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# Composition and Structure of Atmosphere

Composition and Structure of Atmosphere is chapter 7 in Fundamentals of Physical Geography, a CBSE Class 11 book for the subject Geography on Edzy.

## Knowledge Snapshot

| Field | Details |
| :--- | :--- |
| Board | CBSE |
| Curriculum | CBSE |
| Class | Class 11 |
| Subject | Geography |
| Book | Fundamentals of Physical Geography |
| Chapter | Composition and Structure of Atmosphere |
| Chapter Number In Book | 7 |
| Chapter Slug | composition-and-structure-of-atmosphere |
| Pages | 64-65 |
| Page Count | 2 |
| Source PDF | https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/b7ed18e6-924d-4915-909f-440463191048.pdf |
| Last Updated | 2026-06-25 |

## Chapter Overview

This chapter discusses the composition and structure of the atmosphere, including the important role of air for living organisms, the proportions of gases, and the various layers that make up the atmosphere.

## Topic Inventory

| No. | Topic ID | Topic |
| :--- | :--- | :--- |
| 1 | 69abd2c7a243cecf9686bcfc | Introduction to Atmosphere |
| 2 | 69abd2c7a243cecf9686bcff | Composition of the Atmosphere |
| 3 | 69abd2c7a243cecf9686bd07 | Structure of the Atmosphere |

## Topic-Wise Extracted Content

### Introduction to Atmosphere

The atmosphere is essential for the survival of living organisms, as it provides life-giving gases like oxygen and carbon dioxide. It is a mixture of various gases that envelop the earth, with 99 percent of its mass confined to the first 32 kilometers from the surface.

### Composition of the Atmosphere

The atmosphere consists of gases, water vapor, and dust particles. Carbon dioxide, significant for its role in the greenhouse effect, and ozone, important for blocking harmful ultraviolet rays, are key components. Water vapor varies in volume depending on location and altitude, influencing climate and weather.

### Structure of the Atmosphere

The atmosphere has five layers, with varying density and temperature: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The troposphere is crucial for all weather and climate changes. The stratosphere contains the ozone layer, vital for absorbing UV radiation. The mesosphere cools with altitude, while the thermosphere and exosphere have distinct characteristics as one moves further from Earth.

## Chapter Summary

The chapter covers the essential elements of the atmosphere, its composition including various gases and dust particles, and the structure comprising the different layers of the atmosphere with specific roles and characteristics.

## Key Ideas

- The atmosphere is a mixture of gases essential for life on Earth.
- Carbon dioxide and ozone play critical roles in regulating temperature and protecting living organisms.
- The atmosphere is structured in layers, each with distinct properties affecting weather and climate.

## Important Chapter Facts

- The chapter is Composition and Structure of Atmosphere.
- The chapter number in the book is 7.
- The subject is Geography.
- The book is Fundamentals of Physical Geography.
- The class is Class 11.
- The source PDF is https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/b7ed18e6-924d-4915-909f-440463191048.pdf.
- The chapter covers pages 64-65.
- The chapter page count is 2.
- The topic list contains the supplied topic entries.

## Related OKF Entities

| Entity Type | Title | URL |
| :--- | :--- | :--- |
| Chapter Canonical Page | Composition and Structure of Atmosphere | https://www.edzy.ai/cbse-class-11-geography-fundamentals-of-physical-geography-composition-and-structure-of-atmosphere |
| Chapter Markdown | Composition and Structure of Atmosphere | https://www.edzy.ai/okf/chapter/cbse-class-11-geography-fundamentals-of-physical-geography-composition-and-structure-of-atmosphere.md |
| Source PDF | Composition and Structure of Atmosphere | https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/b7ed18e6-924d-4915-909f-440463191048.pdf |

## Source Attribution

| Field | Value |
| :--- | :--- |
| Source | Edzy |
| Reference Type | examSubjectBookChapter |
| Reference ID | 66f153bbe361cd99fe369873 |
| Chapter ID | 66f153bbe361cd99fe369873 |
| Canonical URL | https://www.edzy.ai/cbse-class-11-geography-fundamentals-of-physical-geography-composition-and-structure-of-atmosphere |
| Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-11-geography-fundamentals-of-physical-geography-composition-and-structure-of-atmosphere.md |
| Source PDF | https://edzy-ai.s3.ap-south-1.amazonaws.com/edzy-express-ts/b7ed18e6-924d-4915-909f-440463191048.pdf |
| Last Updated | 2026-06-25 |