Class 8

Get the customized Learning ventures that adjust to each studentโ€™s Learning prerequisite.

About Class 8 Program

Edusaksham provides visual and interesting exercises to clarify complex ideas with regards to numerical issues. The concepts instructed in class eighth of CBSE are firmly related to the ideas showed later on in class ninth. Edusaksham class 8 course enables the focus to board tests and other further selection tests like Maths, Science Olympiads and NTSE without any difficulty. Top quality representation methods empower markable enthusiasm for Learning science.

Edusaksham platform connects youthful personalities and students in which a subject video addresses student enthusiasm towards the subject and Learning capacity of the student. In CBSE Class 8 for Maths and Science, more consistent models are utilized for explaining complex ideas making simple Learning. Reasonable learning helps students have an edge over others later on while planning for board tests. Edusaksham enables the parents to understand the effect of the classes and how they are profiting by the item.

Edusaksham provides chapter wise tests with complete solutions, explanation with clarifications. We treat a few inquiries as a piece of the Learning itself, as you experience recordings for solving CBSE class 8 Mathematics and Science worksheets. It guarantees that the student isn't just getting ideas yet additionally applying it.

Our Approach

Personalized Learning

EduSaksham offers a completely personalized learning experience for every user. The system provides a unique learning experience for the user and helps them learn the concepts at their level. User can complete the lessons at his own pace and access it from anywhere on the go. Each user gets his own dashboard which helps track his performance and progress. User can access any lesson at any point of time based on his own learning needs. The system is designed in a way to support learning at every stage for every individual learner.

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Self-Paced Learning

EduSaksham provides self-paced learning courses. Users can learn the lessons at their own pace and are not left behind for any of the lessons. Each user on the platform has his own profile where content is presented to the user based on his choice. The user gets access to the entire content, and then the user can decide which lesson he wants to learn. If a learner is not able to understand the concept in one go, he has full control to playback the lessons. Moreover, the end-user may attempt any quiz multiple times until his concepts are clear.

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Modular Course Structure

The entire course structure is created in a modular structure for all the courses to enhance better learning for the students. Students learn one concept at a time. We have created smaller modules for the students so they can watch/read/practice the lessons as per their attention level. If a student wants to do more, then he can move on to the next experience quickly. Modular course structure also helps students identify their strengths and weaknesses per topics, which helps improve the overall performance of the students.

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Extensive Experimental Concepts

All our courses include a lot of experimental ideas to make students understand the topics very easily. We use our day to day life objects to draw parallels to the concepts and make students learn from our surrounding. Our science courses use a lot of experiments for the students to make the visualizations stronger for the ideas as visual memory helps them retain the concept for the more extended period. We innovatively bring our courses closer to the real life so students can learn better with their daily objects.

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Advanced Analytics

EduSaksham offers advanced analytics and reporting to every student. Our analytics help student identifies their strengths and weaknesses and helps them work on them. Our in-depth analysis helps a student identify their mistakes, areas of concern, topic-level, proficiency level, etc. We provide a lot of analytics on time management for the assessments, questions, comparative analysis, among other students to help students understand their performance. It helps in remediate or accelerate their learning and achievement.

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Quick Exam Revision

EduSaksham has provided students with excellent smart exam revision modules which help students quickly cover essential points from the chapter and get prepared fast. It will help students revise any topic quickly and practice the questions topic-wise for the chapters. These modules cover all the salient points of the chapters in a quick summary video, mind map-based notes, and a variety of good questions. These offerings help students prepare better for the exams and increase their performance.

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Doubt Clarification

EduSaksham course modules provide access to any lessons at any point in time. In case a student faces any doubt in any of the content, he can share his queries to us over our forum. Our experts will get back to him within no time. We provide complete detailed explanations for all the questions so students can get their doubts clarified instantly. Each description also links the concepts used within the problem, so if a student feels to check the content, he can directly visit the content and get his doubt clarified.

