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Atmosphere

Gujarat Board · Class 11 · Geography

Quick revision notes for Atmosphere — Gujarat Board Class 11 Geography. Key concepts, formulas, and definitions for last-minute revision.

45 questions24 flashcards5 concepts

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Key Topics to Revise

1

Composition of Atmosphere

  • Atmosphere contains solid, liquid, and gaseous components including microscopic particles, salt particles, water droplets, and various gases
  • Nitrogen (78%) is the most abundant gas, followed by Oxygen (21%), Argon (0.93%), and Carbon dioxide (0.03%)
  • Carbon dioxide is the heaviest gas, concentrated up to 20 km height
2

Structure of Atmosphere

  • Atmosphere divided into 4 layers based on temperature variations: Troposphere, Stratosphere, Mesosphere, Thermosphere
  • Troposphere: 0-16 km (tropics), 0-12 km (temperate), 0-8 km (polar); contains 75% atmospheric gases
  • Temperature decreases by 6.5°C per km height in troposphere
3

Weather and Climate

  • Weather: short-term atmospheric conditions (morning, noon, evening, day)
  • Climate: average weather conditions over 35+ years
  • Weather depends on temperature, humidity, rainfall, air pressure, fog, cloud cover
4

Factors Affecting Climate

  • Latitude: Most important factor - equatorial regions hot & humid, polar regions cold & dry
  • Altitude: Temperature decreases by 6.5°C per km height; hill stations have pleasant climate
  • Distance from sea: Coastal areas moderate climate, continental areas extreme climate

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Full Notes

Key Concepts

The atmosphere consists of 78% NitrogenThe atmosphere has four main layersWeather refers to shortSeven main factors affect climateGlobal warming is the increase

Frequently Asked Questions

What are the important topics in Atmosphere for Gujarat Board Class 11 Geography?
Atmosphere covers several key topics that are frequently asked in Gujarat Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Atmosphere — Gujarat Board Class 11 Geography?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and 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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