Watch Educational Videos for Class Seven

Biology Physics Chemistry Maths

Biology             

Biotic Abiotic Components

The different lessons in this topic explain about environment and elements. It explains about different elements of environment like biotic and abiotic etc. It shows how different elements of environment interact within the ecosystem and how biotic elements interact to form a biotic community.
Biotic abiotic components (8:20 min)

Habitat and Adaptation

The different lessons in this topic explain about habitats and adaptation. It first describes about different habitats and also explains the challenges organisms face in different habitats and how they overcome these challenges through adaptation.
Aquatic habitat (7:28 min)
Forest habitat (10:08 min)
Grassland and Polar habitat (5:56 min)
Desert habitat and adaptation (4:12 min)
Different Habitats of Plants (2:15 min)

Respiration

The different lessons in this topic explain about respiration - aerobic and anaerobic respiration process and importance of respiration. It describes how human breathe. It also describes how different animals breathe like fish, earthworm, single cell organisms etc and explains how plants exchange gases with the environment.
What is respiration (11:21 min)
Breathing in human (8:19 min)
Human respiration overview (3:59 min)
Breathing in other animals (5:37 min)

Nutrition

The different lessons in this topic explain about nutrition, how food is digested in human. It describes different processes involved in animal nutrition (Ingestion, digestion, absorption, assimilation, egestion) and also describes about different type of plant nutrition. It explains the classification of plants based on nutrition method.
Human digestion system (9:26 min)
Human digestion overview (3:21 min)
Human nutrition (9:35 min)
Plant nutrition (7:29 min)

Transport in Living Organisms

The different lessons in this topic explain about transport system in living organisms. It explains about blood circulation, properties of arteries and veins, capillaries, substances in blood, how heart functions. It also describes about circulatory system in plant and how it functions.
Blood and transport system (9:52 min)
How heart functions - overview (3:45 min)
How heart functions and How blood circulates in humans (9:30 min)
Transport in plants (7:35 min)

Excretion

The different lessons in this topic explain about excretion in living organisms. It describes excretory system in human and how it functions. It describes about excretion in other animals. It also explains how plants get rid of harmful substances.
Excretion in Human - Overview (1:56 min)
Excretion in human and animals(6:44 min)
Plant excretion (3:35 min)

Plant Reproduction

The different lessons in this topic explain how pollination and fertilization occurs. It also explains about different methods of asexual reproduction like budding, fragmentation, vegetative reproduction. It describes different natural and artificial process of vegetative reproduction elaborately.
Plant - sexual reproduction (6:08 min)
Plant - asexual reproduction (9:45 min)

Importance of Forest

The different lessons in this topic explain importance of forests. It explains about layers of vegetation in forest. It also puts light issues we are facing due to deforestation like soil erosion, lack of water, changing climate etc.
Importance of forest (9:24 min)

Physics             

Mirror and Lens

The various lessons in this topic explain about mirrors and lens. It explains about different types of mirror and lens and their properties. It describes properties of reflection formed on different mirror and lens. It also explains the usage of different mirrors and lens. It starts with a short adventurous story – The Giant’s Palace.
The giant's palace Part 1 (6:10 min)
The giant's palace Part 2 (6:54 min)
Mirror and Reflection (13:16 min)
What are lenses (11:50 min)

Electricity and Electromagnet

The different lessons in this topic explain about heating and magnetic effects of electricity. It explains short circuit, overloading, use of fuse etc. It also describes the magnetic effect of electricity, how it is used to make electromagnet how electric bell works etc. It also shows ways to save electricity.
Heating effect - Overloading, short circuit (8:42 sec)
Heating effect - safety and application (7:52 min)
Magnetic effect of electriity (7:03 min)
How an electric bell works (4:59 min)
Why and how conserve electricity (9:28 min)

Heat and Temperature

The various lessons in this topic explain about heat and temperature. It describes how to measure temperature, properties and usage of insulator and conductor. It elaborately describes different heat transfer processes like conduction, convection and radiation. It starts with a touching, cute musical story – The lost friendship.
The Lost Friendship (7:58 sec)
What is temperature(8:01 min)
Insulator and conductor (5:45 min)
Heat transfer - conduction and convection (6:58 min)
Heat transfer - radiation (6:09 min)

Fibre to Fabric

The different lessons in this topic explain the processing of wool, silk yarns i.e. how wool yarn is obtained from sheep and silk yarn is obtained from cocoon of silk worm. It also gives clear idea about importance and characteristics of these animal fibres.
Fibre, Yarn and Fabric (5:56 min)
Fibre to fabric - wool (6:53 min)
Fibre to fabric - silk(6:12 min)

