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Unit15

CONSTITUTION OF INDIA - Fundamental Rights

FUNDAMENTALS

OF

PHYSICAL GEOGRAPHY

TEXTBOOK FOR CLASS XI

11092
11092
विद्या 5 मृतमस्नुतेएनसीई आरटीNCERT
विद्या 5 मृतमस्नुतेएनसीई आरटीNCERT

राष्ट्रीय शैक्षिक अनुसंधान और प्रशिक्षण परिषद्

NATIONAL COUNCIL OF EDUCATIONAL RESEARCH AND TRAINING

11092 - FUNDAMENTALS OF PHYSICAL GEOGRAPHY

Textbook for Class XI

ISBN 81-7450-518-0

First Edition

March 2006 Phalguna 1927

Reprinted

October 2006, November 2007, December 2008, January 2010, January 2011, March 2012, January 2013, November 2013, December 2014, December 2015, March 2017, February 2018, February 2019, August 2019, July 2021 and November 2021

Rationalised Edition

December 2022 Agrahayana 1944

Reprinted

March 2024 Chaitra 1946 June 2024 Jyaishtha 1946 December 2024 Agrahayana 1946

PD 90T BS

© National Council of Educational Research and Training, 2006, 2022

₹ 90.00

Printed on 80 GSM paper with NCERT watermark

Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi 110016 and printed at Amar Ujala Limited, C-21, Sector-59, Noida (U.P.) 201301

ALL RIGHTS RESERVED

•
☐ No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of the publisher.
•
This book is sold subject to the condition that it shall not, by way of trade, be lent, re-sold, hired out or otherwise disposed of without the publisher's consent, in any form of binding or cover other than that in which it is published.
•
☐ The correct price of this publication is the price printed on this page. Any revised price indicated by a rubber stamp or by a sticker or by any other means is incorrect and should be unacceptable.

OFFICES OF THE PUBLICATION

DIVISION, NCERT

NCERT Campus Sri Aurobindo Marg

New Delhi 110 016

Phone : 011-26562708

108, 100 Feet Road Hosdakere Halli Extension Banashankari III Stage

Bengaluru 560 085

Phone : 080-26725740

Navjivan Trust Building

P.O.Navjivan

Ahmedabad 380 014

Phone : 079-27541446

CWC Campus Opp. Dhankal Bus Stop Panihati

Kolkata 700 114

CWC Complex

Maligaon

Guwahati 781 021

Phone : 033-25530454

Phone : 0361-2674869

Publication Team

Head, Publication : M.V. Srinivasan Division

Chief Editor : Bijnan Sutar

Chief Production : Jahan Lal Officer (In charge)

Chief Business : Amitabh Kumar Manager

Assistant Editor : R.N. Bhardwaj

Assistant Production : Sayuraj A.R. Officer

Cover

Shweta Rao

Illustrations

K.N. Prudhvi Raju Nidhi Wadhwa Dilip Kumar

Cartography

Cartographic Designs Agency

FOREWORD

The National Curriculum Framework (NCF), 2005, recommends that children's life at school must be linked to their life outside the school. This principle marks a departure from the legacy of bookish learning which continues to shape our system and causes a gap between the school, home and community. The syllabi and textbooks developed on the basis of NCF signify an attempt to implement this basic idea. They also attempt to discourage rote learning and the maintenance of sharp boundaries between different subject areas. We hope these measures will take us significantly further in the direction of a child-centred system of education outlined in the National Policy on Education (1986).

The success of this effort depends on the steps that school principals and teachers will take to encourage children to reflect on their own learning and to pursue imaginative activities and questions. We must recognise that, given space, time and freedom, children generate new knowledge by engaging with the information passed on to them by adults. Treating the prescribed textbook as the sole basis of examination is one of the key reasons why other resources and sites of learning are ignored. Inculcating creativity and initiative is possible if we perceive and treat children as participants in learning, not as receivers of a fixed body of knowledge.

