🌟 Bricks and Bridges – Class 4 DAV Social Science Book Solution
Welcome to YRS YASRAJ STUDIES! 📚🎓
In this blog, we provide easy and student-friendly solutions for “Bricks and Bridges”, Chapter 5 of the Class 4 DAV Social Science Book. This content is designed to help students understand the chapter clearly, complete their homework, revise important concepts, and prepare confidently for school examinations.
📖 Bricks and Bridges – Class 4 DAV Social Science
Class: 4
Subject: Social Science
Book: DAV Social Science
Chapter: 5
Chapter/Topic: Bricks and Bridges
🌟 What You Will Learn
In this chapter, students will learn about:
- Different types of houses and buildings
- Materials used for construction
- Bricks and their uses
- How houses and buildings are made
- Different types of bridges
- Importance of bridges
- Materials used to build bridges
- How bridges help people travel
- Traditional and modern construction methods
- Importance of strong and safe structures
- Important questions and answers
- DAV Social Science book exercise solutions
- Easy revision notes for Class 4 students
The explanations are written in simple and easy language so that Class 4 students can understand the concepts comfortably and revise them quickly.
📚 DAV Class 4 SST Chapter 5 – Bricks and Bridges
YRS YASRAJ STUDIES
Welcome to YRS YASRAJ STUDIES! 📚🎓
In this blog, we provide complete and easy-to-understand solutions for DAV Class 4 Social Science Chapter 5 – Bricks and Bridges.
The chapter explains different building materials, types of houses, bridges, construction work, tools, workers and safety precautions.
🌟 Something To Know
A. Tick (✓) the Correct Option
Question 1.
Lokhan lives in the state of –
(a) Andhra Pradesh
(b) Arunachal Pradesh
(c) Uttar Pradesh
Answer:
(b) Arunachal Pradesh ✓
Explanation:
Lokhan is a village boy who lives in Arunachal Pradesh.
Question 2.
The material which helps in making a building strong is –
(a) Straw
(b) Mud
(c) Cement
Answer:
(c) Cement ✓
Explanation:
Cement is an important modern building material. It helps to make buildings strong and durable.
Question 3.
Bridges help in the easy movement of –
(a) Vehicles
(b) Valley
(c) River
Answer:
(a) Vehicles ✓
Explanation:
Bridges are built to help people and vehicles cross roads, railways, rivers and other obstacles easily.
Question 4.
The house that uses strong material is –
(a) Tree house
(b) Stilt house
(c) Apartment
Answer:
(c) Apartment ✓
Explanation:
Apartments are generally permanent buildings made using strong materials such as bricks, cement, iron and concrete.
B. Fill in the Blanks
Help Box:
kiln, strong, rope, construction, bamboo
Question 1.
Lokhan went to a __________ site where his father works.
Answer:
construction
Explanation:
Lokhan's father works at a construction site, where buildings and other structures are made.
Question 2.
Bricks are made at a __________.
Answer:
kiln
Explanation:
A kiln is a special furnace where bricks are heated at a high temperature to make them hard and strong.
Question 3.
Ayaan has never crossed a __________ bridge.
Answer:
bamboo
Explanation:
Ayaan is a city boy and has never crossed a bamboo bridge.
Question 4.
The earlier Suspension Bridges were made of wood and __________.
Answer:
rope
Explanation:
Earlier suspension bridges were made using simple materials such as wood and rope.
Question 5.
The development in science and technology has enabled us to construct __________ bridges.
Answer:
strong
Explanation:
Modern science and technology help engineers construct strong and safe bridges.
C. Name the Type of Bridges as per the Given Clues
Across (→)
Question 1.
Earlier, it was made up of wood and rope.
Answer:
Suspension Bridge
Explanation:
Earlier suspension bridges were made using wood and rope.
Question 2.
It uses short cables attached to pillars.
Answer:
Suspension Bridge
Explanation:
Suspension bridges use cables that are connected to supporting structures or pillars.
Down (↓)
Question 3.
It uses truss formations below and above the bridge.
Answer:
Cantilever Bridge
Explanation:
A cantilever bridge supports its load through diagonal bracing and may use truss formations.