Motion - Speed, periodic motion

The different lessons in this topic explain what speed is, characteristics of speed and also explain how speed is measured. It also explains characteristics of oscillatory motion and shows how motion of a pendulum is used to measure time.
Speed and its calculation (6:59 min)
Time measurement (6:40 min)

Chemistry             

Molecules And Atoms

The different learning contents in this topic explains the following concepts related to liquid: how matter is made up of molecules and atoms, what is physical change and chemical change.
Molecules And Atoms (9:23 min)

Physical and Chemical Changes

The different lessons in this topic explain about physical change and chemical change in detail like difference between physical and chemical change, what happens during those changes etc. It also gives many examples of both kinds of changes. It also shows how to stop undesired changes. It starts with a short musical video –Today is the day.
Changes around us:Physical and chemical change (2:38 min)
Physical and chemical change in real life (9:59 min)
Physical and chemical change (12:12 min)

Acid Base Salt

The different lessons in this topic explain properties of acid, base and usage of different acids, bases. It describes how to recognize acid and base using indicators and explains properties of few indicators. It describes the neutralization reaction and it usage in real life. It also explains about salt, their properties and their usage.
What are acid, base (10:42 min)
What are indicators (4:46 min)
Neutralization overview (2:23 min)
What is neutralization (5:19 min)
What is salt (5:27 min)

Water: Importance, Source and Problems

The lessons in this topic explain the importance of water, how rain occurs, sources of water and how these sources are dependent on rain. Lessons also describe different water problems like drought, water table depletion etc.
Importance of Water (6:13 min)
Water cycle (4:37 min)
Water problem (6:56 min)

Rain Water Harvesting

The different lessons in this topic discuss about Rainwater harvesting and how it can solve water scarcity issue. It Lessons give brief description about the procedure of rooftop rainwater harvesting and underground water recharge using rain water.
Rainwater Harvesting (8:15 min)
Underground Water Recharge (11:00 min)

Maths             

Number System

The lessons in this topic explain the place values of Indian and International number system. It also elaborates the difference and relation between place values of the two number systems.
Counting upto lakh (11:35 min)
Counting upto 10 lakh (6:34 min)
Indian number system (06:49 min)
How to read large number (7:46 min)
International Numeral System (10:46 min)
Difference between Indian and International number system (5:51 min)

Integer

The lessons in this topic explain about properties of integers, additive inverse, absolute value etc. It explains how to do addition, subtraction with integers. It describes about closure, associative and commutative properties. It starts with a nice touching story of two friends – Rise or Fall.
Rise or Fall – Part 1 (6:10 min)
Rise or Fall – Part 2 (7:47 min)
What are Integers (10:33 min)
Use of Integers (8:29 min)
Integers on a number-line (6:08 min)
Absolute Value (6:11 min)
Ordering of Integers (6:47 min)
Additive Inverse (6:36 min)
Addition of Integers (11:04 min)
Subtraction of Integers (8:29 min)
Integer addition properties - Part 1 (6:58 min)
Integer addition properties - Part 2 (5:03 min)
Integer subtraction properties - Part 1 (4:58 min)
Integer subtraction properties - Part 2 (6:37 min)
Integer multiplication properties - Part 1 (5:42 min)
Integer multiplication properties - Part 2 (5:36 min)
Integer division properties - Part 1 (4:22 min)
Integer division properties - Part 2 (7:28 min)

Rational Number

The different lessons in this topic explain what rational numbers are, their properties, how to represent different rational numbers on a number-line and compare. It also explains about conversion between rational number and decimals, standard form of rational numbers, rational-irrational numbers. It shows how to perform basic arithmetic operations on all the rational numbers.
What are rational number (8:57 min)
Equivalent rational number (8:06 min)
Rational number standard form (10:01 min)
Comparing rational numbers (7:38 min)
Rational number addition (9:40 min)
Rational number subtraction (5:29 min)
Rational number multiplication(9:03 min)
Rational number division(10:07 min)
Rational number as decimal (8:30 min)

Fraction - Addition

The lessons in this topic explain addition of like fractions and addition of unlike fractions.
Fraction - Simple Addition (12:42)
Fraction Addition using L.C.M. (10:40 min)

Fraction - Subtraction

The lessons in this topic explain how to subtract like fraction and also describe the method to do subtraction with unlike fractions.
Fraction - Simple Subtraction (8:21 min)
Fraction Subtraction using L.C.M. (9:12 min)

