Chapter 9 of 17
Revision Notes
Temperature — Revision Notes
Gujarat Board · Class 11 · Geography
Temperature revision notes for Gujarat Board Class 11 Geography: 4 topics in quick points. Part of the Gujarat Board Class 11 Geography syllabus.
44 questions20 flashcards5 concepts
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Key Topics to Revise
1
Solar Radiation and Insolation
- Sun is the primary source of heat energy for Earth, located approximately 15 crore km away
- Nuclear fusion of hydrogen nuclei in Sun's core releases tremendous energy
- Sun's surface temperature: 6000°C, Central temperature: 1.5 crore°C
2
Factors Affecting Distribution of Insolation
- Angular length of Sun's rays: Vertical rays in tropics receive more heat, slanting rays in polar regions receive less
- Length of day: Longer days receive more insolation (summer > winter)
- Density of atmosphere and height: 40-50% insolation absorbed in atmosphere, thin atmosphere absorbs less
3
Heat Budget of Earth
- 18% insolation directly absorbed by atmosphere
- 47% insolation reaches and absorbed by Earth's surface
- 35% insolation reflected back as Albedo
4
Factors Affecting Temperature
- Latitude: Temperature decreases from equator to poles due to angular difference of Sun's rays
- Height above sea level: Temperature decreases with altitude (lapse rate 6.5°C/1000m)
- Distance from sea: Coastal areas moderate, continental areas extreme temperatures
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Full NotesKey Concepts
Solar radiation is the heatFive key factors influence insolation distributionOf total solar energy reaching Earth'sTemperature is the measure of atmosphericA phenomenon where temperature increases
Frequently Asked Questions
What are the important topics in Temperature for Gujarat Board Class 11 Geography?
Key topics in Temperature include Solar Radiation and Insolation, Factors Affecting Distribution of Insolation, Heat Budget of Earth, Factors Affecting Temperature. Study these first, then practise questions on each for Class 11 exams.
How should I revise Temperature for Class 11 exams?
Learn the core ideas first, then work through the 44 practice questions on Temperature. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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