33 chapters

Chapter1

IntroductionWhat are Natural and Whole Numbers?What are Integers?Properties of Addition And Subtraction of IntegersAdditive Identity and Additive Inverse of IntegersMultiplication of IntegersIntegrative Properties of MultiplicationDivision of IntegersRepresentation of Integers on a Number LineConclusionFAQs

Chapter2

IntroductionWhat are fractions?Understanding fractionsWhat are decimals?Understanding DecimalsMultiplication of FractionsDivision of FractionsConclusionFAQs

Chapter3

IntroductionWhat is Data Handling?Collecting DataOrganisation of DataRepresentative Value of DataUse of Bar Graph with a Different PurposeConclusionFAQs

Chapter4

IntroductionSimple EquationsSolving an Equation:Setting up of an Equation Takes Four StepsThe Concept of TranspositionConclusionFAQs

Chapter5

IntroductionWhat is a Line?What is a Ray?Pair of LinesTypes of AnglesChecking for parallel linesConclusionFAQs

Chapter6

IntroductionMedians of a TriangleAltitudes of a TriangleExterior Angle of a Triangle and its PropertyAngle Sum Property of a TriangleTwo Special Triangles: Equilateral and IsoscelesSum of the Lengths of Two Sides of a TriangleRight-angled Triangles and Pythagoras PropertyConclusionFAQs

Chapter7

IntroductionCongruence of Plane FiguresCongruence Among Line SegmentsCongruence of AnglesCongruence of TrianglesCriteria for Congruence of TrianglesSSS (Side Side Side) Congruence TheoremSAS (Side Angle Side) Congruence TheoremASA (Angle Side Angle) Congruence TheoremAngle Angle Side (AAS) RuleCongruence Among Right Angled TrianglesConclusionFAQs

Chapter8

IntroductionEquivalent RatiosPercentage, Another Way Of Comparing QuantitiesUse Of PercentagesConclusionFAQs

Chapter9

IntroductionWhat Are Rational Numbers?Positive and Negative Rational NumbersRational Numbers on a Number LineRational Numbers in Standard FormComparison of Rational NumbersOperations on Rational NumbersProperties of Rational NumbersConclusionFAQs

Chapter10

IntroductionConstruction of a Line Parallel to a Given Line Through a Point Not on the LineConstruction of a TriangleConstructing a Triangle When the Lengths of its Three Sides are Known (SSS Criterion)Constructing a Triangle When the Lengths of Two Sides and the Measure of the Angle Between Them are Known (SAS Criterion)Constructing a Triangle When the Measures of Two of its Angles and the Length of the Side Inclined Between Them is Given (ASA Criterion)Constructing a Right-Angled Triangle When the Length of One Leg and its Hypotenuse are Given (RHS Criterion)FAQs

Chapter11

IntroductionPerimeter and AreaSquares and RectanglesTriangles as Parts of RectanglesArea of ParallelogramArea of TriangleArea of CircleConversion of UnitsFAQs

Chapter12

IntroductionAlgebraic ExpressionsHow are Expressions FormedTerms of an ExpressionFactors of a TermLike and Unlike TermsFinding the Value of an ExpressionAddition and Subtraction of Algebraic ExpressionsUsing Algebraic Expression Formulas and RulesFAQs

Chapter13

IntroductionThe General Form of ExponentsLaws of ExponentsApplications of Exponents and PowersConclusionFAQs

Chapter14

IntroductionMathematical Implication of SymmetryLines of SymmetryLines of Symmetry of Regular PolygonsSymmetry TypesSymmetry in ShapesConclusionFAQs

Chapter15

IntroductionDrawing Solids on a Flat Surface:Oblique Sketches:Isometric Sketches:Viewing different sections of a solid:ConclusionFAQs

Chapter1

IntroductionMode of Nutrition in PlantsAutotrophic Mode of NutritionPhotosynthesisOther Modes of Nutrition in PlantsParasitic NutritionInsectivorous NutritionSaprophytic NutritionSymbiotic NutritionHow are Nutrients Replenished in the Soil?ConclusionFAQs

