NCERT Solutions Class 7 Social Science Chapter 3 Our Changing Earth have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 7 Social Science have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 7 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 7 Social Science are an important part of exams for Class 7 Social Science and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 7 Social Science and also download more latest study material for all subjects. Chapter 3 Our Changing Earth is an important topic in Class 7, please refer to answers provided below to help you score better in exams
Chapter 3 Our Changing Earth Class 7 Social Science NCERT Solutions
Class 7 Social Science students should refer to the following NCERT questions with answers for Chapter 3 Our Changing Earth in Class 7. These NCERT Solutions with answers for Class 7 Social Science will come in exams and help you to score good marks
Chapter 3 Our Changing Earth NCERT Solutions Class 7 Social Science
NCERT Solutions for Class 7 for Social Science Geography Chapter 3 Our Changing Earth
1. Answer the following questions:
(i) Why do plates move?
Ans. Plates move because of the movement of molten magma inside the earth. The molten magma moves inside the earth in a circular manner.
(ii) What are exogenic and endogenic forces?
Ans. The forces which act on the surface of the earth are known as exogenic forces, whereas the forces which act in the interior of the earth are known as endogenic forces.
(iii) What is erosion?
Ans. The wearing away of landscape by different agent of nature like wind, water, and ice is known as erosion.
(iv) How are flood plains formed?
Ans. Layers of fine soil and other materials known as sediments are deposited along the banks of river, whenever a river floods. This leads to the formation of a fertile floodplain.
(v) What are sand dunes?
Ans. When the wind blows in a desert, it transports sand from one place to another. When it stops blowing, the sand falls and gets deposited in low hill-like structures, which are known as sand dunes.
(vi) How are beaches formed?
Ans. Beaches are formed when sediments carried by the sea waves are deposited along the shores. The finer sediments are deposited near the sea, while the coarser ones are deposited further inland.
(vii) What are ox bow lakes?
Ans. Rivers start meandering when they enter the plains. In due course of time, the meander loop cuts off from the river and forms a cut-off lake, which is also known as an ox bow lake.
2. Tick the correct answer.
(i) Which is not an erosional feature of sea waves?
(a) Cliff (b) Beach (c) Sea cave
(ii) The depositional feature of a glacier is:
(a) Flood plain (b) Beach (c) Moraine
(iii) Which is caused by the sudden movements of the earth?
(a) Volcano (b) Folding (c) Flood plain
(iv) Mushroom rocks are found in:
(a) Deserts (b) River valleys (c) Glaciers
(v) Ox bow lakes are found in:
(a) Glaciers (b) River valleys (c) Deserts
3. Match the following.
(i) Glacier (a) Sea shore
(ii) Meanders (b) Mushroom rock
(iii) Beach (c) River of ice
(iv) Sand dunes (d) Rivers
(v) Waterfall (e) Vibrations of earth
(vi) Earthquake (f) Sea cliff
(g) Hard bed rock
(h) Deserts
Ans.
(i) Glacier (c) River of ice
(ii) Meanders (d) Rivers
(iii) Beach (a) Sea shore
(iv) Sand dunes (h) Deserts
(v) Waterfall (g) Hard bed rock
(vi) Earthquake (e) Vibrations of earth
4. Give reasons.
(i) Some rocks have a shape of mushroom.
Ans. Erosion of rocks in a desert by wind progresses at a different rate at its bottom to that at its top. Winds erode lower section of rocks more than the upper section. Thus, rocks take the shape of a mushroom, i.e., narrower at the base and wider at the top.
(ii) Flood plains are very fertile.
Ans. Flood plains are formed due to depositional activity of rivers. Sometimes, the rivers flood and layers of fine sediments and other materials are deposited along its banks. This causes floodplains to be formed. The deposited sediments and other materials make the land fertile.
(iii) Sea caves are turned into stacks.
Ans. Continuous striking of sea waves against the rocks causes the rocks to develop hollow like caves on them. These hollows are known as sea caves. They become larger and larger due to continuous erosion, leaving the cave with only a roof, thus forming sea arches. Further erosion breaks the roof and only walls are left. These wall like structures are known as stacks.
(iv) Buildings collapse due to earthquakes.
Ans. An earthquake is a sudden release of energy from the earth’s crust that travels in waves. When the intensity of earthquake is high, it can cause damage to many man-made and natural things on the surface of the earth. Buildings can collapse when they cannot stand the intensity of earthquake.
5. Activity.
Observe the photographs given below. These are various features made by a river. Identify them and also tell whether they are erosional or depositional or landforms formed by both.
6. For fun.
Solve the crossword puzzle with the help of given clues.
