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
- Power Plants Based on 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
- Contact Force
- Non-Contact Force
Contact Force:
Forces that work on an object by touching it directly or through something else are called contact forces.
Examples:
- Muscular Force: This is the force used by our muscles or the muscles of animals like bullocks, horses, and camels to do work.
- Mechanical Force: The force created by machines to do tasks.
- Frictional Force: This force happens between two surfaces in contact. It slows down or stops the movement of one surface sliding over the other.
Non-Contact Force:
Forces that work on objects without touching them are called non-contact forces.
Examples:
- Gravitational Force: This force pulls objects toward the Earth, making them fall to the ground. An object's weight is due to this force pulling it toward the centre of the Earth.
- Electrostatic Force: A force that acts between objects with electric charges, even if they are not touching.
- Magnetic Force: The force a magnet uses to pull or push other magnets or metal objects from a distance. Since magnetic and electrostatic forces can act without direct contact, they are called non-contact forces.
If you would like to contribute notes or other learning material, please submit them using the button below.