Chapter2

IntroductionDifferent Ways of Taking FoodDigestion in HumansDigestion in Grass-Eating AnimalsFeeding and Digestion in AmoebaConclusionFAQs

Chapter3

IntroductionWhat are fibres?Natural FibreSynthetic FibresWhat are the fabrics?Steps to process Fibre into the fabricImportance of FabricsUsed for InsulationUsed for hygrometryUsed in Sound AbsorptionConclusionFAQs

Chapter4

IntroductionHeat and its PropertiesHow Do We Measure Heat?Transfer of HeatWhat Kinds of Clothes We Wear in Summer and Winter?ConclusionFAQs

Chapter5

IntroductionAcidsBasesIndicatorsNeutralisationSaltsConclusionFAQs

Chapter6

IntroductionWhat are the Physical Changes?What are Chemical Changes?How Does Chemical Change Happen?ConclusionFAQs

Chapter7

IntroductionWhat are the weather and climate?What are the different elements of weather?Who predicts the weather?Adaptations of Animals to ClimateConclusionFAQs

Chapter8

IntroductionAir Exerts PressureHigh-speed Winds are Accompanied by Reduced Air PressureAir Expands on HeatingWind Currents are Generated Due to Uneven Heating on the EarthStorms and CyclonesHow does a thunderstorm become a cyclone?ConclusionFAQs

Chapter9

IntroductionWhat is soil?Types of soilsUses of soilsSoil FormationSoil ProfileConclusionFAQs

Chapter10

IntroductionWhy Do We Respire?What is Cellular Respiration?What Do We Breathe Out?How Do We Breathe Out?Types of RespirationBreathing in Other AnimalsDo Plants Also Respire?ConclusionFAQs

Chapter11

IntroductionTransportation in AnimalsTransport of Substances in PlantsConclusionFAQs

Chapter12

IntroductionModes of ReproductionConclusionFAQs

Chapter13

IntroductionWhat is Motion?What is Reference Point?Speed vs. VelocityTypes of SpeedMeasurement of TimeDistance-Time GraphHow to Make a Distance Time Graph?Periodic MotionConclusionFAQs

Chapter14

IntroductionBatteryCircuitSymbols of Electric ComponentsCircuit DiagramHeating Effect of Electric CurrentFuseMagnetic Effect of Electric CurrentElectromagnetPermanent Magnet vs. ElectromagnetElectric BellConclusionFAQs

Chapter15

IntroductionLight Travels Along a Straight LineReflection of LightLaws of ReflectionImagesPlane MirrorsRight or Left InversionSpherical MirrorsPlaying With Spherical MirrorsImages Formed By LensesSunlight — White or ColouredConclusionFAQs

Chapter16

IntroductionWater - A Precious ResourceForms of WaterImportance of GroundwaterDepletion of Water TableWater ManagementEffect of Water Scarcity on PlantsWhat Role Can You Play?ConclusionFAQs

Chapter17

IntroductionForest ProfileForest ComponentsImportance of forestConservation of forestsFAQs

Chapter18

IntroductionWater - Our LifelineWhat is Sewage?Water Freshens Up - An Eventful JourneyWastewater Treatment PlantCollection of wastewaterPhysical treatment (screening)Primary treatment of wastewaterSecondary treatment of wastewaterFinal treatmentBetter Housekeeping PracticesAlternative Arrangement for Sewage DisposalSanitation at Public PlacesConclusionFAQs

- Nutrition in Plants
- Nutrition in Animals
- Fibre to Fabric
- Heat
- Acid, Bases, And Salts
- Physical and Chemical Changes
- Weather, Climate and Adaptations of Animals of Climate
- Winds, Storms and Cyclones
- Soil
- Respiration in Organisms
- Transportation in Animals and Plants
- Reproduction in Plants
- Motion and Time
- Electric Current and its effects
- Light
- Water, A Precious Resource
- Forests – Our Lifeline
- Wastewater Story