Across:
2. Loop like the bend of a river: Meander
4. Solid form of water: Ice
7. Moving mass of ice: Glacier
9. Sudden descent of water in the bed of a river: Waterfall
11. Natural cavity on weak rocks formed by the action of waves: Cave
12. Embankment on a river that keeps it in its channel: Levee
13. Large body of water: Sea
14. Dry area where sand dunes are found: Desert
15. Small hill of sand caused by the action of wind: Sand dune
16. Flat plain formed by river deposits during time of flood: Floodplain
Down:
1. Rise and fall of water caused by friction of wind on water surface: Wave
3. Flow of water in a channel: River
5. Steep perpendicular face of a rock along a sea coast: Cliff
6. Debris of boulder and coarse material carried by glacier: Moraine
8. Crescent shaped lake formed by a meandering river: Oxbow lake
10. Fine sand deposited by the action of wind: Loess
13. Isolated mass of rising steep rock near a coastline: Stack
14. Alluvial tracts of land formed by the river deposits at the mouth of a river: Delta
NCERT Solutions Class 7 Social Science Chapter 1 Environment |
NCERT Solutions Class 7 Social Science Chapter 2 Inside Our earth |
NCERT Solutions Class 7 Social Science Chapter 3 Our Changing Earth |
NCERT Solutions Class 7 Social Science Chapter 4 Air |
NCERT Solutions Class 7 Social Science Chapter 5 Water |
NCERT Solutions Class 7 Social Science Chapter 6 Natural Vegetation and Wildlife |
NCERT Solutions Class 7 Social Science Chapter 7 Human Environment Settlement Transport Communication |
NCERT Solutions Class 7 Social Science Chapter 8 Human Environment Interactions The Tropical And The Subtropical Region |
NCERT Solutions Class 7 Social Science Chapter 9 Life in the Deserts |
NCERT Solutions Class 7 Social Science Chapter 1 Tracing Changes Through A Thousand Years |
NCERT Solutions Class 7 Social Science Chapter 2 New Kings and Kingdoms |
NCERT Solutions Class 7 Social Science Chapter 3 The Delhi Sultans |
NCERT Solutions Class 7 Social Science Chapter 4 The Mughal Empire |
NCERT Solutions Class 7 Social Science Chapter 5 Rulers and Buildings |
NCERT Solutions Class 7 Social Science Chapter 6 Towns Traders and Craftspersons |
NCERT Solutions Class 7 Social Science Chapter 7 Tribes Nomads and Settled Communities |
NCERT Solutions Class 7 Social Science Chapter 8 Devotional Paths to the Divine |
NCERT Solutions Class 7 Social Science Chapter 9 The Making of Regional Cultures |
NCERT Solutions Class 7 Social Science Chapter 10 Eighteenth Century Political Formations |
NCERT Solutions Class 7 Social Science Chapter 1 On Equality |
NCERT Solutions Class 7 Social Science Chapter 3 How the State Government Works |
NCERT Solutions Class 7 Social Science Chapter 4 Growing up as Boys and Girls |
NCERT Solutions Class 7 Social Science Chapter 5 Women Change the World |
NCERT Solutions Class 7 Social Science Chapter 6 Understanding Media |
NCERT Solutions Class 7 Social Science Chapter 7 Markets around Us |
NCERT Solutions Class 7 Social Science Chapter 8 A Shirt in the Market |
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NCERT Solutions Class 7 Social Science Chapter 3 Our Changing Earth
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Chapter 3 Our Changing Earth Class 7 Social Science NCERT Solutions
The Class 7 Social Science NCERT Solutions Chapter 3 Our Changing Earth are designed in a way that will help to improve the overall understanding of students. The answers to each question in Chapter 3 Our Changing Earth of Social Science Class 7 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 3 Our Changing Earth Class 7 chapter of Social Science so that it can be easier for students to understand all answers.
NCERT Solutions Chapter 3 Our Changing Earth Class 7 Social Science
Class 7 Social Science NCERT Solutions Chapter 3 Our Changing 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 7 Social Science exam. Learn the Chapter 3 Our Changing Earth questions and answers daily to get a higher score. Chapter 3 Our Changing Earth of your Social Science 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 Social Science teachers on studiestoday to get better problem-solving skills.
Chapter 3 Our Changing Earth Class 7 NCERT Solution Social Science
These solutions of Chapter 3 Our Changing Earth NCERT Questions given in your textbook for Class 7 Social Science have been designed to help students understand the difficult topics of Social Science in an easy manner. These will also help to build a strong foundation in the Social Science. There is a combination of theoretical and practical questions relating to all chapters in Social Science to check the overall learning of the students of Class 7.
Class 7 NCERT Solution Social Science Chapter 3 Our Changing Earth
NCERT Solutions Class 7 Social Science Chapter 3 Our Changing Earth detailed answers are given with the objective of helping students compare their answers with the example. NCERT solutions for Class 7 Social Science provide a strong foundation for every chapter. They ensure a smooth and easy knowledge of Revision notes for Class 7 Social Science. 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 7 Social Science to clarify all doubts
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