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Discussion Forum

We offer a discussion forum for students to discuss their queries if they have any. Our experts revert to the student queries and help them resolve their doubts. Fellow students can also help each other to clarify their doubts. Discussion forum helps build student community where they can learn from each other. Forum creates healthy learning environment among students. It also makes a repository of queries for the students to refer to any time in the future and get their doubts clarified on the runtime.

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Class 8 Subject

Math

  • 100+ E-Learning Videos
  • 100 Conceptual Notes for Class 8 maths
  • 300+ self-indulging friendly worksheets
  • 2200+ Questions
  • Detailed Explanations for each question
  • Difficulty Levels viz. for each test
See the Complete Details Buy Now

Features of the Course :

โ€ข Exhaustive practice tests
โ€ข Friendly self-indulging worksheets
โ€ข Progressive Practice patterns
โ€ข Personalized Learning Dashboard
โ€ข Concept-wise Analytics
โ€ข Instant feedback mechanism
โ€ข All India comparison of progress
โ€ข Unlimited attempts


Benefits of the Course :

โ€ข Improved performance โ€“ With our scientifically designed content significant improvements in performance will be attained.
โ€ข Attain the desired IQ โ€“ Get the desired IQ in 8th class mathematics with our exhaustive maths models for class 8 CBSE.
โ€ข Easy tracking of progress โ€“ We provide easy tracking facility to help you understand how you are progressing with every step in the course.
โ€ข Self-paced learning โ€“ Every individual has a different learning pace. Keeping that in mind, we have designed the course to be self-paced.
โ€ข Identify focus areas โ€“ Students may be better in certain concepts than others. This course will facilitate them for a better understanding of the areas where they need to focus more.
โ€ข Build strong foundations โ€“ With this course, we aim to help a child understand every concept of the subject so that their foundation in mathematics becomes very strong.
โ€ข Simple parentโ€™s supervision โ€“ Parents will be able to monitor their childrenโ€™s performance easily with the features provided in the course.
โ€ข Quick re-learning โ€“ Even if a child fails at solving a problem, they will be able to solve the problems again till they get it, thus allowing room for re-learning.


Courses Offered :

โ€ข Class 8 โ€“ Maths - Part 1 (293 lessons)
โ€ข Class 8 โ€“ Maths โ€“ Part 2 (256 lessons)
โ€ข Class 8 โ€“ Exam Revision


Syllabus :
  • Chapter 1 - RATIONAL NUMBER
  • Chapter 2 - LINEAR EQUATION IN ONE VARIABLE
  • Chapter 3 - UNDERSTANDING QUADRILATERALS
  • Chapter 4 - PRACTICAL GEOMETRY
  • Chapter 5 - DATA HANDLING
  • Chapter 6 - SQUARE AND SQUARE ROOTS
  • Chapter 7 - CUBES AND CUBE ROOTS
  • Chapter 8 - COMPARISON QUANTITIES
  • Chapter 9 - ALGEBRAIC EXPRESSION AND IDENTITIES
  • Chapter 10 - VISUALIZING SOLID SHAPES
  • Chapter 11 - MENSURATION
  • Chapter 12 - EXPONENTS AND POWERS
  • Chapter 13 - DIRECT AND INVERSE PROPERTIES
  • Chapter 14 - FACTORISATION
  • Chapter 15 - INTRODUCTION TO GRAPHS
  • Chapter 16 - PLAYING WITH NUMBERS

Detailed Syllabus :
1. Rational Numbers
1.1 Introduction to rational number
1.2 Properties of Rational Numbers
1.2.1 Closure
1.2.2 Commutativity
1.2.3 Associativity
1.2.4 The Role of Zero
1.2.5 The Role of 1
1.2.6 Negative of a number
1.2.7 Reciprocal
1.3 Representation of Rational Numbers on the Number Line
1.4 Rational Number between Two Rational Numbers

2. Linear Equation in One Variable
2.1 Linear Equations in One Variable โ€“ Introduction
2.2 Linear Equations in One Variable
2.2.1 Solving Equations which have Linear Expressions on one side and Numbers on the other side
2.2.2 Solving Equations having the Variable on both sides
2.2.3 Reducing Equations to simpler form
2.2.4 Equations reducible to the Linear Form