These aims imply considerable change in school routines and mode of functioning. Flexibility in the daily time-table is as necessary as rigour in implementing the annual calendar so that the required number of teaching days are actually devoted to teaching. The methods used for teaching and evaluation will also determine how effective this textbook proves for making children's life at school a happy experience, rather than a source of stress or boredom. Syllabus designers have tried to address the problem of curricular burden by restructuring and reorienting knowledge at different stages with greater consideration for child psychology and the time available for teaching. The textbook attempts to enhance this endeavour by giving higher priority and space to opportunities for contemplation and wondering, discussion in small groups, and activities requiring hands-on experience.

The National Council of Educational Research and Training (NCERT) appreciates the hard work done by the textbook development committee responsible for this book. We wish to thank the Chairperson of the advisory committee for textbooks in Social Sciences, at the higher secondary level, Professor Hari Vasudevan and the Chief Advisor for this book, Professor M.H. Qureshi for guiding the work of this committee. Several teachers contributed to the development of this textbook; we are grateful to their principals for making this possible. We are indebted to the institutions and organisations

iv

which have generously permitted us to draw upon their resources, material and personnel. We are especially grateful to the members of the National Monitoring Committee, appointed by the Department of Secondary and Higher Education, Ministry of Human Resource Development under the Chairpersonship of Professor Mrinal Miri and Professor G.P. Deshpande, for their valuable time and contribution. As an organisation committed to systemic reform and continuous improvement in the quality of its products, NCERT welcomes comments and suggestions which will enable us to undertake further revision and refinement.

New Delhi

20 December 2005

Director

National Council of

Educational

Research and

Training

RATIONALISATION OF CONTENT IN THE TEXTBOOKS

In view of the COVID-19 pandemic, it is imperative to reduce content load on students. The National Education Policy 2020, also emphasises reducing the content load and providing opportunities for experiential learning with creative mindset. In this background, the NCERT has undertaken the exercise to rationalise the textbooks across all classes. Learning Outcomes already developed by the NCERT across classes have been taken into consideration in this exercise.

Contents of the textbooks have been rationalised in view of the following:

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Overlapping with similar content included in other subject areas in the same class
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Similar content included in the lower or higher class in the same subject
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Difficulty level
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Content, which is easily accessible to students without much interventions from teachers and can be learned by children through self-learning or peer-learning
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Content, which is irrelevant in the present context

This present edition, is a reformatted version after carrying out the changes given above.

THE CONSTITUTION OF INDIA

PREAMBLE

WE, THE PEOPLE OF INDIA, having solemnly resolved to constitute India into a 1^{1} [SOVEREIGN SOCIALIST SECULAR DEMOCRATIC REPUBLIC] and to secure to all its citizens :

JUSTICE, social, economic and political;

LIBERTY of thought, expression, belief, faith and worship;

EQUALITY of status and of opportunity; and to promote among them all

FRATERNITY assuring the dignity of the individual and the 2^{2} [unity and integrity of the Nation];

IN OUR CONSTITUENT ASSEMBLY this twenty-sixth day of November, 1949 do HEREBY ADOPT, ENACT AND GIVE TO OURSELVES THIS CONSTITUTION.

Unsupported block type: page_footnote
Unsupported block type: page_footnote

TEXTBOOK DEVELOPMENT COMMITTEE

CHAIRPERSON, ADVISORY COMMITTEE FOR TEXTBOOKS IN SOCIAL SCIENCES AT THE HIGHER SECONDARY LEVEL

Hari Vasudevan, Professor, Department of History, University of Calcutta, Kolkata

CHIEF ADVISOR

M. H. Qureshi, Professor, Centre for the Study of Regional Development, Jawaharlal Nehru University, New Delhi

MEMBERS

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Indu Sharma, PGT, Geography, RIE Demonstration School, Ajmer
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K. Kumaraswamy, Professor, Department of Geography, Bharatidasan University, Tiruchirapalli
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K. N. Prudhvi Raju, Professor, Department of Geography, Banaras Hindu University, Varanasi
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K. S. Sivasami, Professor (Retd.), Centre for the Study of Regional Development, Jawaharlal Nehru University, New Delhi
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L. Cajee, Reader, Department of Geography, North-Eastern Hill University, Shillong
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P. K. Malik, Lecturer, Geography, Govt. College, Tavru, Gurgaon
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S. R. Jog, Professor (Retd.), Department of Geography, University of Pune, Pune

MEMBER-COORDINATOR

Aparna Pandey, Lecturer, Geography, DESSH, NCERT, New Delhi

ACKNOWLEDGEMENTS

The National Council of Educational Research and Training acknowledges the contribution of Ashok Diwakar, Lecturer, Geography, Govt. College, Sector-9, Gurgaon in the development of this textbook.

