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Composition & structure of atmosphere

Telangana Open School (TOSS) · Class 12 · Geography

Quick revision notes for Composition & structure of atmosphere — Telangana Open School (TOSS) Class 12 Geography. Key concepts, formulas, and definitions for last-minute revision.

52 questions30 flashcards3 concepts

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Key Topics to Revise

1

Composition of the Atmosphere

  • The atmosphere consists of gases, water vapour, and solid particles like dust.
  • Gases are divided into permanent gases (constant proportion) and variable gases (changing concentration).
  • Nitrogen (78%) and Oxygen (21%) are the most abundant gases.
2

Structure of the Atmosphere

  • The atmosphere is divided into five layers: Troposphere, Stratosphere, Mesosphere, Ionosphere, and Exosphere.
  • Troposphere is the lowest layer (up to 12 km) where all weather occurs; temperature decreases with height.
  • Stratosphere extends up to 50 km and contains the ozone layer; temperature increases due to ozone absorption of UV rays.

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Full Notes

Key Concepts

The atmosphere consists of permanent gasesThe atmosphere is divided into fiveGases like carbon dioxide

Frequently Asked Questions

What are the important topics in Composition & structure of atmosphere for Telangana Open School (TOSS) Class 12 Geography?
Composition & structure of atmosphere covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Composition & structure of atmosphere — Telangana Open School (TOSS) Class 12 Geography?
Understand the core concepts first, then work through the 52 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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