The NCERT Solutions are simple and easy to use. They not only answer students’ questions in a theoretical and practical manner, but they also teach them the most simple and to-the-point approaches for getting good grades. The solutions are prepared by subject experts and professionals with years of experience and knowledge. The solutions greatly help students in completing their subject assignments and also adequately preparing for their exams.
NCERT Solutions for Class 7 Social Science Chapter 2 – Inside Our Earth
Access NCERT Solutions for Class 7 Social Science Geography Chapter 2 – Inside our Earth
What Do You Learn in Class 7 Geography Chapter 2?
Chapter 2 introduces students to what lies in the interior of the earth. Here is an overview of the chapter.
Interior of the Earth
Earth is made up of many concentric layers. The uppermost layer on the earth’s surface is called the crust. It is about 35 km on continental masses and 5km on ocean floors and is the thinnest layer of all. Silica and Alumina are the main mineral constituents of the continental mass. The oceanic crust mainly has silica and magnesium.
The mantle is another layer that is just beneath the crust and has a depth of 2900 km.
The core is the innermost layer. It mainly comprises iron and nickel, and has a radius of 3500. The core has a very high temperature and pressure.
Rocks and Minerals
A rock is any natural mass of mineral matter that makes up the crust of the earth. A rock can have different size, colour and texture. There are three main types of rocks:
Igneous rock – This type of rock is formed when the molten magma cools down and becomes solid. It is also called primary rock. Igneous rocks also have two types – intrusive and extrusive rocks.
Sedimentary rock – The rocks that roll down, crack and break down into small sediments are transported and deposited by water, wind etc. When these loose sediments compress and become hard, they form layers of rocks called sedimentary rocks. Sandstone is an example of sedimentary rock.
Metamorphic rock – Both igneous and sedimentary rocks can change into metamorphic rock, when there’s high heat and pressure.
Rocks are used for making houses, roads, and other structures. Also, one type of rock can change into another type under specific conditions, and this process is called the rock cycle.
Rocks are made from different minerals. Minerals are naturally occurring substances with certain physical properties and a definite chemical composition. Some of the minerals are fuels such as natural gas, coal and petroleum. Minerals are very useful and important for humankind.
Why is it necessary for students to study Social Science Our Environment Chapter-2 – Inside Our Earth Solutions by Extramarks?
Our Environment textbook focuses on giving students an understanding of the environment they live in. It also talks about the components of the environment, such as man-made components, natural components (air, water, land, and living things), and human components, in great detail. Students also learn about life in various terrains such as temperate grasslands, deserts, etc. Our Environment is an integral part of the Class 7 curriculum because it teaches children about the various aspects of nature.
The practise questions given at the end help students in gauging their understanding of the chapter. These are great from a revision perspective. However, students are often unable to write accurate and to-the-point answers to these questions. This is why they must refer to the NCERT Solutions for Class 7 Geography Chapter 2. The solutions have answers written in simple yet comprehensive manner so that students can understand the reasoning and perform better in exams.
How do the experts at Extramarks help?
The subject experts at Extramarks have given a fair idea of Chapter 2 through their NCERT Solutions, which in turn helps students in securing higher marks in exams. With the help of solutions, students will understand every concept and get to know how to write the answers easily. It is written in an easy to understand language by the subject matter experts. It is a thoroughly researched material made as per the CBSE examination guidelines. When students study from it, they will get an edge over their peers.
NCERT Class 7 Social Science Our Environment Chapterwise Solutions
Students can access NCERT Solutions for Class 7 Social Science Geography for following chapters:
- Chapter 1: Environment
- Chapter 2: Inside Our Earth
- Chapter 3: Our Changing Earth
- Chapter 4: Air
- Chapter 5: Water
- Chapter 6: Natural Vegetation and Wildlife
- Chapter 7: Human Environment – Settlement, Transportation and Communication
- Chapter 8: Human Environment Interactions – The Tropical and The Subtropical Region
- Chapter 9: Life in the Temperate Grasslands
NCERT Solutions for Class 7 Social Science
Extramarks provides NCERT solutions for Social Science and also for other subjects. All the solutions are accessible on the website and Extramarks’ app.