NCERT Solutions Class 11 Geography Chapter 2 The Origin and Evolution of the Earth 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 2 The Origin and Evolution of the Earth is an important topic in Class 11, please refer to answers provided below to help you score better in exams
Chapter 2 The Origin and Evolution of the Earth Class 11 Geography NCERT Solutions
Class 11 Geography students should refer to the following NCERT questions with answers for Chapter 2 The Origin and Evolution of the Earth in Class 11. These NCERT Solutions with answers for Class 11 Geography will come in exams and help you to score good marks
Chapter 2 The Origin and Evolution of the Earth NCERT Solutions Class 11 Geography
NCERT Solution for Class 11 Geography for chapter 2 The Origin and Evolution of the Earth
1. Multiple choice question
(i) Which one of the following figures represents the age of the earth?
(a) 4.6 million years
(b) 13.7 billion years
(c) 4.6 billion years
(d) 13.7 trillion years
Answer: (c) 4.6 billion years
(ii) Which one of the following has the longest duration?
(a) Eons
(b) Period
(c) Era
(d) Epoch
Answer: (a) Eons
(iii) Which one of the following is not related to the formation or modification of the present atmosphere?
(a) Solar winds
(b) Differentiation
(c) Degassing
(d) Photosynthesis
Answer: (b) Differentiation
(iv) Which one of the following represents the inner planets?
(a) Planets between the sun and the earth
(b) Planets between the sun and the belt of asteroids
(c) Planets in gaseous state
(d) Planets without satellite(s)
Answer: (b) Planets between the sun and the belt of asteroids
(v) Life on the earth appeared around how many years before the present?
(a) 13.7 billion
(b) 4.6 billion
(c) 3.8 million
(d) 3.8 billion
Answer: (d) 3.8 billion
2. Answer the following questions in about 30 words
(i) Why are the terrestrial planets rocky?
Answer: Mercury, Venus, Earth and Mars are called "rocky" or "terrestrial" planets. Terrestrial planets mean earth-like planets. These are similar to Earth in composition. Heat from the Sun evaporated lightweight elements like hydrogen and helium into interplanetary space. Mostly rock and metal was left in this zone and clumped together to form the inner rocky planets.
(ii) What is the basic difference in the arguments related to the origin of the earth given by:
(a) Kant and Laplace
Answer: Immanuel Kant argued that the earth was formed from small and cold particles. Laplace revised this theory and postulated nebular hypothesis. The hypothesis considered that the planets were formed out of a cloud of material associated with the youthful sun.
(b) Chamberlain and Moulton
Answer: Chamberlain and Moulton considered that a wandering star approached the sun. As a result, a cigar- shaped extension of material was separated from the surface of the sun. As the passing star moved away, the material continued to revolve around the sun and it slowly condensed into planets.
(iii) What is meant by the process of differentiation?
Answer: The process through which the earth forming material got separated into different layers is called differentiation. The interior structure of the Earth is layered in spherical shells, like an onion and it may be divided into the crust, upper mantle, lower mantle, outer core and inner core.
(iv) What was the nature of the earth surface initially?
Answer: In the beginning, the earth was barren, rocky and hot sphere with a very thin atmosphere consisting of hydrogen and helium.
(v) What were the gases which initially formed the earth’s atmosphere?
Answer: Initially the earth's atmosphere consisted of hydrogen and helium. Later on, the earth's atmosphere was stripped off these gases due to solar winds.
3. Answer the following questions in about 150 words
(i) Write an explanatory note on the ‘Big Bang Theory’.
Answer: The most popular argument regarding the origin of the universe is the Big Bang Theory. It is also called expanding universe hypothesis. In 1920, Edwin Hubble provided evidence that the universe is expanding. The Big Bang Theory was postulated in 1950s and 1960s and validated in 1972. According to this theory, everything in the universe emerged from a point known as singularity about 13.7 billion years ago. As the universe expanded, the hot radiation in the original fireball also expanded and cooled down. Misty clouds of matter already existed. As those clouds collapsed upon themselves, they were pulled together by their own gravity and formed clusters of galaxies with the galaxies themselves breaking up into stars like those of the Milky Way. The stars might have broken up to form their planets like those of our solar system.
(ii) List the stages in the evolution of the earth and explain each stage in brief.
Answer: The Big Bang Theory considers the following stages in the development of the universe.
(i) In the beginning, all matter forming the universe existed in one place in the form of a “tiny ball” with an unimaginably small volume, infinite temperature and infinite density.
(ii) At the Big Bang, the “tiny ball” exploded violently. This led to a huge expansion around 13.7 billion years ago.
(iii) Within 300,000 years from the Big Bang, temperature dropped to 4,500 Kelvin and gave rise to atomic matter.