3 Understanding Quadrilaterals
3.1 Introduction
3.2 Polygon
3.2.1 Classification of Polygons
3.2.2 Diagonals
3.2.3 Convex and concave polygons
3.2.4 Regular and irregular polygons
3.2.5 Angle sum property
3.3 Sum of the Measures of the Exterior Angles of a Polygon
3.4 Types of Quadrilaterals
3.4.1 Trapeziums
3.4.2 Kite
3.4.3 Parallelogram
3.4.4 Elements of a parallelogram
3.4.5 Angles of a parallelogram
3.4.6 Diagonals of a parallelogram
3.5 Special Parallelograms
3.5.1 Rhombus
3.5.2 A Rectangle
3.5.3 A Square

4 Practical Geometry
4.1 Constructing a Quadrilateral
4.1.1 When the lengths of four sides and a diagonal are given
4.1.2 When two diagonals and three sides are given
4.1.3 When two adjacent sides and three angles are known
4.1.4 When three sides and two included angles are given
4.2 Some Special Cases

5 Data Handling
5.1 Introduction
5.2 Organising Data
5.3 Grouping Data
5.3.1 Grouping Data
5.3.2 Bars with a difference
5.4 Circle Graph or Pie Chart
5.4.1 Circle Graph or Pie Chart
5.4.2 Drawing pie charts
5.5 Chance and Probability
5.5.1 Getting a result
5.5.2 Equally likely outcomes:
5.5.3 Linking chances to probability
5.5.4 Outcomes as events
5.5.5 Chance and probability related to real life

6 Square and Square Root
6.1 Introduction to Square Roots
6.2 Properties of Square Numbers
6.3 Some More Interesting Patterns
6.4 Finding the Square of a Number
6.4.1 Finding the Square of a Number
6.4.2 Other patterns in squares
6.4.3 Pythagorean triplets
6.5 Square Roots
6.5.1 Finding square roots
6.5.2 Finding square root through repeated subtraction
6.5.3 Finding square root through prime factorisation
6.5.4 Finding square root by division method
6.6 Square Roots of Decimals
6.7 Estimating Square Root

7 Cubes and Cube Root
7.1 Cubes
7.1.1 Cubes
7.1.2 Some Interesting Patterns
7.1.3 Smallest multiple that is a perfect cube
7.2 Cube Roots
7.2.1 Cube Roots
7.2.2 Cube root through prime factorisation method
7.2.3 Cube root of a cube number
7.3 Cube Roots - Cube root using unit digit method

8 Comparing Quantities
8.1 Comparing Quantities
8.1.1 Recalling Ratios and Percentages
8.1.2 Finding the Increase or Decrease Per cent
8.1.3 Finding Discounts
8.1.4 Estimation in percentages
8.2 Prices Related to Buying and Selling (Profit and Loss)
8.3 Sales Tax/Value Added Tax
8.4 Compound Interest
8.4.1 Compound Interest
8.4.2 Deducing a Formula for Compound Interest
8.4.3 Rate Compounded Annually or Half Yearly (Semi Annually)
8.4.4 Applications of Compound Interest Formula

9 Algebraic Expression and Identities
9.1 What are Expressions?
9.2 Terms, Factors and Coefficients
9.3 Monomials, Binomials and Polynomials
9.4 Like and Unlike Terms
9.5 Addition and Subtraction of Algebraic Expressions
9.6 Multiplication of Algebraic Expressions
9.6.1 Multiplying a Monomial by a Monomial
9.6.2 Multiplying two monomials
9.6.3 Multiplying three or more monomials
9.6.4 Multiplying a Monomial by a Polynomial
9.6.5 Multiplying a monomial by a binomial
9.6.6 Multiplying a monomial by a trinomial
9.6.7 Multiplying a Polynomial by a Polynomial
9.6.8 Multiplying a binomial by a binomial
9.6.9 Multiplying a binomial by a trinomial
9.7 Identities
9.7.1 Standard Identities
9.7.2 Applying Identities

