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# 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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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

## 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