Chapter 10 of 17
Revision Notes
Winds — Revision Notes
Gujarat Board · Class 11 · Geography
Winds revision notes for Gujarat Board Class 11 Geography: 4 topics in quick points. Part of the Gujarat Board Class 11 Geography syllabus.
43 questions20 flashcards5 concepts
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Key Topics to Revise
1
Atmospheric Pressure
- Atmosphere is the sphere of air spread over thousands of kilometres above Earth's surface
- Air has weight and exerts pressure on Earth's surface due to gravitational force
- Standard atmospheric pressure at mean sea level: 76 cm = 30 inches = 1013 millibars
2
Factors Affecting Atmospheric Pressure
- Three main factors: Altitude, Temperature, and Humidity
- Higher altitude = Lower pressure (air becomes thinner)
- Higher temperature = Lower pressure (air expands and becomes lighter)
3
Pressure Belts
- Seven pressure belts exist on Earth's surface
- Belts are arranged latitudinally with alternating high and low pressure
- Northern Hemisphere: Polar High (80°-90°N), Sub-polar Low (60°-70°N), Tropical High (20°-30°N)
4
Types of Winds - Permanent Winds
- Also called Planetary Winds - blow consistently from same direction
- Three types: Trade Winds (Easterlies), Westerlies, and Polar Winds
- Trade Winds: Blow from Tropical High to Equatorial Low (NE in NH, SE in SH)
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Full NotesKey Concepts
The weight of air inSeven distinct zones of highPermanent winds blowing from Tropical HighSeasonal winds that change direction basedWinds that blow over limited areas
Frequently Asked Questions
What are the important topics in Winds for Gujarat Board Class 11 Geography?
Key topics in Winds include Atmospheric Pressure, Factors Affecting Atmospheric Pressure, Pressure Belts, Types of Winds - Permanent Winds. Study these first, then practise questions on each for Class 11 exams.
How should I revise Winds for Class 11 exams?
Learn the core ideas first, then work through the 43 practice questions on Winds. 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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