Chapter 1

Nutrition in Plants

Mode of Nutrition in Plants

medium • 1 min read

Photosynthesis - Food Making Process in Plants

medium • 2 min read

Other Modes of Nutrition in Plants

medium • 3 min read

Saprotrophs

medium • 4 min read

How Nutrients are Replenished in the Soil

medium • 5 min read

Chapter 2

Nutrition in Animals

Different Ways of Taking Food

medium • 1 min read

Digestion in Humans

medium • 2 min read

Digestion in Grass-Eating Animals

medium • 3 min read

Feeding and Digestion in Amoeba

medium • 4 min read

Chapter 3

Heat

Hot and Cold

medium • 1 min read

Measuring Temperature

medium • 2 min read

Laboratory Thermometer

medium • 3 min read

Transfer of Heat

medium • 4 min read

Kinds of Clothes We Wear in Summer and Winter

medium • 5 min read

Chapter 4

Acids, Bases and Salts

Acids and Bases

medium • 1 min read

Natural Indicators Around Us

medium • 2 min read

Neutralisation

medium • 3 min read

Neutralisations in Everyday Life

medium • 4 min read

Chapter 5

Physical and Chemical Changes

Physical Changes

medium • 1 min read

Chemical Changes

medium • 2 min read

Rusting of Iron

medium • 3 min read

Crystallisation

medium • 4 min read

Chapter 6

Respiration in Organisms

Why Do We Respire?

medium • 1 min read

Breathing

medium • 2 min read

How Do We Breathe?

medium • 3 min read

What Do We Breathe Out?

medium • 4 min read

Breathing in Other Animals

medium • 5 min read

Breathing Under Water

medium • 6 min read

Do Plants Also Respire?

medium • 7 min read

Chapter 7

Transportation in Animals and Plants

Circulatory System

medium • 1 min read

Excretion in Animals

medium • 2 min read

Transport of Substances in Plants

medium • 3 min read

Chapter 8

Reproduction in Plants

Modes of Reproduction

medium • 1 min read

Sexual Reproduction

medium • 2 min read

Fruits and Seed Formation

medium • 3 min read

Seed Dispersal

medium • 4 min read

Chapter 9

Motion and Time

Slow or Fast

medium • 1 min read

Speed

medium • 2 min read

Measurement of Time

medium • 3 min read

Measuring Speed

medium • 4 min read

Distance-Time Graph

medium • 5 min read

Chapter 10

Electric Current and its Effects

Symbols of Electric Components

medium • 1 min read

Heating Effect of Electric Current

medium • 2 min read

Magnetic Effect of Electric Current

medium • 3 min read

Electromagnet

medium • 4 min read

Electric Bell

medium • 5 min read

Chapter 11

Light

Light Travels Along a Straight Line

medium • 1 min read

Reflection of Light

medium • 2 min read

Playing with Spherical Mirrors

medium • 3 min read

Images Formed by Lenses

medium • 4 min read

Sunlight - White or Coloured

medium • 5 min read

Chapter 12

Forests: Our Lifeline

Visit to a Forest

medium • 1 min read

Structure of a Forest

medium • 2 min read

Interdependence of Plants and Animals

medium • 3 min read

Importance of Forests

medium • 4 min read

Chapter 13

Wastewater Story

Water, Our Lifeline

medium • 1 min read

What is Sewage?

medium • 2 min read

Water Freshens Up - An Eventful Journey

medium • 3 min read

Wastewater Treatment Plant (WWTP)

medium • 4 min read

Better House Keeping Practices

medium • 5 min read

Sanitation and Disease

medium • 6 min read

Alternative Arrangement for Sewage Disposal

medium • 7 min read

Sanitation at Public Places

medium • 8 min read