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Revision Notes
Composition & structure of atmosphere — Revision Notes
Telangana Open School (TOSS) · Class 12 · Geography
Composition & structure of atmosphere revision notes for Telangana Open School (TOSS) Class 12 Geography: 2 topics in quick points.
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 NotesKey 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?
Key topics in Composition & structure of atmosphere include Composition of the Atmosphere, Structure of the Atmosphere. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise Composition & structure of atmosphere for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 52 practice questions on Composition & 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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