Fraction Multiplication Reciprocal

The lessons in this topic explain how to multiply a fraction with another fraction or whole number. It also clears the concept of reciprocal and explains division as multiplication by reciprocal of divisor.
Fraction multiply by whole number (6:45 min)
Fraction multiply by fraction (9:00 min)
Fraction division and reciprocal(8:53 min)

Decimal System

The different learning content in this topic explain the decimal system. It also explains how to convert a fraction into a decimal number and vice versa.
Decimal Introduction (14:12 min)
Fraction To Decimal Conversion - Part 1 (13:18 min)
Fraction To Decimal Conversion - Part 2 (7:40 min)
Decimal To Fraction Conversion (5:55 min)

Decimal Multiplication

The lessons in this topic explain how to do decimal multiplication. It explains the use of decimal multiplication.
Decimal multiplication (14:17 min)

Decimal Division

The lessons in this topic explain how to divide a number by a decimal number. It also describes how to divide decimal no. by a decimal no. and how to find the value of a fraction.
Decimal division (16:07 min)

Ratio

The lessons in this topic explain what ratio is and how to compare quantities using ratio, how to find simplest form of ratio and equivalent ratio. It starts with a short nice story for children – How Much Milk, How Much Water.
How much milk - Part 1 (5:14 min)
How much milk - Part 2 (5:14 min)
What is ratio (8:49 min)
Equivalent ratios (7:56 min)
A:B not same as B:A (8:53 min)
Quantities in same unit in ratio (4:56 min)
Ratio word problems (6:13 min)

Proportion

The lessons in this topic explain what proportion is and how it is related to ratio. It explains how to find whether two ratios are in proportion or not and elaborates the properties of proportion.
What is Proportion (3:57 min)
Are ratios in proportion (7:30 min)
Statement of proportion (4:32 min)

Unitary Method

The lessons in this topic explain about unitary method. It explains what unitary method is and how it is used to find value of single unit. It also elaborates the use of unitary method to find value of desired number of units.
What is unitary method (3:49 min)
Examples of unitary method (5:49 min)

Base and Exponent

The lessons in this topic explain what exponent is and how to express a number in exponential form. It explains how to read, write numbers in exponential form, value of number with negative base, value of number having power of power. It describes how to add-subtract, divide-multiply numbers in exponential form. It starts with a nice witty story – Gold or grain.
Gold or grain(10:12 min)
What are base and exponent(12:04 min)
Exponent with negative base (4:57 min)
Law of exponents I, II (8:39 min)
Law of exponents III, IV, V (7:45 min)
Law of exponents VI, VII (9:43 min)
How to multiply negative exponents (6:53 min)
Exponents - Merging maths and science (8:25 min)
Law of exponent usage (7:57 min)

Profit and Loss

The lessons in this topic explain the concept of profit and loss and its importance in daily life and business. It also explains how to calculate profit and loss. It starts with nice story – Raheem’s Tasty Food, which would be helpful to understand the topic.
Raheem's Tasty Food - Part 1 (9:10 min)
Raheem's Tasty Food - Part 2 (7:14 min)
Profit and Loss (10:06 min)

Percentage

The different lessons in this topic explain what percentage is and its use in real life. It elaborates how to find percentage. It explains the concept of percentage of loss or profit in business and how it is calculated. It starts with a funny story – Ssshhh! Don’t tell anyone.
Ssshhh! Don't tell anyone (9:57 min)
What is percentage (7:52 min)
Examples of percentage (6:12 min)
Percentage in profit and loss (10:50 min)

Simple Interest

The different lessons in this topic explain the concept of simple interest. It explains the concept of simple interest. It elaborates how to find simple interest. It explains the significance of simple interest in real life. It starts with an inspiring story – Hoshiyarpur becomes self-reliant.
Hoshiyaarpur becomes self-reliant - part 1(6:57 min)
Hoshiyaarpur becomes self-reliant - part 2 (6:53 min)
What is Simple Interest (8:02 min)
Simple Interest examples (8:32 min)

Algebraic Expression

The lessons in this topic explain about algebraic expression. It describes how to form polynomial algebraic expression, elements in algebraic expression, how to solve such expressions. It explains about like-unlike term, degree of polynomial etc. It also explains how to do addition and subtraction with variable and algebraic expression. It starts with an inspiring story of two friends – A helping hand.
A helping hand - Part 1 (8:00 min)
A helping hand - Part 2 (6:18 min)
What is an algebraic expression (08:01 min)
Algebraic term, co-efficient, factor (9:37 min)
What are like-unlike terms (4:53 min)
Degree of polynomial (5:52 min)
Addition of algebraic expressions (6:34 min)
Subtraction of algebraic expressions (4:36 min)
Use of algebraic expression (7:22 min)

