons
Chris Doner | Climate Concepts (Black Bodies) | IB Specific | ||||
Study Nova | Black Bodies | Examples 1 | Examples 2 | Examples 3 |
Resources
IB Physics | Topic 8 Notes | |||||
IB-Physics.net | Chapter 8 Summary | IB Revision Notes | ||||
Mr. G | 8.2 Teaching Notes | 8.2 Student Notes |
Questions
Cambridge University Press | Topic 8: MCQs | CUP Website Link | Freely available online | |||
Grade Gorilla | 8.2 (Energy Transfer) MCQ | Topic 8 (Energy Production) End Quiz | Quick IB Specific Mixed MCQs | |||
Mr. G | 8.2 Formative Assessment | Topic 8 Summary Qs | IB Specific Questions |
The Solar Constant
Video Lessons
Chris Doner | Climate Concepts (Solar Constant) | IB Specific |
Resources
IB Physics | Topic 8 Notes | |||||
IB-Physics.net | Chapter 8 Summary | IB Revision Notes | ||||
Isaac Physics | Inverse Square Laws Maths | |||||
Mr. G | 8.2 Teaching Notes | 8.2 Student Notes |
Questions
Cambridge University Press | Topic 8: MCQs | CUP Website Link | Freely available online | |||
Grade Gorilla | 8.2 (Energy Transfer) MCQ | Topic 8 (Energy Production) End Quiz | Quick IB Specific Mixed MCQs | |||
Mr. G | 8.2 Formative Assessment | Topic 8 Summary Qs | IB Specific Questions |
The Earth and Greenhouse Effect
Video Lessons
Chris Doner | Energy Balance | Greenhouse Effect | IB Specific | |||
Gradepod | Albedo | IB Specific | ||||
Study Nova | Albedo |
Resources
IB Physics | Topic 8 Notes | |||||
IB-Physics.net | Chapter 8 Summary | IB Revision Notes | ||||
Mr. G | 8.2 Teaching Notes | 8.2 Student Notes |
Questions
Cambridge University Press | Topic 8: MCQs | CUP Website Link | Freely available online | |||
Grade Gorilla | 8.2 (Energy Transfer) MCQ | Topic 8 (Energy Production) End Quiz | Quick IB Specific Mixed MCQs | |||
Mr. G | 8.2 Formative Assessment | Topic 8 Summary Qs | IB Specific Questions |
Additional Resources
IB Questions
A question by question breakdown of the IB papers by year is shown below to allow you to filter questions by topic. Hopefully you have access to many of these papers through your school system. If available, there may be some links to online sources of questions, though please be patient if the links are broken! (DrR: If you do find some broken links, please contact me through the site)
Questions on this topic (Section 8) are shown in grey.
Use this grid to practice past IB questions topic by topic. You can see from the colours how similar the question topic breakdown is year by year. The more you can familiarise yourself with the IB question style the better - eventually you will come to spot those tricks and types of questions that reappear each year.