NCERT Class 7 Geography Inside Our Earth

Read and download NCERT Class 7 Geography Inside Our Earth in NCERT book for Class 7 Social Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Social Science textbook for Class 7 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 7 Social Science to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth

Class 7 Social Science students should refer to the following NCERT Book Our Environment Chapter 2 Inside Our Earth in Class 7. This NCERT Book for Class 7 Social Science will be very useful for exams and help you to score good marks

Our Environment Chapter 2 Inside Our Earth NCERT Book Class 7

 

Inside Our Earth

The earth, our homeland is a dynamic planet. It is constantly undergoing changes inside and outside. Have you ever wondered what lies in the interior of the earth? What is the earth made up of?

INTERIOR OF THE EARTH

Just like an onion, the earth is made up of several concentric layers with one inside another (Fig. 2.1). The uppermost layer over the earth’s surface is called the crust. It is the thinnest of all the layers. It is about 35 km. on the continental masses and only 5 km. on the ocean floors.

The main mineral constituents of the continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina). The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium) (Fig. 2.2). Just beneath the crust is the mantle which extends up to a depth of 2900 km. below the crust The innermost layer is the core with a radius of about 3500 km. It is mainly made up of nickel and iron and is called nife (ni – nickel and fe – ferrous i.e. iron). The central core has very high temperature and pressure.

ROCKS AND MINERALS

The earth’s crust is made up of various types of rocks. Any natural mass of mineral matter that makes up the earth’s crust is called a rock. Rocks can be of different colour, size and texture.

There are three major types of rocks: igneous rocks, sedimentary rocks and metamorphic rocks. When the molten magma cools, it becomes solid. Rocks thus formed are called igneous rocks. They are also called primary rocks. There are two types of igneous rocks: intrusive rocks and extrusive rocks. Can you imagine lava coming out from the volcanoes? 

Lava is actually fiery red molten magma coming out from the interior of the earth on its surface. When this molten lava comes on the earth’s surface, it rapidly cools down and becomes solid. Rocks formed in such a way on the crust are called extrusive igneous rocks. They have a very fine grained structure. For example, basalt. The Deccan plateau is made up of basalt rocks. Sometimes the molten magma cools down deep inside the earth’s crust. Solid rocks so formed are called intrusive igneous rocks. Since they cool down slowly they form large grains. Granite is an example of such a rock. Grinding stones used to prepare paste/powder of spices and grains are made of granite.

Rocks roll down, crack, and hit each other and are broken down into small fragments. These smaller particles are called sediments. These sediments are transported and deposited by wind, water, etc. These loose sediments are compressed and hardened to form layers of rocks. These types of rocks are called sedimentary rocks. For example, sandstone is made from grains of sand. These rocks may als contain fossils of plants, animals and other microorganisms that once lived on them. Igneous and sedimentary rocks can change into metamorphic rocks under great heat and pressure (Fig. 2.3). For example, clay changes into slate and limestone into marble.

Exercises

1. Answer the following questions.

(i) What are the three layers of the earth?

(ii) What is a rock?

(iii) Name three types of rocks.

(iv) How are extrusive and intrusive rocks formed?

(v) What do you mean by a rock cycle?

(vi) What are the uses of rocks?

(vii) What are metamorphic rocks?

2. Tick the correct answer.

(i) The rock which is made up of molten magma is

(a) Igneous   (b) Sedimentary (c) Metamorphic

(ii) The innermost layer of the earth is

(a) Crust     (b) Core         (c) Mantle

(iii) Gold, petroleum and coal are examples of

(a) Rocks    (b) Minerals     (c) Fossils

(iv) Rocks which contain fossils are

(a) Sedimentary rocks

(b) Metamorphic rocks

(c) Igneous rocks

(v) The thinnest layer of the earth is

(a) Crust   (b) Mantle     (c) Core

3. Give reasons.

(i) We cannot go to the centre of the earth.

(ii) Sedimentary rocks are formed from sediments.

(iii) Limestone is changed into marble.


