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Composition and Structure of Atmosphere — Revision Notes

CBSE · Class 11 · Geography

Composition and Structure of Atmosphere revision notes for CBSE Class 11 Geography: 3 topics in quick points. Part of the CBSE Class 11 Geography syllabus.

76 questions70 flashcards5 concepts

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Key Topics to Revise

1

1. Composition of the Atmosphere

  • The atmosphere is made up of gases, water vapour, and dust particles.
  • 99 per cent of the total mass of the atmosphere is confined to the height of 32 km from the earth's surface.
  • The proportion of gases changes in the higher layers of the atmosphere.
2

2. Structure of the Atmosphere

  • The atmosphere has different layers with varying density and temperature.
  • Density is highest near the surface of the earth and decreases with increasing altitude.
  • The atmosphere is divided into five layers depending upon temperature condition: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
3

3. Elements of Weather and Climate

  • The main elements of weather and climate are temperature, pressure, winds, humidity, clouds, and precipitation.
  • These elements influence human life on earth.
  • Weather and climate changes occur mainly in the troposphere.

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Full Notes

Key Concepts

The atmosphere is a mixtureThe atmosphere is made upCarbon dioxide is transparent to incomingWater vapour is a variable gasDust particles include sea salts

Frequently Asked Questions

What are the important topics in Composition and Structure of Atmosphere for CBSE Class 11 Geography?
Key topics in Composition and Structure of Atmosphere include Composition of the Atmosphere, Structure of the Atmosphere, Elements of Weather and Climate. Study these first, then practise questions on each for Class 11 exams.
How should I revise Composition and Structure of Atmosphere for Class 11 exams?
Learn the core ideas first, then work through the 76 practice questions on Composition and Structure of Atmosphere. 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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