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Revision Notes
Air and Atmosphere — Revision Notes
ICSE · Class 6 · Chemistry
Air and Atmosphere revision notes for ICSE Class 6 Chemistry: 4 topics in quick points. Part of the ICSE Class 6 Chemistry syllabus.
55 questions30 flashcards4 concepts
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Key Topics to Revise
1
Presence and Properties of Air
- Air is present everywhere — on land, in water, and in the atmosphere.
- Air is colourless, odourless, tasteless, and transparent.
- Air occupies space and has mass.
2
Composition of Air
- Air is a mixture of gases: 78% nitrogen, 21% oxygen, 0.03–0.04% carbon dioxide, and 0.9% inert gases.
- Water vapour, dust particles, and pollutants are also present in varying amounts.
- Oxygen supports burning and respiration; nitrogen dilutes oxygen and prevents rapid burning.
3
Uses of Air Components
- Oxygen: Used for respiration and burning (combustion).
- Nitrogen: Used to make proteins in plants, in fertilizers, and for food packaging.
- Carbon dioxide: Used in photosynthesis, fire extinguishers, and fizzy drinks.
4
Balance of Gases and Natural Processes
- Respiration and burning use oxygen and release carbon dioxide.
- Photosynthesis in plants uses CO₂ and releases oxygen, balancing the gases.
- Photosynthesis occurs only in green plants during daytime using sunlight and chlorophyll.
Get complete notes with diagrams and examples
Full NotesKey Concepts
Air is a mixture of gasesOxygen is essential for respirationGreen plants take in carbon dioxideAir pollution occurs when harmful substances
Frequently Asked Questions
What are the important topics in Air and Atmosphere for ICSE Class 6 Chemistry?
Key topics in Air and Atmosphere include Presence and Properties of Air, Composition of Air, Uses of Air Components, Balance of Gases and Natural Processes. Study these first, then practise questions on each for Class 6 exams.
How should I revise Air and Atmosphere for Class 6 exams?
Learn the core ideas first, then work through the 55 practice questions on Air and 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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