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Revision Notes

Atmospheric Pressure and Winds — Revision Notes

ICSE · Class 11 · Geography

Atmospheric Pressure and Winds revision notes for ICSE Class 11 Geography: 4 topics in quick points. Part of the ICSE Class 11 Geography syllabus.

65 questions46 flashcards4 formulas & key relations5 concepts

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Key Topics to Revise

1

Atmospheric Pressure: Meaning, Measurement, and Importance

  • Atmospheric pressure is the pressure exerted by the atmosphere on the earth’s surface.
  • Air has weight, so it presses on the surface below it.
  • Atmospheric pressure is measured with a barometer.
2

Factors Affecting Atmospheric Pressure

  • Temperature and pressure are inversely related: when temperature rises, air expands, becomes lighter, and pressure falls.
  • When temperature falls, air contracts, becomes denser, and pressure rises.
  • Altitude reduces pressure because air is compressed more in lower layers than in upper layers.
3

Global Pressure Belts and Their Seasonal Shift

  • There are seven pressure belts over the globe.
  • Equatorial low pressure belt extends up to 10°N and S of the equator.
  • Sub-tropical high pressure belts extend from near the tropics to about 35°N and S.
4

Winds and Their Controlling Factors

  • Wind is the horizontal movement of air.
  • Air current is the vertical or nearly vertical movement of air.
  • Wind moves from high pressure to low pressure.

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Full Notes

Key Concepts

Atmospheric pressure is the pressure exertedAn isobar is an imaginary lineTemperatureThere are seven pressure beltsCoriolis force is the deflecting force

Frequently Asked Questions

What are the important topics in Atmospheric Pressure and Winds for ICSE Class 11 Geography?
Key topics in Atmospheric Pressure and Winds include Atmospheric Pressure: Meaning, Measurement, and Importance, Factors Affecting Atmospheric Pressure, Global Pressure Belts and Their Seasonal Shift, Winds and Their Controlling Factors. Study these first, then practise questions on each for Class 11 exams.
How should I revise Atmospheric Pressure and Winds for Class 11 exams?
Learn the core ideas first, then work through the 65 practice questions on Atmospheric Pressure and 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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