The Mouth and Buccal Cavity The foodpipe/oesophagus The Stomach The Small Intestine Absorption
in the Small Intestine Large Intestine Digestion in Grass-eating Animals
Feeding and Digestion in Amoeba
Wool
Animals that yield Wool From Fibres to Wool Silk
Hot and Cold
Measuring Temperature
Laboratory Thermometer
Transfer Of Heat
Summary
Acids and Bases
Natural Indicators Around Us
Neutralisation
Neutralisations in Everyday Life
Summary
Physical Changes
Chemical Changes
Rusting of Iron
Crystallisation
Weather
Climate
Climate and Adaptation
The Tropical Rainforests
Air Exerts Pressure
High Speed Winds are Accompanied by Reduced Air Pressure
Air Expands onHeating
Wind Currents are Generated due to Uneven Heating on the
Thunderstorms and Cyclones
Summary
Soil Teeming with life
Soil Profile
Soil Types
Properties of Soil
Absorption of water by Soil
Soil and Crops
Summary
Why do We Respire?
Breathing
How do We Breathe?
What do We Breathe out?
Breathing in other Animals
Breathing under Water
Do plants also respire?
Circulatory system
Blood Blood vessels Heart Heartbeat Excretion In Animals
Excretory System in Humans Transport of Substances in Plants
Summary
Modes of reproduction
Asexual Reproduction Vegetative propagation Budding Fragmentation Spore formation Sexual Reproduction
Pollination Fertilisation Fruits and Seed formation
Seed Dispersal
Slow or Fast
Speed
Measurement of Time
Measuring Speed
Distance-Time Graph
Symbols of Electric Components
Heating Effect of Electric Current
Magnetic Effect of Electric Current
Electromagnet
Electric Bell
Light Travels Along a Straight Line
Reflection of Light
Playing With Spherical Mirrors
Images formed by Lenses
Sunlight White or Coloured
How much Water is available
Forms of water
Groundwater as an important source of water
Depletion of Water Table
Increasing Population, industries and Agricultural activities Distribution of Water
Water Management
What Role you can Play
Effect of Water Scarcity on Plants
Forest
Conservation of forest
Water, our lifeline
What is Sewage?
Water freshens up an eventful journey
Wastewater Treatment Plant (wwtp)
Better house keeping practices
Mathematics
Comparison of Quantities with the help of ratio
Mathematics
Counting the Square methode
Mathematics
Properties of Integers
Topics Covered
Introduction
Properties of Addition and Subtraction of Integers
Closure under Addition and Subtraction Commutative Property Associative Property Additive Identity
Multiplication of Integers
Multiplication of a Positive and a Negative Integer Multiplication of two Negative Integers Properties
of Multiplication of Integers
Closure and Commutative of Multiplication Multiplication by Zero Associativity for Multiplication
Distributive Property Division of Integers
Properties of Division of Integers
Summary
Introduction
How well have you learnt about Fractions?
Multiplication of Fractions
Multiplication of a Fraction by a Whole Number Multiplication of a Fraction by a Fraction Division
of Fractions
Division of Whole Number by a Fraction Division of a Fraction by a Whole Number Division of a
Fraction by Another Fraction How Well have you learnt about Decimal Numbers
Multiplication of Decimal Numbers
Multiplication of Decimal Numbers by 10, 100 and 1000 Division of Decimal Numbers
Division by 10, 100 and 1000 Division of a Decimal Number by a Whole Number Division of a Decimal
Number by another Decimal Number Summary
Introduction
Collecting Data
Organisation of Data
Representative Values
Arithmetic mean
Range Mode
Median
Use of Bar Graphs with a Different Purpose
Chance and Probability
Summary
A Mind-reading Game!
Setting up of an Equation
What Equation is?
Solving an Equation More equations
Applications of Simple Equations to Practical Situations
Intersecting Lines Transversal Angles made by a Transversal Transversal of Parallel Lines Checking
for Parallel lines
Summary
Introduction
Medians of a Triangle
Altitudes of a Triangle
Exterior angle of a Triangle and its property
Angle Sum Property Of a Triangle
Two Special Triangles : Equilateral and Isosceles
Sum of the Lengths of two Sides of a Triangle
Right-angled Triangles and Pythagoras Property
Summary
Introduction
Congruence of Plane Figures
Congruence of Triangles
Criteria for Congruence of Triangles
SSS Game SAS Game ASA Game Congruence among Right-angled Triangles
Summary
Introduction
Equivalent Ratios
Percentage another way of Comparing Quantities
Meaning of Percentage Converting Percentages to Fractions, Decimals and Numbers Converting Decimals
to Percentage Converting Fractions, Decimals and Numbers into Percentage Applications of Percentage
Use of Percentages
Increase or Decrease as Per Cent Prices related to an Item or Buying and Selling
Construction of a line Parallel to a given line, through
Construction of Triangles
Constructing a Triangle when the Lengths of its Three Si
Constructing a Triangle when the lengths of two sides an
Constructing a triangle when the measures of two of its
Constructing a right-angled triangle when the length of
Summary
Introduction
Squares and Rectangles
Area of a Parallelogram
Area of a Triangle
Circles
Circumference of a Circle Area of Circle Conversion of Units
Applications
Summary
Introduction
How are expressions formed
Terms of an expression
Like and Unlike terms
Monomials, Binomials, Trinomials and Polynomials
Addition and Subtraction of Algebraic Expressions
Finding the Value of an expression
Using Algebraic Expressions ? formulas and rules
Summary
Introduction
Exponents
Laws of exponents
Multiplying Powers with the Same Base Dividing Powers with the Same Base Taking Power of a Power
Multiplying Powers with the Same Exponents Dividing Powers with the Same Exponents Numbers
with exponent zero Miscellaneous Examples using the Laws of Exponents
Expressing Large Numbers in the Standard Form
Summary
Introduction
Lines of symmetry for Regular Polygon
Rotational Symmetry
Line symmetry and Rotational symmetry
Summary
Introduction: Plane Figures and Solid Shapes
Faces, Edges and Vertices
Nets for building 3-D shapes
Drawing solids on a flat surface
Viewing Different Sections of a Solid
One Way to View an Object is by Cutting or Slicing Another Way is by Shadow Play A Third Way
is by Looking at it from Certain Angles to Get Different Views Summary