Question 4.
It is built across a river.
Answer:
Arch Bridge
Explanation:
An arch bridge has a curved structure and can be constructed across places such as rivers.
D. Answer the Following Questions
Question 1.
List the types of materials used in making a temporary house and a permanent house.
Answer:
A temporary house is made using:
Mud
Thatch
Straw
Bamboo
Wood
A permanent house is made using:
Bricks
Stones
Cement
Iron rods
Glass
Wood
Explanation:
Temporary houses are generally made from materials that are easily available and may not last for a very long time.
Permanent houses use strong and durable materials so that they can remain safe and useful for many years.
Question 2.
Write two benefits of modern building materials.
Answer:
Modern building materials make buildings strong and safe.
They can withstand strong winds better.
Modern building materials make buildings strong and safe.
They can withstand strong winds better.
Explanation:
Materials such as cement, steel and other modern construction materials provide greater strength and durability to buildings.
Question 3.
What is a bridge? How is it useful?
Answer:
A bridge is a structure built over a road, railway, river or another obstacle so that people and vehicles can cross from one side to the other.
Uses of a bridge:
It helps people cross from one side to another.
It allows vehicles to move easily.
It helps in the movement of goods.
It helps people cross from one side to another.
It allows vehicles to move easily.
It helps in the movement of goods.
Explanation:
Without bridges, crossing rivers, railway tracks, valleys and other obstacles may be difficult. Bridges make transportation easier and faster.
Question 4.
Briefly explain any two types of bridges.
Answer:
1. Suspension Bridge
A suspension bridge can cover a long distance. It is made using strong materials such as steel and is supported by cables.
2. Cantilever Bridge
A cantilever bridge supports its load through diagonal bracing. It may use truss or tie-up formations below and above the bridge.
Explanation:
Different bridges are designed according to the place where they are needed and the type of load they have to carry.
Question 5.
Highlight the differences between the lives of Lokhan and Ayaan.
Answer:
| Lokhan | Ayaan |
|---|---|
| Lokhan is a village boy. | Ayaan is a city boy. |
| It is easy for him to cross a bamboo bridge. | He has never crossed a bamboo bridge. |
| He is not familiar with many types of bridges other than the bamboo bridge. | He has seen many types of bridges. |
| He is the son of a worker at the construction site. | He is the son of the manager of the construction site. |
Explanation:
Lokhan and Ayaan have different experiences because they live in different environments. Lokhan is familiar with a bamboo bridge because of his village surroundings, while Ayaan has seen different modern bridges in the city.
🌟 Value-Based Question
A mall is being constructed in Mumbai. People are working day and night to complete the project. Viren, an electrician, was standing on an iron ladder with bare feet. While working, he got an electric shock.
Question 1.
What precautions could Viren have taken before starting his work?
Answer:
Viren should have followed proper electrical safety precautions before starting his work. He should have worn proper protective footwear and safety equipment and ensured that the electrical supply was safely controlled before working.
Explanation:
Electricity can be dangerous. Workers should always use appropriate safety equipment and follow safety rules while working with electrical connections.
Question 2.
What should you do in such an emergency?
Answer:
In case of an electric shock, we should:
Not touch the person directly while they may still be in contact with electricity.
Switch off the electrical supply if it can be done safely.
Immediately call a responsible adult or emergency medical help.
Keep others away from the danger area.
Explanation:
The first priority is safety. Touching someone who is still connected to a live electrical source can put another person in danger.
Question 3.
What is the importance of awareness and responsibility in the performance of our duties?
Answer:
An aware and responsible person can perform his or her duties carefully and safely without unnecessarily risking life.
Explanation:
Awareness helps us understand possible dangers, while responsibility encourages us to follow safety rules and protect ourselves and others.
🗺️ Map Skill
Question:
On a political map of India, mark the states where the following bridges are located:
Lakshman Jhula
Howrah Bridge
Golden Bridge
Bandra Sea Link Bridge
Answer:
Lakshman Jhula – Uttarakhand
Howrah Bridge – West Bengal
Golden Bridge – Gujarat
Bandra Sea Link Bridge – Maharashtra
Lakshman Jhula – Uttarakhand
Howrah Bridge – West Bengal
Golden Bridge – Gujarat
Bandra Sea Link Bridge – Maharashtra
Explanation:
This activity helps students locate important bridges and understand their geographical locations in India.
