Topics
Nutrition in Plants
Nutrition in Animals
- Different Ways of Taking Food
- Human Digestive System
- The Mouth and Buccal Cavity
- The Teeth and Its Structure
- The Salivary Glands
- The Food Pipe/Oesophagus
- The Stomach
- The Small Intestine
- Pancreas (Islets of Langerhans)
- Absorption of Food
- The Large Intestine
- Assimilation of Food
- Liver
- Digestion in Grass-eating Animal
- Feeding and Digestion in Amoeba
Heat
- Heat
- Heat Exchange
- The Temperature and a Thermometer
- Thermometer and Its Types
- Measuring Temperature
- Transfer of Heat
- Conduction
- Convection
- Radiation
- Kinds of Clothes Wear in Summer and Winter
Fibre to Fabric
- Fibre
- Fabrics
- Animal Fibres: Wool
- Animal Fibre: Silk
- Fibre to Yarn to Fabric
Acids, Bases and Salts
- Acids
- Bases (Alkalis)
- Indicators
- Types of Double Displacement: Neutralization Reaction
- Neutralization Reactions in Our Daily Life
- Similarities and Differences Between Acids and Bases
Physical and Chemical Changes
- Classification of Change: Physical Changes
- Chemical Reaction
- Experiment of Chemical Change
- Corrosion of Metals
- Crystallisation Method
Respiration in Organisms
- Cellular Respiration
- Mechanism of respiration-Breathing
- Human Respiratory System
- Breathing in Other Animals
- Breathing Under Water
- Respiration in Plant
Transportation in Animals and Plants
- Blood
- Composition of Blood > Cellular Elements: Red Blood Cells (Erythrocytes)
- Composition of Blood > Cellular Elements: White Blood Cells (Leukocytes)
- Composition of Blood > Cellular Elements: Blood Platelets (Thrombocytes)
- Blood Vessels
- Heart Beat
- Blood Circulatory System
- Human Heart
- Circulation of Blood in the Heart (Functioning of Heart)
- Excretion
- Human Excretory System
- Transport System in Plants
- Complex Permanent Tissues
- Complex Permanent Tissue: Phloem Structure and Function (Conducting Tissue)
- Complex Permanent Tissue: Xylem Structure and Function (Conducting Tissue)
- Concept of Transpiration
Weather, Climate and Adaptations of Animals to Climate
- Weather and Climate
- Climate
- Climate and Adaptation
- Adaptations and Its Types
- Adaptation in Animals
- Adaptation in animals of snowy regions
- Adaptations in Tropical Rainforests
Reproduction in Plants
- Sexual Reproduction in Plants
- Fruit
- Dispersal of Seeds
Wind Storms and Cyclones
- Atmospheric Pressure
- High Speed Winds Are Accompanied by Reduced Air Pressure
- Air Expands on Heating
- Wind Currents Are Generated Due to Uneven Heating on the Earth
- Thunderstorms
- Cyclones
- Thunderstorm and Cyclone: Destruction Causes, Safety Measures and Role of Advanced Technology
Motion and Time
- Force and Motion
- Speed
- Types of Speed
- Measurement of Time
- Devices for Measuring Time
- Simple Pendulum
- A Time Period of Oscillation and Frequency
- Measuring Speed
- Displacement - Time Graph Or Distance - Time Graph
Soil
- Properties of Soil
- Soil Profile
- Types of Soil
- Moisture in Soil
- Water Retention in Soil
- Soil and Crops
Electric Current and Its Effects
Light
- The propagation of light
- Reflection of Light
- Mirrors
- Plane Mirror
- Lateral Inversion
- Divergence and Convergence of Light
- Spherical Mirrors
- Formation of Image by Reflection: Real and Virtual Image
- Spherical Mirror > Concave Mirror
- Spherical Mirror > Convex Mirror
- Concept of Lenses
- Images Formed by Sperical Lenses
- Colour
- Prism
- Dispersion of Light
Forests: Our Lifeline
- Forests: Our Lifeline
- Forest Biome
- Classification of Plants
- The Oxygen Cycle
- Water Cycle
- Importance of Forests
Wastewater Story
- Water: Our Lifeline
- Sewage and Its Management
- Purification of Water
- Wastewater Treatment Plant (WWTP)
- Better Housekeeping Practices
- Controlling the Wastage of Water
- Sanitation and Disease
Water: A Precious Resource
- Water: Our Lifeline
- Availability of Water
- Water Cycle
- Sources of Water
- Scarcity of Water
- Distribution of Water in India
- Water Management (Conservation of Water)
- Fresh Water Management
- Controlling the Wastage of Water
- Scarcity of Water
Water Management:
Water management means using rainwater wisely and storing it so we have enough water throughout the year. Here’s how it works:
1. Rainwater is limited: We only get rain for about four months each year. If we don’t store this rainwater, we won’t have enough water for the rest of the year.
2. Storing Rainwater: When rainwater is stopped or collected, it seeps into the soil. This helps trees get water, wells fill up, and the land can be farmed.
3. Methods of Storing Water: Large dams can store a lot of water, but they can’t be built everywhere. In many places, the government and people work together to create other ways of storing water, like:
- Building small reservoirs to hold water.
- Doing contour bunding to stop rainwater from running off the land.
- Building bunds or bandharas (small barriers) across streams to collect water.
Sometimes, wells are dug in riverbeds to collect water from rain. Rainwater falling on the roofs of houses can also be collected in large tanks next to the building.
4. Why Water Management is Important
- Saving rainwater is essential to ensure a continuous supply of water throughout the year.
- Rainwater should be used wisely, prevented from flowing away, and allowed to seep into the ground or be collected in storage tanks. This helps maintain water availability even after the rainy season has ended.
