Topics
Natural Resources – Air, Water and Land
- Natural Resources
- Atmosphere and Its Layers
- Air Around Us
- Composition and Components of Air
- Importance of Air
- Air Pollution and Its Causes
- Water: Our Lifeline
- Availability of Water
- Composition of Water
- Importance of Water
- Scarcity of Water
- Land
- Soil Formation
- The Importance of Conserving Earth’s Natural Resources
The Living World
Diversity in Living Things and Their Classification
Disaster Management
Substances in the Surroundings –Their States and Properties
Substances in Daily Use
Nutrition and Diet
- Nutrients and Nutrition
- Component of Food
- Carbohydrates
- Diseases Due to Deficiency of Carbohydrates
- Fats (Lipids)
- Diseases Due to Deficiency of Fats
- Proteins
- Diseases Due to Deficiency of Proteins
- Vitamin and Minerals
- Diseases Due to Deficiency of Vitamin
- Diseases Due to Deficiency of Minerals
- Fibre
- Diseases Due to Deficiency of Fibre
- Water
- Diseases Due to Deficiency of Water
- A Balanced Diet
- Nourishment and Malnutrition
- Food Adulteration
Our Skeletal System and the Skin
Motion and Types of Motion
Force and Types of Force
Work and Energy
- Force, displacement and work
- Energy
- The relationship between work and energy
- Forms of Energy
- Mechanical Energy
- Heat Energy (Thermal Energy)
- Light Energy
- Sound energy
- Chemical Energy
- Transformation of Energy
- Energy Resources
- Conventional energy resources or non-renewable energy resources
- Non-conventional energy resources or renewable energy resources
- Energy saving and green energy
Simple Machines
Sound
Light and the Formation of Shadows
Fun with Magnets
The Universe
Need for Classification of Plants:
There are lakhs (hundreds of thousands) of different types of plants on Earth. To study and understand these plants better, we need to classify or group them based on their similarities and differences. Classification makes it easier to identify and learn about different plants.
- Plants are grouped together based on their structure, the types of organs they have, and other important characteristics.
- For example, some plants may have flowers, while others may not. Some plants are tall trees, and others are small shrubs. These differences help scientists group plants into categories.
- A scientist named Carolus Linnaeus was the first to create a scientific system to classify plants.
- Linnaeus' approach was very helpful, and scientists from all over the world used it to study plants in a more systematic manner.
- By classifying plants, it becomes easier to study the great diversity in the plant world.
- It helps scientists understand how plants are related to each other and how they differ.
- This also helps in research, agriculture, and understanding medicinal plants.
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