10 Visualizing Solid Shape
10.1 Introduction
10.2 Views of 3D-Shapes
10.3 Mapping Space around Us
10.4 Faces, Edges and Vertices

11 Mensuration
11.1 Mensuration โ€“ Introduction
11.2 Area of Trapezium
11.3 Area of a General Quadrilateral
11.4 Area of a Polygon
11.5 Surface Area
11.5.1 Cuboid
11.5.2 Cube
11.5.3 Cylinder
11.6 Volume
11.6.1 Cuboid
11.6.2 Cube
11.6.3 Cylinder
11.7 Volume and Capacity

12 Exponents and Powers
12.1 Exponents & Powers
12.2 Powers with Negative Exponents
12.3 Laws of Exponents
12.4 Use of Exponents to Express Small Numbers in Standard Form
12.4.1 Use of Exponents to Express Small Numbers in Standard Form
12.4.2 Use of Exponents to Express Small Numbers in Standard Form - Comparing very large and very small numbers

13 Direct and Inverse Proportion
13.1 Direct Proportions
13.2 Inverse Proportions

14 Factorization
14.1 Factorization
14.1.1 Factors of natural numbers
14.1.2 Factors of algebraic expressions
14.1.3 Method of common factors
14.1.4 Factorisation by regrouping terms
14.1.5 Factorisation using identities
14.1.6 Factors of the form ( x + a) ( x + b)
14.2 Division of Algebraic Expressions
14.2.1 Division of a monomial by another monomial
14.2.2 Division of a polynomial by a monomial
14.3 Division of Algebraic Expressions Continued (Polynomial รท Polynomial)
14.4 Can you Find the Error?

15 Introduction to Graphs
15.1 Introduction to Graphs
15.1.1 A Bar Graph
15.1.2 A Pie graph (or a circle-graph)
15.1.3 A histogram
15.1.4 A line graph
15.2 Linear Graphs
15.2.1 Location of a point
15.2.2 Coordinates
15.3 Application of Graphs

16 Playing with Numbers
16.1 Playing with Numbers
16.1.1 Numbers in General Form
16.1.2 Games with Numbers
16.1.3 Letters for Digits
16.2 Tests of Divisibility
16.2.1 Divisibility by 10
16.2.2 Divisibility by 5
16.2.3 Divisibility by 2
16.2.4 Divisibility by 9 & 3
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Science

  • 180+ Worksheets
  • 1800+ Questions
  • 100+ notes of formulas and concepts
  • Detailed explanations with every question
  • Different difficulty levels for each test (Easy, Medium, and Hard)
See the Complete Details Buy Now

About Course :

Through our e-learning course, we have made sincere attempts to build interest and hone the skills of every student towards Mathematics. Olympiad course is a continuation of our Math course which student can go through to cement its learning of every topic. We ensure to provide enough situations and scenarios through our practice questions for in-depth learning and thinking to begin from the formative years.

We provide worksheets to help students evaluate themselves and learn from their mistakes. Each question also comes with answers. These answers are intended to provide students with a clearer understanding of every concept in detail.

Students who have referred to our class 7 Maths course in the past have shown significant improvements in their overall marks as well as ease of understanding the concepts. Many of the users of this course have cleared the levels of Olympiad exam easily.


Pedagogy :

Through our e-learning course, we have made sincere attempts to build interest in the child towards Science. We are teaching the basics of all the topics and its applications in real life situations. We also ensure to provide enough situations and scenarios through our practice questions for in-depth learning and thinking to begin from the formative years. Every chapter of the subject has been meticulously designed by subject experts who have years of experience in the field of academics. We also provide worksheets to help students evaluate themselves and learn from their mistakes. Each question also comes with answers. These answers are intended to provide students with a clearer understanding of every concept in detail.