✏️ Something To Do
Question 1.
Delhi Metro Rail Corporation is working on extending the metro rail network across the city of Delhi. List the people involved in making a metro bridge.
(a) Engineer
(b) Mason
(c) __________
(d) __________
(e) __________
(f) __________
(g) __________
(h) __________
Answer:
(a) Engineer
(b) Mason
(c) Architect
(d) Glazier
(e) Welder
(f) Labourer
(g) Electrician
(h) Contractor
Explanation:
Construction projects require the combined work of many skilled people. Engineers, architects, masons, electricians, labourers and other workers perform different jobs to complete a project successfully.
Question 2.
Identify the types of bridges:
(a) B_A_ bridge
Answer:
BEAM BRIDGE
Explanation:
A beam bridge uses horizontal beams supported at its ends.
(b) A_H_ bridge
Answer:
ARCH BRIDGE
Explanation:
An arch bridge has a curved arch-shaped structure that supports the bridge.
🛠️ Question 3.
Look at some pictures of tools. Name any four tools used by a carpenter, painter, tailor, electrician, mason and plumber.
Answer:
| Carpenter | Painter | Tailor | Electrician | Mason | Plumber |
|---|---|---|---|---|---|
| Hammer | Brush | Sewing machine | Screwdriver | Gauge | Thread |
| Axe | Trowel | Scissors | Screw | Trowel | Hammer |
| Auger | Ladder | Tape | Chisel | Hammer | Clamp |
| Anvil | — | Needle | Drill | — | — |
Explanation:
Different workers use different tools according to the type of work they perform. For example, a carpenter uses a hammer, a tailor uses a sewing machine, an electrician uses a screwdriver, and a mason uses a trowel.
🌉 Question 4.
Which type of bridges should be constructed at the following places and why?
| Place | Type of Bridge | Reason |
|---|---|---|
| (a) Between mountains | Suspension Bridge | It can cover a long distance. |
| (b) Across a river | Cantilever Bridge | It supports the load through diagonal bracing. |
| (c) To ease road traffic | Flyover | It helps ease the movement of traffic. |
Explanation:
(a) Between mountains – Suspension Bridge
A suspension bridge is suitable for covering a long distance, such as a wide gap between mountains.
(b) Across a river – Cantilever Bridge
A cantilever bridge can support its load through diagonal bracing.
(c) To ease road traffic – Flyover
A flyover allows vehicles to pass above busy roads and intersections, helping to reduce traffic congestion.
📚 Quick Revision Notes
Bricks are used for constructing permanent buildings.
Cement helps make buildings strong.
Kilns are used for making bricks.
Temporary houses may use mud, straw, bamboo and wood.
Permanent houses use stronger materials such as bricks, cement, stones and iron rods.
A bridge helps people and vehicles cross an obstacle.
Suspension bridges can cover long distances.
Cantilever bridges use diagonal bracing to support loads.
Beam bridges use beams as their main supporting structure.
Arch bridges have an arch-shaped structure.
Many different workers and professionals are needed for construction.
Safety and responsibility are very important at construction sites.
Bricks are used for constructing permanent buildings.
Cement helps make buildings strong.
Kilns are used for making bricks.
Temporary houses may use mud, straw, bamboo and wood.
Permanent houses use stronger materials such as bricks, cement, stones and iron rods.
A bridge helps people and vehicles cross an obstacle.
Suspension bridges can cover long distances.
Cantilever bridges use diagonal bracing to support loads.
Beam bridges use beams as their main supporting structure.
Arch bridges have an arch-shaped structure.
Many different workers and professionals are needed for construction.
Safety and responsibility are very important at construction sites.
🌟 Learn • Practice • Revise • Succeed! 📚🎓
YRS YASRAJ STUDIES
🧱 What Are Bricks?
