NCERT Solutions Class 11 Geography Chapter 8 Composition and Structure of Atmosphere

NCERT Solutions Class 11 Geography Chapter 8 Composition and Structure of Atmosphere have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 11 Geography have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 11 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 11 Geography are an important part of exams for Class 11 Geography and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 11 Geography and also download more latest study material for all subjects. Chapter 8 Composition and Structure of Atmosphere is an important topic in Class 11, please refer to answers provided below to help you score better in exams

Chapter 8 Composition and Structure of Atmosphere Class 11 Geography NCERT Solutions

Class 11 Geography students should refer to the following NCERT questions with answers for Chapter 8 Composition and Structure of Atmosphere in Class 11. These NCERT Solutions with answers for Class 11 Geography will come in exams and help you to score good marks

Chapter 8 Composition and Structure of Atmosphere NCERT Solutions Class 11 Geography

 

NCERT Solution for Class 11 Geography for chapter 8 Composition and Structure of Atmosphere

1. Multiple choice question

(i) Which one of the following gases constitutes the major portion of the atmosphere?

(a) Oxygen

(b) Nitrogen

(c) Argon

(d) Carbon dioxide

Answer: (b) Nitrogen


(ii) Atmospheric layer important for human beings is:

(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Ionosphere

Answer:
(c) Troposphere

(iii) Sea salt, pollen, ash, smoke soot, fine soil — these are associated with:

(a) Gases
(b) Dust particles
(c) Water vapour
(d) Meteors

Answer:
(b) Dust particles

 

(iv) Oxygen gas is in negligible quantity at the height of atmosphere:

(a) 90 km
(b) 120 km
(c) 100 km
(d) 150 km

Answer:
(b) 120 km

(v) Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?

(a) Oxygen
(b) Nitrogen
(c) Helium
(d) Carbon dioxide

Answer: (d) Carbon dioxide


2. Answer the following questions in about 30 words

(i) What do you understand by atmosphere?

Answer:
Atmosphere is a mixture of different gases and it envelopes the earth all round. It contains life-giving gases like oxygen for humans and animals and carbon dioxide for plants.


(ii) What are the elements of weather and climate?
 
Answer:
The main elements of weather and climate are temperature, pressure, winds, humidity, clouds and precipitation.


(iii) Describe the composition of atmosphere.

Answer: The atmosphere is composed of gases, water vapour and dust particles.


(iv) Why is troposphere the most important of all the layers of the atmosphere?

Answer: The troposphere is the lowermost layer of the atmosphere. This layer contains dust particles and water vapour. All types of changes in climate and weather take place in this layer. This is the most important layer for all biological activity.


3. Answer the following questions in about 150 words

(i) Describe the composition of the atmosphere.

Answer:
The atmosphere is composed of a number of gases, water vapour and dust particles. Nitrogen and Oxygen are two main gases, which form over 99% of the total volume of the atmosphere. The other gases are argon, carbon dioxide, neon, helium ozone hydrogen, methane, etc. The following chart gives percentage of permanent gases in the atmosphere:

image

 

Water vapour is the most important element of the atmosphere. The average amount of water vapour is nearly 2% of the atmosphere by volume, it may-vary from 4% in the worm and wet tropics to less than 1% in dry and cold areas of deserts and the polar regions.

Dust particles comprise the third major component of the atmosphere. They are derived from different sources and include: sea salts, smoke-soot, fine soil, ash, pollen, dust, etc.


(ii) Draw a suitable diagram for the structure of the atmosphere and label it and describe it.

Answer: Structure of the Atmosphere: The atmosphere consists of different layers with varying density and temperature.

 image

Troposphere: This is the lowermost layer of the atmosphere. Its average height is 16 km, although it is only 10 km at the poles and extends up 18 km at the equator. Temperature decreases with height in this layer, roughly at-the rate of 1°C for 165 metres of ascent. This is known as normal lapse rate.

Stratosphere: It extends up to a height of 50 km. The temperature remains almost constant in its lower portion, up to a height of 20 km.

Mesosphere: It lies above the stratosphere, and extends upto a height of 80 km. The upper limit of mesosphere is known as the mesopause.

Ionosphere: The Ionosphere is located between 80 and 400 km above the mesopause. Temperature here starts increasing with height. It contains electrically charged particles known as ions, and hence, it is known as ionosphere. Radio waves transmitted from the earth are reflected back to the earth by ionosphere.

Exosphere: The exosphere is the outermost layer of the Earth's atmosphere. It starts at an altitude of about 500 km and goes out to about 10,000 km. Temperatures in the Earth’s exosphere remain constant with altitude, averaging about 1500 Km.