Features of the Course :

โ€ข Exhaustive practice tests
โ€ข Unlimited attempts
โ€ข Friendly self-indulging worksheets
โ€ข Progressive practice patterns
โ€ข Personalized Learning Dashboard
โ€ข Concept-wise Analytics
โ€ข Instant feedback mechanism
โ€ข All India comparison of progress


Benefits of the Course :

โ€ข Improved performance โ€“ With our scientifically designed content, you are bound to see significant improvements in your performance in Science.
โ€ข Attain the desired Learning โ€“ Get the desired learning outcome in 8th class Science with our exhaustive models for class 8 CBSE.
โ€ข Easy tracking of progress โ€“ We provide easy tracking facility to help you understand how you are progressing with every step in the course.
โ€ข Self-paced learning โ€“ Every individual has a different learning pace. Keeping that in mind, we have designed the course to be self-paced.
โ€ข Identify focus areas โ€“ You may be better in certain concepts than others. This course will facilitate you for a better understanding of the areas you need to focus more.
โ€ข Build strong foundations โ€“ With this course, we aim to help you understand every concept of the subject so that your foundation in Science is very strong. Solid foundation right from the formative years will help build your interest in the subject further.
โ€ข Simple parentโ€™s supervision โ€“ Parents will be able to monitor their childrenโ€™s performance easily with the features provided in the course.
โ€ข Quick re-learning โ€“ Even if you fail at solving problems, you will able to solve the problems again till you get it, thus allowing room for re-learning.


Courses Offered :

โ€ข Class 8 โ€“ Physics
โ€ข Class 8 โ€“ Chemistry
โ€ข Class 8 โ€“ Biology
โ€ข Class 8 โ€“ Exam Revision


Syllabus :
  • Chapter 1 - Crop Production and Management
  • Chapter 2 - Microorganisms Friend and Foe
  • Chapter 3 - Synthetic fibre and plastics
  • Chapter 4 - Materials: Metals and non-metals
  • Chapter 5 - coal and petroleum
  • Chapter 6 - Combustion of flame
  • Chapter 7 - Conservation of Plants and Animals
  • Chapter 8 - Cell-Structure and Functions
  • Chapter 9 - Reproduction in Animals
  • Chapter 10 - Reaching the Age of Adolescence
  • Chapter 11 - Force and Pressure
  • Chapter 12 - Friction
  • Chapter 13 - Sound
  • Chapter 14 - Chemical effect of an electric current
  • Chapter 15 - Some natural phenomenon
  • Chapter 16 - Light
  • Chapter 17 - Stars and Solar System
  • Chapter 18 - Pollution of Air and Water

Detailed Syllabus :
1 CROP PRODUCTION AND MANAGEMENT

1.1 Introduction
1.2 Agriculture Practices
1.2.1 Kharif Crops
1.2.2 Rabbi Crops
1.3 Basic Practices of Crop Production
1.3.1 Agricultural Implements
1.4 Sowing
1.4.1 Selection of Seeds
1.4.2 Traditional Tools
1.4.3 Seed drill
1.5 Adding Manure and Fertilisers
1.6 Irrigation
1.6.1 Sources of irrigation
1.6.2 Traditional Methods of Irrigation
1.6.3 Modern Methods of Irrigation
1.7 Protection from Weeds
1.8 Harvesting
1.9 Storage
1.10 Food from Animals

2 MIICROORGANIISMS: FRIIEND AND FOE
2.1 Introduction to microorganisms
2.2 Microorganisms
2.3 Where do Microorganisms Live?
2.4 Microorganisms and Us
2.4.1 Friendly Microorganisms
2.4.2 Making of Curd and Bread
2.4.3 Commercial Use of Microorganisms
2.4.4 Medicinal Use of Microorganisms
2.4.5 Vaccine
2.4.6 Increasing Soil Fertility
2.4.7 Cleaning the Environment
2.5 Harmful Microorganisms
2.5.1 Diseaseโ€” causing Microorganisms in Humans
2.5.2 Diseaseโ€” causing Microorganisms in Animals
2.5.3 Diseaseโ€” causing Microorganisms in Plants
2.5.4 Food Poisoning
2.6 Food Preservation
2.6.1 Chemical Method
2.6.2 Preservation by Common Salt
2.6.3 Preservation by Sugar
2.6.4 Preservation by Oil and Vinegar
2.6.5 Heat and Cold Treatments
2.6.6 Storage and Packing
2.7 Nitrogen Fixation
2.8 Nitrogen cycle