Bricks are important building materials used for constructing houses, walls, schools and many other buildings.
Bricks are generally made from clay and are baked in kilns to make them hard and strong.
Bricks are commonly used because they are strong and suitable for construction.
🏠 Uses of Bricks
Bricks are used to make:
- Houses
- Walls
- Schools
- Buildings
- Roads
- Boundary walls
- Other structures
Different materials may be used along with bricks to make buildings stronger and safer.
🌉 What Is a Bridge?
A bridge is a structure built over a river, road, railway line, valley or other obstacle to help people and vehicles cross from one side to another.
Bridges make transportation easier and save travel time.
🌉 Types of Bridges
There are different types of bridges.
1. Beam Bridge
A beam bridge has a horizontal structure supported by pillars or supports.
2. Arch Bridge
An arch bridge has one or more curved arches that support the structure.
3. Suspension Bridge
A suspension bridge is supported by strong cables and towers.
Different bridges are designed according to the place, purpose and weight they need to carry.
🏗️ Materials Used to Build Bridges
Different materials can be used to construct bridges, such as:
- Bricks
- Stone
- Wood
- Steel
- Cement
- Concrete
Modern bridges often use strong materials such as steel and concrete.
🚗 Importance of Bridges
Bridges are very useful because they:
- Help people cross rivers and other obstacles.
- Make transportation easier.
- Connect villages, towns and cities.
- Reduce travel distance and time.
- Help vehicles and trains move from one place to another.
- Support trade and communication.
🏗️ Strong and Safe Structures
Buildings and bridges should be strong and safe.
While constructing a structure, builders need to consider:
- Strength of materials
- Design of the structure
- Location
- Weight the structure will carry
- Safety of people using it
Strong construction helps protect people and property.
🌟 Bricks and Bridges in Our Daily Life
We see bricks and bridges around us every day.
Bricks are commonly used in houses, schools and walls. Bridges help us cross rivers, roads, railway tracks and valleys.
Both are important parts of our built environment.
📚 Important Questions and Answers
1. What are bricks?
Bricks are building materials, generally made from clay and baked to make them hard and strong.
2. Where are bricks used?
Bricks are used for constructing houses, walls, schools, buildings and many other structures.
3. What is a bridge?
A bridge is a structure built over an obstacle such as a river, road or railway line to help people and vehicles cross it.
4. Why are bridges important?
Bridges are important because they connect places and make transportation easier and faster.
5. Name some materials used for building bridges.
Some materials used for building bridges are stone, wood, steel, bricks, cement and concrete.
6. Name three types of bridges.
Three types of bridges are:
- Beam bridge
- Arch bridge
- Suspension bridge
7. How do bridges help us?
Bridges help people and vehicles cross rivers, roads, railway lines and other obstacles easily.
8. Why should buildings and bridges be strong?
Buildings and bridges should be strong to ensure the safety of people and to prevent damage or collapse.
📝 Quick Revision Notes
Remember:
Bricks → Building Material
Bridge → Helps Us Cross Obstacles
- Bricks are commonly used for construction.
- Bricks are generally made from clay.
- Bridges connect places separated by obstacles.
- Bridges help people and vehicles travel easily.
- Bridges can be made using stone, wood, steel, concrete and other materials.
- Different types of bridges are designed for different purposes.
- Strong and safe construction is very important.
📚 Class 4 DAV Social Science Book Solutions
This blog is useful for Class 4 DAV students, parents, and teachers who are looking for simple study material, homework help, revision notes, and DAV Social Science book solutions.
Students can use these notes to:
- Understand the chapter easily
- Complete their homework
- Revise important concepts
- Prepare for class tests
- Prepare for school examinations
🎯 Why Read This Blog?
Here are some useful features of our Class 4 DAV Social Science solutions:
- Easy-to-understand explanations
- Chapter-wise learning support
- Important questions and answers
- Quick revision notes
- Helpful for DAV school examinations
- Simple and student-friendly language
🌟 Learn • Practice • Revise • Succeed!
For more Class 4 Science, Maths, English, Social Science, and DAV syllabus solutions, keep following YRS YASRAJ STUDIES.
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