 

Fundamental of Physical Geography Chapter 01 Geography as a Discipline
NCERT Solutions Class 11 Geography Chapter 1 Geography as a Discipline
Fundamental of Physical Geography Chapter 02 The Origin and Evolution of the Earth
NCERT Solutions Class 11 Geography Chapter 2 The Origin and Evolution of the Earth
Fundamental of Physical Geography Chapter 03 Interior of the Earth
NCERT Solutions Class 11 Geography Chapter 3 Interior of the Earth
Fundamental of Physical Geography Chapter 04 Distribution of Oceans and Continents
NCERT Solutions Class 11 Geography Chapter 4 Distribution of the Oceans and Continents
Fundamental of Physical Geography Chapter 05 Minerals and Rocks
NCERT Solutions Class 11 Geography Chapter 5 Minerals and Rocks
Fundamental of Physical Geography Chapter 06 Geomorphic Processes
NCERT Solutions Class 11 Geography Chapter 6 Geomorphic processes
Fundamental of Physical Geography Chapter 07 Landforms and their Evolution
NCERT Solutions Class 11 Geography Chapter 7 Landforms and their Evolution
Fundamental of Physical Geography Chapter 08 Composition and Structure of Atmosphere
NCERT Solutions Class 11 Geography Chapter 8 Composition and Structure of Atmosphere
Fundamental of Physical Geography Chapter 09 Solar Radiation, Heat Balance and Temperature
NCERT Solutions Class 11 Geography Chapter 9 Solar Radiation Heat Balance and Temperature
Fundamental of Physical Geography Chapter 10 Atmospheric Circulation and Weather Systems
NCERT Solutions Class 11 Geography Chapter 10 Atmospheric circulation and weather Systems
Fundamental of Physical Geography Chapter 11 Water in the Atmosphere
NCERT Solutions Class 11 Geography Chapter 11 Water in the Atmosphere
Fundamental of Physical Geography Chapter 12 World Climate and Climate Change
NCERT Solutions Class 11 Geography Chapter 12 World Climate and Climate Change
Fundamental of Physical Geography Chapter 13 Water (Oceans)
NCERT Solutions Class 11 Geography Chapter 13 Water Oceans
Fundamental of Physical Geography Chapter 14 Movements of Ocean Water
NCERT Solutions Class 11 Geography Chapter 14 Movements of Ocean Water
Fundamental of Physical Geography Chapter 15 Life on the Earth
NCERT Solutions Class 11 Geography Chapter 15 Life on the Earth
Fundamental of Physical Geography Chapter 16 Biodiversity and Conservation
NCERT Solutions Class 11 Geography Chapter 16 Biodiversity and Conservation
India Physical Environment Chapter 01 India Location
NCERT Solutions Class 11 Geography Chapter 1 India Location
India Physical Environment Chapter 02 Structure and Physiography
NCERT Solutions Class 11 Geography Chapter 2 Structure and Physiography
India Physical Environment Chapter 03 Drainage System
NCERT Solutions Class 11 Geography Chapter 3 Drainage System
India Physical Environment Chapter 04 Climate
NCERT Solutions Class 11 Geography Chapter 4 Climate
India Physical Environment Chapter 05 Natural Vegetation
NCERT Solutions Class 11 Geography Chapter 5 Natural Vegetation
India Physical Environment Chapter 06 Soils
NCERT Solutions Class 11 Geography Chapter 6 Soils
India Physical Environment Chapter 07 Natural Hazards and Disasters
NCERT Solutions Class 11 Geography Chapter 7 Natural Hazards and Disasters
Practical Work in Geography Chapter 01 Introduction to Maps
NCERT Solutions Class 11 Geography Chapter 1 Introduction to Maps
Practical Work in Geography Chapter 02 Map Scale
NCERT Solutions Class 11 Geography Chapter 2 Map Scale
Practical Work in Geography Chapter 03 Latitude, Longitude and Time
NCERT Solutions Class 11 Geography Chapter 3 Latitude Longitude and Time
Practical Work in Geography Chapter 04 Map Projections
NCERT Solutions Class 11 Geography Chapter 4 Map Projections
Practical Work in Geography Chapter 05 Topographical Maps
NCERT Solutions Class 11 Geography Chapter 5 Topographical Maps
Practical Work in Geography Chapter 06 Introduction To Aerial Photographs
NCERT Solutions Class 11 Geography Chapter 6 Introduction to Aerial Photographs
Practical Work in Geography Chapter 07 Introduction To Remote Sensing
NCERT Solutions Class 11 Geography Chapter 7 Introduction to Remote Sensing
Practical Work in Geography Chapter 08 Weather Instruments, Maps and Charts
NCERT Solutions Class 11 Geography Chapter 8 Weather Instruments Maps and Charts

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NCERT Solutions Class 11 Geography Chapter 8 Composition and Structure of Atmosphere

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Chapter 8 Composition and Structure of Atmosphere Class 11 Geography NCERT Solutions

The Class 11 Geography NCERT Solutions Chapter 8 Composition and Structure of Atmosphere are designed in a way that will help to improve the overall understanding of students. The answers to each question in Chapter 8 Composition and Structure of Atmosphere of Geography Class 11 has been designed based on the latest syllabus released for the current year. We have also provided detailed explanations for all difficult topics in Chapter 8 Composition and Structure of Atmosphere Class 11 chapter of Geography so that it can be easier for students to understand all answers.

NCERT Solutions Chapter 8 Composition and Structure of Atmosphere Class 11 Geography

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Chapter 8 Composition and Structure of Atmosphere Class 11 NCERT Solution Geography

These solutions of Chapter 8 Composition and Structure of Atmosphere NCERT Questions given in your textbook for Class 11 Geography have been designed to help students understand the difficult topics of Geography in an easy manner. These will also help to build a strong foundation in the Geography. There is a combination of theoretical and practical questions relating to all chapters in Geography to check the overall learning of the students of Class 11.

Class 11 NCERT Solution Geography Chapter 8 Composition and Structure of Atmosphere

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