3 SYNTHETIIC FIIBRES AND PLASTIICS
3.1 Introduction
3.2 What are Synthetic Fibres?
3.3 Types of Synthetic Fibres
3.3.1 Rayon
3.3.2 Nylon
3.3.3 Polyester and Acrylic
3.4 Characteristics of Synthetic Fibres
3.5 Plastics
3.6 Plastics as Materials of Choice
3.6.1 Plastic is non-reactive
3.6.2 Plastic is light, strong and durable
3.6.3 Plastics are poor conductors
3.7 Plastics and the Environment

4 MATERIIALS: METALS AND NONโ€”METALS
4.1 Physical Properties of Metals and Non-metals
4.2 Chemical Properties of Metals and Non-metals
4.2.1 Reaction with Oxygen
4.2.2 Reaction with water
4.2.3 Reactions with Acids
4.2.4 Reactions with Bases
4.2.5 Displacement Reactions
4.3 Uses of Metals and Nonmetals

5 COAL AND PETROLEUM
5.1 Introduction
5.1.1 Inexhaustible Natural Resources
5.1.2 Exhaustible Natural Resources
5.2 Coal
5.2.1 Coke
5.2.2 Coal tar
5.2.3 Coal gas
5.3 Petroleum
5.3.1 Refining of Petroleum
5.4 Natural Gas
5.5 Some Natural Resources are Limited

6 COMBUSTIION AND FLAME
6.1 Introduction
6.2 What is Combustion?
6.3 How do We Control Fire?
6.4 Types of Combustion
6.5 Flame
6.6 Structure of a Flame
6.7 What is a Fuel?
6.8 Fuel Efficiency
6.8.1 Burning of Fuels Leads to Harmful Products

7 CONSERVATIION OF PLANTS AND ANIIMALS
7.1 Deforestation and Its Causes
7.2 Consequences of Deforestation
7.3 Conservation of Forest and Wildlife
7.4 Biosphere Reserve
7.5 Flora and Fauna
7.6 Endemic Species
7.7 Wildlife Sanctuary
7.8 National Park
7.9 Red Data Book
7.10 Migration
7.11 Recycling of Paper
7.12 Reforestation

8 CELL โ€” STRUCTURE AND FUNCTIIONS
8.1 Discovery of the Cell
8.2 The Cell
8.3 Organisms show Variety in Cell Number, Shape and Size
8.3.1 Number of Cells
8.3.2 Shape of Cells
8.3.3 Size of Cells
8.4 Cell Structure and Function
8.5 Parts of the Cell
8.5.1 Cell Membrane
8.5.2 Cytoplasm
8.5.3 Nucleus
8.6 Comparison of Plant and Animal Cells

9 REPRODUCTIION IIN ANIIMALS
9.1 Modes of Reproduction
9.2 Sexual Reproduction
9.2.1 Male Reproductive Organs
9.2.2 Female Reproductive Organs
9.2.3 Fertilization
9.2.4 Development of Embryo
9.2.5 Viviparous and Oviparous Animals
9.2.6 Young Ones to Adults
9.3 Asexual Reproduction

10 REACHIING THE AGE OF ADOLESCENCE
10.1 Adolescence and Puberty
10.2 Changes at Puberty
10.2.1 Increase in Height
10.2.2 Change in Body Shape
10.2.3 Voice Change
10.2.4 Increased Activity of Sweat and Sebaceous Glands
10.2.5 Reaching Mental, Intellectual and Emotional Maturity
10.3 Secondary Sexual Characters
10.4 Role of Hormones in Initiating Reproductive Function
10.5 Reproductive Phase of Life in Humans
10.6 How is the Sex of the Baby Determined
10.7 Hormones other than Sex Hormones
10.8 Role of Hormones in completing the Life History of Insects and Frogs
10.9 Reproductive Health
10.9.1 Nutritional Needs of the Adolescents
10.9.2 Personal Hygiene
10.9.3 Physical exercise
10.9.4 Say โ€œNOโ€ to Drugs