Simple Equation

The lessons in this topic explain about simple equation. It explains what equation is, when and how it is used. It explains about properties of equation. It first explains the basic concept of equation solving i.e. balancing both sides. It describes about root of equation, how to solve equation using transposition method.
What is an algebraic equation (11:19 min)
Solving simple equation - Transpose method(8:19 min)
Solving simple equation examples (7:21 min)

Mean Median Mode

The lessons in this topic explain the concepts of data handling. It explains what range of data is and how to find the range of data. Then it describes about different central tendencies like - mean, median and mode and how to find those for a set of data. It also explains the scenarios each central tendency is appropriate for through short stories.
Fisheman go mobile part - 1 (4:13 min)
Fisheman go mobile part - 2 (6:26 min)
What is range (5:36 min)
Measurement of central tendency - mean (10:37 min)
A dream comes true (4:46 min)
What is median (11:06 min)
How much to order (4:19 min)
What is mode (10:32 min)

Symmetry

The different lessons in this topic explain about rotational and translation symmetry. It describes angle of rotation in rotation symmetry and how translation symmetry is used in design. It starts with a short video of school function– Teachers’ Day Celebration.
The teacher's day (6:18 min)
Rotational and translation symmetry (10:42 min)

Properties of Triangle

The different lessons in this topic explain about different properties of triangle like the theory of sum of sides and sum of angles . It also describes the relation between interior and exterior angle in triangle. It describes Pythagoras theorem. It describes the use of Pythagoras theorem in real life.
Two side sum property (4:16 min)
Angle sum property (4:02 min)
Exterior angle property (7:00 min)
What is Pythagoras theorem (6:53 min)
Usage of Pythagoras theorem (5:43 min)

Congruence

The different lessons in this topic explain about congruence what congruence is and how to know whether two figures are congruent of not. It also explains conditions of congruence in triangle which are SSS , ASA , SAS and RHS condition for right triangles. It also shows how to draw triangle when side and angles are given.
What is congruence (9:51 min)
Are these congruent figures (2:14 min)
SSS rule (9:32 min)
SAS rule (8:50 min)
ASA rule (7:56 min)
RHS rule (5:47 min)

Geometry - Perimeter

The lessons in this topic explain how to measure perimeter of regular shapes. It also elaborates how to find perimeter of irregular shapes using the basic concept of perimeter. It also shows how to find perimeter of circle and how that formula is derived from ? (pie). It starts with an inspiring story – Anything for Motherland.
Anything For Motherland - Part 1 (6:56 min)
Anything For Motherland - Part 2 (10:31 min)
What is a Perimeter (5:16 min)
Perimeter Of a Square (9:09 min)
Perimeter Of equilateral triangle (4:23 min)
Perimeter Of regular polygon (7:51 min)
Perimeter Of a Rectangle (8:16 min)
Perimeter Of an Irregular Shape (13:40 min)
Circumference of circle (7:44 min)

Geometry - Area

The lessons in this topic explain how to measure area. It shows how area of parallelogram is measured. It explained the way formula is derived. It also shows how formula of area of circle is derived. It describes how to measure area of different triangles and how these formulas are derived.
Area of parallelogram (6:05 min)
Area of right triangle (5:28 min)
Area of triangle (4:30 min)
Area of circle (3:50 min)

Nets of Solid

The different lessons in this topic explain about nets of cube, cuboids, prism and pyramid. It also explains what polyhedron is and its properties. It starts with an entertaining magic show – The clash of magicians.
The clash of magicians (7:56 min)
What is a polyhedron (6:27 min)
What are nets of solid (5:55 min)
Nets of Cuboid Prism (4:17 min)
Nets of Pyramid (3:24 min)

Drawing Solids

The different lessons in this topic explain how a solid shape looks different from different angle. It describes why view angle is important in real life and how wrong viewing angle may cause mistake. It also describes how to draw 3D object expressing its depth and how drawings of a solid shape from different view point differs.
3D views (6:26 min)
3D views example (4:27 min)
3D drawing (5:37 min)

Probability

The different lessons in this topic explain what probability is. It describes how to measure probability of an event. It explains about sample space, how to measure probability of event from experiment. It gives definition of most likely, sure and impossible event from probability point of view. It starts with an inspiring story – Uncle’s dice.
Uncle's dice Part 1(8:21 min)
Uncle's dice Part 2(7:45 min)
What is a probability (8:29 min)
Probabilty - sample space, events(6:14 min)
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