Class 7 NCERT Solutions Geography Social Science Chapter 2 Inside Our Earth

NCERT Solutions Class 7 Geography Chapter 2 PDF

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NCERT Solutions for Class 7 Geography Social Science Chapter 2-Inside Our Earth is provided here according to the latest NCERT (CBSE) guidelines. Students can easily access the solutions which include important chapter questions and detailed explanations provided by our experts. Students can further clear all their doubts and also get better marks in the exam. This chapters important topics are more or less, NCERT class 7 geography chapter 2 PDF. It will enable the students to understand the chapter entirely and allow them to solve question answers independently. class 7 geography chapter 2 questions and answers have been largely compiled by teachers with experience and after studying the last ten years of examination papers.
Further, they are all designed with the latest academic year subject material so that any difference in the syllabus is accounted for as well. With these solutions, students will be able to understand each topic clearly and at the same time prepare well for the exams. To give you a brief idea of the chapter, it basically deals with topics like;

  • Understanding what are metamorphic rocks
  • Describing the term ‘Sedimentary rocks are formed from sediments
  • Finding out what do you mean by the rock cycle

Get CBSE Class 7 Geography NCERT solutions for chapter 2-Inside Our Earth below. These solutions consist of answers to all the important questions in NCERT book chapter 2.

NCERT Solutions Class 7 Geography Chapter 2 

Page No: 10 Exercises 

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

Answer: The three layers of the Earth are the crust, the mantle and the core. 

(ii) What is a rock? 

Answer: Any natural mass of mineral matter that makes up the earth’s crust is called a rock. 

(iii) Name three types of rocks. 

Answer: The three types of rocks are igneous rocks, sedimentary rocks and metamorphic rocks.

(iv) How are extrusive and intrusive rocks formed? 

Answer: Extrusive rocks are formed by the molten lava which comes on the earth’s surface and rapidly cools down to become solid. When the molten magma cools down deep inside the earth’s crust then the solid rocks so formed are called intrusive rocks. 

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

Answer: When one type of rock changes to another type under certain conditions in a cyclic manner then this process of transformation of the rock from one to another is known as the rock cycle. 

(vi) What are the uses of rocks? 

Answer: Uses of rocks: (i) Hard rocks are used in the construction of buildings and roads. (ii) Some rocks are shiny and precious therefore used for making jewellery. (iii) Rocks are made up of different minerals and are very important to humankind. (iv) Some are used as fuels. For example, coal, natural gas and petroleum. (v) Soft rocks are used for making talcum powder, chalks etc. 

(vii) What are metamorphic rocks? 

Answer: The rocks which are formed due to the conversion of igneous and sedimentary rocks under great heat and pressure are called metamorphic rocks.

2. Tick the correct answer. 

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

(a) Igneous 

(b) Sedimentary 

(c) Metamorphic 

✓ (a) Igneous 

(ii) The innermost layer of the earth is 

(a) Crust 

(b) Core 

(c) Mantle 

✓ (b) Core 

(iii) Gold, petroleum and coal are examples of 

(a) Rocks 

(b) Minerals 

(c) Fossils 

✓ (b) Minerals 

(iv) Rocks which contain fossils are 

(a) Sedimentary rocks 

(b) Metamorphic rocks 

(c) Igneous rocks 

✓ (a) Sedimentary rocks 

(v) The thinnest layer of the earth is 

(a) Crust 

(b) Mantle 

(c) Core 

✓ (a) Crust

3. Match the following. 

(i) Core (a) Earth’s surface 

(ii) Minerals (b) Used for roads and buildings 

(iii) Rocks (c) Made of silicon and alumina 

(iv) Clay (d) Has definite chemical composition 

(v) Sial (e) Innermost layer 

(f) Changes into slate 

(g) Process of transformation of the rock 

Answer 

(i) Core (e) Innermost layer 

(ii) Minerals (d) Has the definite chemical composition 

(iii) Rocks (b) Used for roads and buildings 

(iv) Clay (f) Changes into slate 

(v) Sial (c) Made of silicon and alumina

4. 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. 

Answer 

(i) We cannot go to the centre of the earth because it has a very high temperature and pressure and lies 6000 km below the ocean floor. We will not be able to survive there because there is no oxygen or favourable conditions. 

(ii) Sedimentary rocks are formed from sediments because of extreme compression and hardening of the particles of sediment which are transported and deposited by wind, water etc. 

(iii) Limestone is changed into marble because of extreme heat and pressure as it is a sedimentary rock.

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