Exercise-wise Solutions for Chapter 7: Composition and Structure of Atmosphere
FAQs on NCERT Solutions For Class 11 Geography Chapter 7 Composition and Structure of Atmosphere - 2025-26
1. What is the composition of the atmosphere according to NCERT Solutions for Class 11 Geography Chapter 7?
The atmosphere is mainly composed of nitrogen (78%), oxygen (21%), and other gases like argon, carbon dioxide, neon, helium, ozone, hydrogen, and water vapour in small amounts. These proportions are crucial for maintaining life and influencing Earth's climate. Key points:
- Nitrogen stabilises the atmosphere.
- Oxygen is vital for respiration.
- Carbon dioxide aids in photosynthesis and regulates Earth's temperature.
- Trace gases contribute to weather and climate.
2. Why is understanding the structure of the atmosphere important for Class 11 Geography?
Understanding the structure of the atmosphere is essential as it helps you learn how different atmospheric layers affect weather, climate, and life on Earth. The vertical structure includes:
- Troposphere – closest to Earth, most weather phenomena occur here.
- Stratosphere – contains ozone layer.
- Mesosphere – meteors burn in this layer.
- Thermosphere – high temperature, auroras occur.
- Exosphere – outermost layer, merges with space.
3. How can I write stepwise NCERT answers for full marks in Geography exams?
To score full marks in NCERT Solutions for Class 11 Geography Chapter 7, follow these strategies:
- Begin answers with clear definitions or introductory sentences.
- Write in points or steps for clarity and presentation.
- Include diagrams or labeled maps when asked (use pencil, neat labels).
- Use key terms like composition of atmosphere, structure of atmosphere, and name important gases or layers.
- Conclude with brief summaries when required.
4. Which diagrams are important for Chapter 7: Composition and Structure of Atmosphere?
Important diagrams for this chapter include:
- Vertical structure of the atmosphere (label all layers: Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere).
- Pie chart showing composition of gases.
- Map showing ozone distribution (if asked).
Neat diagrams with proper labeling can fetch easy marks in exams.
5. Where can I download the NCERT Solutions PDF for Composition and Structure of Atmosphere (Class 11 Geography)?
You can download the free PDF of NCERT Solutions for Class 11 Geography Chapter 7: Composition and Structure of Atmosphere from trusted educational platforms and official sites. Steps:
- Visit the platform's Class 11 Geography NCERT Solutions section.
- Select Chapter 7 on Composition and Structure of Atmosphere.
- Click the 'Download PDF' button for offline revision.
6. Are definitions and diagrams mandatory in Geography answers for CBSE exams?
Yes, including precise definitions and well-drawn diagrams is strongly recommended in CBSE exams as these boost clarity and help meet marking scheme requirements. Points to consider:
- Write textbook-based definitions using key terms.
- Draw diagrams where specified, label neatly.
- Use diagrams/maps even when not mandatory if it supports your answer.
7. What are the most important topics and questions from Composition and Structure of Atmosphere for 2025–26 exams?
Key topics from Class 11 Geography Chapter 7 (CBSE 2025–26) include:
- Various gases in the atmosphere and their functions.
- Structure and characteristics of atmospheric layers.
- Role of ozone and greenhouse gases.
- Map/diagram labelling questions.
- Short notes on atmospheric composition, questions on layers and their significance.
8. How does mastering NCERT Solutions for Class 11 Geography Chapter 7 help improve exam scores?
Mastering NCERT Solutions for this chapter boosts exam performance by:
- Ensuring stepwise, syllabus-aligned answers for all expected questions.
- Reducing errors through clear, concept-based revision.
- Building speed and accuracy in writing long answers with required points and diagrams.
- Familiarising students with CBSE marking scheme and answer structure.
9. Are sample questions and MCQs available for Chapter 7: Composition and Structure of Atmosphere?
Yes, you can find sample questions, MCQs, and important questions for this chapter on educational websites that align with the CBSE syllabus. These resources include:
- Objective-type MCQs for quick revision.
- Long answer, short answer, and value-based sample questions.
- Answers based on NCERT textbook step patterns.
10. Do examiners award partial marks for correct steps even if the final answer is wrong?
Yes, CBSE often follows a step-marking scheme, so you can get partial marks if your approach or intermediate steps are correct, even if the final answer is incorrect. Tips:
- Show all calculations and working steps clearly.
- Write logical explanations for each point.
- Avoid skipping major steps in long answers.
11. How can I quickly revise Chapter 7: Composition and Structure of Atmosphere before the exam?
For rapid revision of NCERT Solutions for Class 11 Geography Chapter 7:
- Use summary notes and flashcards for key gases, layers, definitions.
- Practice key diagrams and map labelling.
- Attempt worksheet and sample MCQs for self-check.
- Read stepwise solutions for all exercises.
12. Is referencing textbook page numbers useful during revision for Class 11 Geography?
Referencing textbook page numbers is helpful for quick look-up and verifying answers during revision. Benefits include:
- Ease in locating diagrams, definitions, and main answers.
- Cross-verifying notes with NCERT textbook content.
- Saving time just before exams.
