NCERT Solutions Class 7 Social Science (Geography-Our Environment) Chapter 3 Our Changing Earth– Here are all the NCERT solutions for Class 7 Social Science Chapter 3. This solution contains questions, answers, images, explanations of the complete chapter 3 titled Our Changing Earth of Social Science taught in class 7. If you are a student of class 7 who is using NCERT Textbook to study Social Science, then you must come across chapter 3 Our Changing Earth. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 7 Social Science Chapter 3 Our Changing Earth in one place.
NCERT Solutions Class 7 Social Science Geography Chapter 3 Our Changing Earth
Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Social Science Geography for Class 7 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.
For a better understanding of this chapter, you should also see summary of Chapter 3 Our Changing Earth , Social Science Geography, Class 7.
| Class | 7 |
| Subject | Social Science Geography |
| Book | Our Environment |
| Chapter Number | 3 |
| Chapter Name |
Our Changing Earth |
NCERT Solutions Class 7 Social Science Geography chapter 3 Our Changing Earth
Class 7, Social Science Geography chapter 3, Our Changing Earth solutions are given below in PDF format. You can view them online or download PDF file for future use.
Our Changing Earth Download
Did you find NCERT Solutions Class 7 Social Science Geography chapter 3 Our Changing Earth helpful? If yes, please comment below. Also please like, and share it with your friends!
NCERT Solutions Class 7 Social Science Geography chapter 3 Our Changing Earth- Video
You can also watch the video solutions of NCERT Class7 Social Science Geography chapter 3 Our Changing Earth here.
If you liked the video, please subscribe to our YouTube channel so that you can get more such interesting and useful study resources.
Download NCERT Solutions Class 7 Social Science Geography chapter 3 Our Changing Earth In PDF Format
You can also download here the NCERT Solutions Class 7 Social Science Geography chapter 3 Our Changing Earth in PDF format.
Click Here to download NCERT Solutions for Class 7 Social Science Geography chapter 3 Our Changing Earth
Question & Answer
Q.1: Find out the names of a few rivers of the world that form a delta.
Ans : DIY
Q.2: Answer the following questions.
(i) Why do the plates move?
(ii) What are exogenic and endogenic forces?
(iii) What is erosion?
(iv) How are flood plains formed?
(v) What are sand dunes?
(vi) How are beaches formed?
(vii) What are ox-bow lakes?
Ans : (i) The Lithospheric plates move around because of the movement of the molten magma inside the Earth. (ii) Earth’s movements are divided on the basis of the forces which cause them. The ones that work on the Earth’s surface are called exogenic forces while the ones that work in the Earth’s interior are called endogenic forces. The erosional and depositional activities of wind and water are examples of exogenic forces. Earthquakes and volcanoes are examples of endogenic forces. (iii) Erosion is the weathering or wearing away of the landscape by different agents like wind, water and ice. (iv) During its course through a plain, a river sometimes overflows its banks. This leads to the flooding of the neighbouring areas. As it floods, the river water deposits layers of fine soil and sediments on its banks. This leads to the formation of a flat, fertile flood plain. (v) In deserts, when wind blows, it lifts and transports sand from one place to another. When it stops blowing, the sand particles fall and get deposited in low hill-like structures called sand dunes. (vi) The erosional and depositional activities of the sea waves give rise to different coastal landforms. A beach is one such coastal landform. It is formed when the sea waves deposit sediments along the sea shore. (vii) An ox-bow lake is a crescent-shaped lake formed by a meandering river. During its journey through a plain, a river twists and turns to form meanders. Erosion and deposition occur constantly along the sides of a meander, thereby causing the ends of its loop to come closer and closer. In due course of time, the meander loop cuts off from the river and forms a cut-off, crescent-shaped ox-bow lake.
Q.3: Give reasons.
(i) Some rocks have a shape of a mushroom.
(ii) Flood plains are very fertile.
(iii) Sea caves are turned into stacks.
(iv) Buildings collapse due to earthquakes.
Ans : (i) In deserts, one can see rocks in the shape of a mushroom—with a narrower base and a wider top. These are known as mushroom rocks. Such rocks are formed when the winds erode the lower section of a rock more than the upper part. (ii) Flood plains are formed as a result of the depositional activity of rivers. Rivers carry along with them eroded material like fine soil and sediments. When it overflows its banks, it deposits the eroded material and causes flood plains to be formed. The deposited material makes the land fertile. (iii) Stacks are formed as a result of the erosional activity of the sea waves. When sea waves continuously strike rocks, cracks develop in them. As these cracks become larger and wider, hollow caves get formed on the rocks. These are called sea caves. As the waves keep striking the rocks, the cavities become bigger and bigger, with only the roof remaining at the end. Such structures are known as sea arches. Further erosion breaks the roof, and only walls remain. These wall-like features are known as stacks. Thus, sea caves are ultimately converted into stacks. (iv) Earthquakes are the sudden vibrations caused within the Earth’s surface as a result of the movement of the Lithospheric plates. Such vibrations, when they are of a high intensity, cause damage to the things on the Earth’s surface. Various human-made (e.g., buildings) and natural (e.g., trees) constructions can break down and collapse under the effect of the vibrations because they are situated on the Earth’s surface.
NCERT / CBSE Book for Class 7 Social Science Geography
You can download the NCERT Book for Class 7 Social Science Geography in PDF format for free. Otherwise you can also buy it easily online.
- Click here for NCERT Book for Class 7 Social Science Geography
- Click here to buy NCERT Book for Class 7 Social Science Geography
All NCERT Solutions Class 7
- NCERT Solutions for Class 7 English
- NCERT Solutions for Class 7 Hindi
- NCERT Solutions for Class 7 Maths
- NCERT Solutions for Class 7 Science
- NCERT Solutions for Class 7 Social Science
- NCERT Solutions for Class 7 Sanskrit
All NCERT Solutions
You can also check out NCERT Solutions of other classes here. Click on the class number below to go to relevant NCERT Solutions of Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.
| Class 4 | Class 5 | Class 6 |
| Class 7 | Class 8 | Class 9 |
| Class 10 | Class 11 | Class 12 |
Download the NCERT Solutions app for quick access to NCERT Solutions Class 7 Social Science Geography Chapter 3 Our Changing Earth. It will help you stay updated with relevant study material to help you top your class!
The post NCERT Solutions for Class 7 Social Science (Geography-Our Environment) Chapter 3 Our Changing Earth appeared first on AglaSem Schools.
from AglaSem Schools https://ift.tt/3gCVwyj
https://ift.tt/eA8V8J https://ift.tt/eA8V8J
Post a Comment