11 Force and Pressure
11.1 Introduction
11.2 Force โ€“ A Push or a Pull
11.3 Forces are due to an Interaction
11.4 Exploring Forces
11.5 A Force can Change the State of Motion
11.6 Force can Change the Shape of an Object
11.7 Contact
11.7.1 Muscular Force
11.7.2 Friction
11.8 Non-contact Forces
11.8.1 Magnetic Force
11.8.2 Electrostatic Force
11.8.3 Gravitational Force
11.9 Pressure
11.10 Pressure exerted by Liquids and Gases
11.11 Atmospheric Pressure

12 FRICTION
12.1 Force of Friction
12.2 Factors affecting Friction
12.3 Friction : A Necessary Evil
12.4 Increasing and Reducing Friction
12.5 Wheels Reduce Friction
12.6 Fluid Friction

13 SOUND
13.1 Introduction
13.2 Sound is Produced by a Vibrating Body
13.3 Sound Produced by Humans
13.4 We hear Sound through Our Ears
13.5 Loudness and Pitch
13.6 Amplitude, Time Period And Frequency Of A Vibration
13.7 Audible and Inaudible Sounds
13.8 Noise and Music
13.9 Noise Pollution
13.9.1 Measures to Limit Noise Pollution

14 CHEMICAL EFFECTS OF ELECTRIC CURRENT
14.1 Introduction
14.2 Do Liquids Conduct Electricity?
14.3 Chemical Effects of Electric Current
14.4 Electroplating

15 SOME NATURAL PHENOMENA
15.1 Introduction
15.2 Lightning
15.3 Charging by rubbing Types of Charges and their Interaction
15.4 Transfer of Charge
15.5 The Story of Lightning
15.6 Lightning Safety
15.6.1 Finding a safe place
15.6.2 Doโ€™s and Donโ€™ts during a Thunderstorm
15.7 Earthquakes
15.7.1 What is an Earthquake?
15.7.2 What Causes an Earthquake?
15.7.3 Protection against Earthquakes

16 LIIGHT
16.1 What makes Things Visible
16.2 Laws of Reflection
16.3 Regular and Diffused Reflection
16.4 Reflected Light Can be Reflected Again
16.5 Multiple Images
16.5.1 Kaleidoscope
16.6 Sunlight โ€” White or Coloured
16.7 What is inside Our Eyes?
16.8 Care of Eyes
16.9 Visually Challenged Persons Can Read and Write
16.10 What is a Braille System?

17 STARS AND THE SOLAR SYSTEM
17.1 Introduction
17.2 The Moon
17.2.1 The Moonโ€™s Surface
17.3 The Stars
17.4 Constellations
17.4.1 Ursa Major
17.4.2 Orion
17.4.3 Cassiopeia
17.5 The Solar System
17.5.1 The Sun
17.5.2 The Planets
17.5.3 Mercury (Budh)
17.5.4 Venus (Shukra)
17.5.5 The Earth
17.5.6 Mars (Mangal)
17.5.7 Jupiter (Brihaspati)
17.5.8 Saturn (Shani)
17.5.9 Uranus and Neptune
17.6 Some Other Members of the Solar System
17.6.1 Asteroids
17.6.2 Comets
17.6.3 Meteors and Meteorites
17.6.4 Artificial Satellites

18 POLLUTION OF AIR AND WATER
18.1 Air Pollution
18.2 How does Air Get Polluted?
18.3 Case Study: The Taj Mahal
18.4 Greenhouse Effect
18.5 What can be Done?
18.6 Water Pollution
18.7 How does Water Get Polluted?
18.8 What is Potable Water and How is Water Purified?
18.9 What can be Done?
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