The Council also gratefully acknowledges the support of individuals and organisations as listed below for providing various photographs, and other materials such as articles used in this textbook: R. Vaidyanadhan (Fig. 5.3 and 6.1); N. S. Saini (Fig. 5.4, 5.7 and 6.4); Y. Ramesh and Krishnam Raju, VSVG, (USA) (Fig. 6.11); K.N. Prudhvi Raju (Fig. 6.2, 6.5, 6.7, 6.9, 6.12 and 6.15); ITDC/Ministry of Tourism, Govt. of India, (Fig. 11.1 and 11.2); Ministry of Environment and Forests, Govt. of India (Fig. 14.1, 14.2, 14.3); The Times of India, New Delhi (Photograph on earthquake destruction, Collage on tsunami on page 25 and global warming on page 109); Social Science Textbook for Class VIII, Part II (NCERT, 2005), (Photographs related to volcanoes on page 26-27).

Acknowledgements are due to Savita Sinha, Professor and Head, Department of Education in Social Sciences and Humanities for her support and finalising this textbook.

The Council also gratefully acknowledges the contributions of Ishwar Singh, Arvind Sharma and Anil Sharma, DTP Operators; Sameer Khatana and Amar Kumar Prusty, Copy Editors; Shrestha, Deepti Sharma and Bharat Sanwaria, Proof Reader; Dinesh Kumar, Computer Incharge, who have helped in giving a final shape to this book. The contribution of the Publication Department, NCERT are also duly acknowledged.

CONTENTS

FOREWORD iii

UNIT I : GEOGRAPHY AS A DISCIPLINE 1-12

1. Geography as a Discipline 2

UNIT II : THE EARTH 13-38

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The Origin and Evolution of the Earth 14
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Interior of the Earth 21
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Distribution of Oceans and Continents 30

UNIT III : LANDFORMS 36-62

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Geomorphic Processes 37
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Landforms and their Evolution 47

UNIT IV : CLIMATE 63-98

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Composition and Structure of Atmosphere 64
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Solar Radiation, Heat Balance and Temperature 67
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Atmospheric Circulation and Weather Systems 76
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Water in the Atmosphere 86
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World Climate and Climate Change 91

UNIT V : WATER (OCEANS) 99-113

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Water (Oceans) 99
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Movements of Ocean Water 108

UNIT VI : LIFE ON THE EARTH 114-120

14. Biodiversity and Conservation 114

GLOSSARY 121-124

CONSTITUTION OF INDIA

Part III (Articles 12 - 35)

(Subject to certain conditions, some exceptions

and reasonable restrictions)

guarantees these

Fundamental Rights

Right to Equality

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before law and equal protection of laws;
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irrespective of religion, race, caste, sex or place of birth;
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• of opportunity in public employment;
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by abolition of untouchability and titles.

Right to Freedom

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of expression, assembly, association, movement, residence and profession;
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of certain protections in respect of conviction for offences;
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• of protection of life and personal liberty;
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of free and compulsory education for children between the age of six and fourteen years;
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of protection against arrest and detention in certain cases.

Right against Exploitation

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for prohibition of traffic in human beings and forced labour;
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for prohibition of employment of children in hazardous jobs.

Right to Freedom of Religion

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freedom of conscience and free profession, practice and propagation of religion;
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freedom to manage religious affairs;
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freedom as to payment of taxes for promotion of any particular religion;
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freedom as to attendance at religious instruction or religious worship in educational institutions wholly maintained by the State.

Cultural and Educational Rights

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for protection of interests of minorities to conserve their language, script and culture;
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for minorities to establish and administer educational institutions of their choice.

Right to Constitutional Remedies

- by issuance of directions or orders or writs by the Supreme Court and High Courts for enforcement of these Fundamental Rights.