Please refer to attached file for NCERT Class 7 Geography Inside Our Earth

Our Environment Chapter 01 Environment
NCERT Class 7 Geography Environment
Our Environment Chapter 02 Inside Our Earth
NCERT Class 7 Geography Inside Our Earth
Our Environment Chapter 03 Our Changing Earth
NCERT Class 7 Geography Our Changing Earth
Our Environment Chapter 04 Air
NCERT Class 7 Geography Air
Our Environment Chapter 05 Water
NCERT Class 7 Geography Water
Our Environment Chapter 06 Natural Vegetation and Wild Life
NCERT Class 7 Geography Natural Vegetation and Wild Life
Our Environment Chapter 07 Human Environment
NCERT Class 7 Geography Human Environment
Our Environment Chapter 08 Human Environment Interactions
NCERT Class 7 Geography Human Environment Interactions
Our Environment Chapter 09 Life in the Deserts
NCERT Class 7 Geography Life in the Deserts
Our Pasts II Chapter 01 Tracing Changes Through a Thousand Years
NCERT Class 7 History Tracing Changes Through a Thousand Years
Our Pasts II Chapter 02 New Kings and Kingdoms
NCERT Class 7 History New Kings And Kingdoms
Our Pasts II Chapter 03 The Delhi Sultans
NCERT Class 7 History The Delhi Sultans
Our Pasts II Chapter 04 The Mughal Empire
NCERT Class 7 History Our Pasts 2 The Mughal Empire
Our Pasts II Chapter 05 Rulers And Buildings
NCERT Class 7 History Rulers And Buildings
Our Pasts II Chapter 06 Towns, Traders And Craftspersons
NCERT Class 7 History Towns Traders And Craftsperson
Our Pasts II Chapter 07 Tribes, Nomads And Settled Communities
NCERT Class 7 History Tribes Nomads
Our Pasts II Chapter 08 Devotional Paths To The Divine
NCERT Class 7 History Devotional Paths
Our Pasts II Chapter 09 The Making Of Regional Cultures
NCERT Class 7 History The Making Of Regional Cultures
Our Pasts II Chapter 10 Eighteenth Century Political Formations
NCERT Class 7 History Eighteenth Century Political Formations
Social and Political Life-II Chapter 01 On Equality
NCERT Class 7 Civics Equality in Indian Democracy
Social and Political Life-II Chapter 02 Role of the Government in Health
NCERT Class 7 Civics State Government
Social and Political Life-II Chapter 03 How the State Government Works
NCERT Class 7 Civics How the State Government Works
Social and Political Life-II Chapter 04 Growing up as Boys and Girls
NCERT Class 7 Civics Gender
Social and Political Life-II Chapter 05 Women Change the World
NCERT Class 7 Civics Women Change the World
Social and Political Life-II Chapter 06 Understanding Media
NCERT Class 7 Civics Media and Advertising
Social and Political Life-II Chapter 07 Markets Around Us
NCERT Class 7 Civics Markets Around Us
Social and Political Life-II Chapter 08 A Shirt in the Market
NCERT Class 7 Civics A Shirt in the Market
Social and Political Life-II Chapter 09 Struggles for Equality
NCERT Class 7 Civics Struggles For Equality

Social Science NCERT Book Class 7 Our Environment Chapter 2 Inside Our Earth

The above NCERT Books for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth have been published by NCERT for latest academic session. The textbook by NCERT for Our Environment Chapter 2 Inside Our Earth Social Science Class 7 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Our Environment Chapter 2 Inside Our Earth NCERT etextbooks as the exams for Class 7 Social Science are always asked as per the syllabus defined in these ebooks. These Class 7 Our Environment Chapter 2 Inside Our Earth book for Social Science also includes collection of question. We have also provided NCERT solutions for Class 7 Social Science which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 7 students.

NCERT Book Class 7 Social Science Our Environment Chapter 2 Inside Our Earth

The latest NCERT book for Our Environment Chapter 2 Inside Our Earth pdf have been published by NCERT based on the latest research done for each topic which has to be taught to students in all classes. The books for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth are designed to enhance the overall understanding of students. All Class 7 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 7 students. 

Our Environment Chapter 2 Inside Our Earth NCERT Book Class 7 Social Science

As the students of Class 7 need the books for their regular studies, we have provided all NCERT book for Our Environment Chapter 2 Inside Our Earth in pdf here for free download. All pdf NCERT books available here for Class 7 will help them to read on their mobile or computers. They can take a print of the Class 7 Social Science NCERT Book Our Environment Chapter 2 Inside Our Earth pdf easily and use them for studies. The NCERT textbooks for Class 7 Social Science have been provided chapter-wise and can be downloaded for free of cost. 

Class 7 Social Science Our Environment Chapter 2 Inside Our Earth NCERT Book

Along with Social Science Class 7 NCERT Book in Pdf for Our Environment Chapter 2 Inside Our Earth we have provided all NCERT Books in English Medium for Class 7 which will be really helpful for students who have opted for english language as a medium. Class 7 students will need their books in English so we have provided them here for all subjects in Class 7.

Class 7 Our Environment Chapter 2 Inside Our Earth NCERT Book Social Science

For Class 7 Our Environment Chapter 2 Inside Our Earth we have provided books for students who have opted for Hindi and Urdu medium too. You can click on the links provided above to download all Hindi medium Class 7 Social Science Our Environment Chapter 2 Inside Our Earth book in easy to read pdf format. These books will help Class 7 Social Science students to understand all topics and also strictly follow latest syllabus for their studies. If you are looking to download the pdf version of Class 7 Social Science Our Environment Chapter 2 Inside Our Earth textbook issued by NCERT then you have come to the correct website

Where can I download latest NCERT Book for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth

You can download the NCERT Book for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth for latest session from StudiesToday.com

Can I download the NCERT Books of Class 7 Social Science Our Environment Chapter 2 Inside Our Earth in Pdf

Yes, you can click on the link above and download chapter wise NCERT Books in PDFs for Class 7 for Social Science Our Environment Chapter 2 Inside Our Earth

Are the Class 7 Social Science Our Environment Chapter 2 Inside Our Earth NCERT Book available for the latest session

Yes, the NCERT Book issued for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth have been made available here for latest academic session

How can I download the Class 7 Social Science Our Environment Chapter 2 Inside Our Earth NCERT Book

You can easily access the link above and download the Class 7 NCERT Books Social Science Our Environment Chapter 2 Inside Our Earth for each chapter

Is there any charge for the NCERT Book for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth

There is no charge for the NCERT Book for Class 7 Social Science Our Environment Chapter 2 Inside Our Earth you can download everything free

How can I improve my scores by reading NCERT Book in Class 7 Social Science Our Environment Chapter 2 Inside Our Earth

Regular revision of NCERT Books given on studiestoday for Class 7 subject Social Science Our Environment Chapter 2 Inside Our Earth can help you to score better marks in exams