These conditions are conducive to the existences of life on the earth, which have led to evolution of life between 4600 million years and the present. The earth has layered structure with each layer, form the outermost end of the atmosphere to the centre of the earth, having different material. Life on the earth, evolved at a much later stage.
NCERT Solutions Class 11 Geography Chapter 1 Geography as a Discipline |
NCERT Solutions Class 11 Geography Chapter 2 The Origin and Evolution of the Earth |
NCERT Solutions Class 11 Geography Chapter 3 Interior of the Earth |
NCERT Solutions Class 11 Geography Chapter 4 Distribution of the Oceans and Continents |
NCERT Solutions Class 11 Geography Chapter 5 Minerals and Rocks |
NCERT Solutions Class 11 Geography Chapter 6 Geomorphic processes |
NCERT Solutions Class 11 Geography Chapter 7 Landforms and their Evolution |
NCERT Solutions Class 11 Geography Chapter 8 Composition and Structure of Atmosphere |
NCERT Solutions Class 11 Geography Chapter 9 Solar Radiation Heat Balance and Temperature |
NCERT Solutions Class 11 Geography Chapter 10 Atmospheric circulation and weather Systems |
NCERT Solutions Class 11 Geography Chapter 11 Water in the Atmosphere |
NCERT Solutions Class 11 Geography Chapter 12 World Climate and Climate Change |
NCERT Solutions Class 11 Geography Chapter 13 Water Oceans |
NCERT Solutions Class 11 Geography Chapter 14 Movements of Ocean Water |
NCERT Solutions Class 11 Geography Chapter 15 Life on the Earth |
NCERT Solutions Class 11 Geography Chapter 16 Biodiversity and Conservation |
NCERT Solutions Class 11 Geography Chapter 1 India Location |
NCERT Solutions Class 11 Geography Chapter 2 Structure and Physiography |
NCERT Solutions Class 11 Geography Chapter 3 Drainage System |
NCERT Solutions Class 11 Geography Chapter 4 Climate |
NCERT Solutions Class 11 Geography Chapter 5 Natural Vegetation |
NCERT Solutions Class 11 Geography Chapter 6 Soils |
NCERT Solutions Class 11 Geography Chapter 7 Natural Hazards and Disasters |
NCERT Solutions Class 11 Geography Chapter 1 Introduction to Maps |
NCERT Solutions Class 11 Geography Chapter 2 Map Scale |
NCERT Solutions Class 11 Geography Chapter 3 Latitude Longitude and Time |
NCERT Solutions Class 11 Geography Chapter 4 Map Projections |
NCERT Solutions Class 11 Geography Chapter 5 Topographical Maps |
NCERT Solutions Class 11 Geography Chapter 6 Introduction to Aerial Photographs |
NCERT Solutions Class 11 Geography Chapter 7 Introduction to Remote Sensing |
NCERT Solutions Class 11 Geography Chapter 8 Weather Instruments Maps and Charts |
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NCERT Solutions Class 11 Geography Chapter 2 The Origin and Evolution of the Earth
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Chapter 2 The Origin and Evolution of the Earth Class 11 Geography NCERT Solutions
The Class 11 Geography NCERT Solutions Chapter 2 The Origin and Evolution of the Earth are designed in a way that will help to improve the overall understanding of students. The answers to each question in Chapter 2 The Origin and Evolution of the Earth 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 2 The Origin and Evolution of the Earth Class 11 chapter of Geography so that it can be easier for students to understand all answers.
NCERT Solutions Chapter 2 The Origin and Evolution of the Earth Class 11 Geography
Class 11 Geography NCERT Solutions Chapter 2 The Origin and Evolution of the Earth is a really good source using which the students can get more marks in exams. The same questions will be coming in your Class 11 Geography exam. Learn the Chapter 2 The Origin and Evolution of the Earth questions and answers daily to get a higher score. Chapter 2 The Origin and Evolution of the Earth of your Geography textbook has a lot of questions at the end of chapter to test the students understanding of the concepts taught in the chapter. Students have to solve the questions and refer to the step-by-step solutions provided by Geography teachers on studiestoday to get better problem-solving skills.
Chapter 2 The Origin and Evolution of the Earth Class 11 NCERT Solution Geography
These solutions of Chapter 2 The Origin and Evolution of the Earth 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 2 The Origin and Evolution of the Earth
NCERT Solutions Class 11 Geography Chapter 2 The Origin and Evolution of the Earth detailed answers are given with the objective of helping students compare their answers with the example. NCERT solutions for Class 11 Geography provide a strong foundation for every chapter. They ensure a smooth and easy knowledge of Revision notes for Class 11 Geography. As suggested by the HRD ministry, they will perform a major role in JEE. Students can easily download these solutions and use them to prepare for upcoming exams and also go through the Question Papers for Class 11 Geography to clarify all doubts
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