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

Q:

Solve the crossword puzzle with the help of given clues. Across: 2. Loop like the bend of a river 4. Solid form of water 7. Moving mass of ice 9. Sudden descent of water in the bed of a river 11. Natural cavity on weak rocks formed by the action of waves 12. Embankment on a river that keeps it in its channel 13. Large body of water 14. Dry area where sand dunes are found 15. Small hill of sand caused by the action of wind 16. Flat plain formed by river deposits during time of flood Down: 1. Rise and fall of water caused by friction of wind on water surface 3. Flow of water in a channel 5. Steep perpendicular face of a rock along a sea coast 6. Debris of boulder and coarse material carried by glacier 8. Crescent shaped lake formed by a meandering river 10. Fine sand deposited by the action of wind 13. Isolated mass of rising steep rock near a coastline 14. Alluvial tracts of land formed by the river deposits at the mouth of a river

A:

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

Q:

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.

A:

Q:

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.

A:

(i) 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 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) 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)  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.

Q:

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

A:

(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

Q:

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

A:

  (i) (b) Beach   ✓
 (ii) (c) Moraine ✓
(iii) (a) Volcano ✓
 (iv) (a) Deserts ✓
  (v) (b) River valleys ✓

Q:

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?

A:

(i) Plates move because of the movement of molten magma inside the earth. The molten magma moves inside the earth in a circular manner.

(ii)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)The wearing away of landscape by different agent of nature like wind, water, and ice is known as erosion.

(iv) 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) 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) 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) 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.

Benefits of NCERT Solutions

Following are some of the benefits of using NCERT Solutions by Extramarks.

1. The NCERT solutions for class 7 are prepared keeping in mind the necessary rules and format issued by the CBSE board thus providing students much-needed preview of the exam pattern of questions and preview of the exam that they are going to face during the final exams.

2. The students can be sure about the quality of the solutions as they are committed by highly experienced and expert teachers. These teachers have years of experience and they make sure that there is no mistake committed when preparing the solutions.

3. The NCERT 7 solutions are provided for the questions that are most likely to appear in the exam thus improving the efficiency of the students by helping them prepare for the important parts of the syllabus.

Tips & Strategies for Class 7 Exam Preparation

1. Start your revision early so you can revise well and grasp all the difficult concepts.

2. Organize your study time by making a timetable as it will help you manage your time accordingly.

3. Take mock tests and solve sample papers as they will help you learn time management during the exam and make you familiar with the exam pattern.

4. Take regular breaks, look after yourself by sleeping properly and eating well.

5. Know your exam well, explore the mock tests, and practice sample papers as much as you can.

Why Choose Extramarks CBSE Class 7 Study Materials?

1. The solutions have been compiled keeping in mind the purpose of scoring high marks in exams thus they have everything that the students need to prepare for exams.
2. The NCERT solutions for class 7 are designed in a clear and simple language complete with diagrams so that the students understand the subject well.
3. The NCERT 7 solutions are accurate thus improving their reliability.
4. The solutions are designed by expert and experienced teachers that help in removing all doubts out of the solutions and improving the credibility of the answers.

Frequently Asked Questions

product
Is class 7 Math NCERT book sufficient for prepare for the exams?

Yes, the NCERT book has been designed keeping in mind the pattern of paper that will be presented in the exam to students. The NCERT book is sufficient to study for the exam as it has everything related to the exam and contains all information out of which the questions will be asked in the exam. But if you want to prepare a little bit extra, we suggest that you go through the NCERT class 7 solutions.

When to refer to NCERT solutions for class 7th?

When you are studying the NCERT book for math and other subjects for your class 7 exams, refer to the NCERT class 7 solutions simultaneously so you can see where you are going wrong and what are you getting right in your exercises’ attempt.

Why are the NCERT solutions important for Class 7th?

The class 7th is very crucial as it is among the major middle school classes during which the child’s base is formed in math and science and even in other subjects like English. Thus, it is students must study smartly in this class and ace their exams while getting all the help they need from the NCERT 7 solutions given by Extramarks.

Can I rely on the NCERT solutions for class 7 Math at Extramarks to perform well in the annual exam?

Yes, absolutely. The NCERT solutions provided by Extramarks for class 7 are eloquent and elaborate at best and are thus useful for students studying for the final exams of class 7. The students will have many questions and doubts regarding the NCERT solutions for class 7 and this is why the solutions have been elaborated well to help students understand the answers to exercises.

Do you provide NCERT solutions for Class 7 Math for free?

Yes, the NCERT solutions for Math and other subjects for class 7 are available for free from Extramarks.

Start Your
7-Days Free Trial
and experience it yourself
Start Trial
Play StoreApp Store
Flying Girl
A subscription
that’s worth your
money
Get the best classroom experience on
India’s leading learning platform

Get
in touch

Have a query about our services?
Get in touch with us and we will
guide you through a new world of
redefined learning

Union
Get OTP
Submit