Topics
Matter
Physical Quantities and Measurement
- Measurements
- Unit and Its Types
- Unit Systems
- Physical Quantities
- Rules and Conventions for Writing SI Units and Their Symbols
- International System of Units (Si System)
- Unit Prefixes
- Measurement of Length
- Devices for Measuring Length
- Measurement of Mass
- Devices for Measuring Mass
- Measurement of Time
- Devices for Measuring Time
- The Temperature and a Thermometer
- Measuring Temperature
- Area and It’s Unit
- Measurement of Area
Force
- Force - Push or Pull
- Effect of Force
- Types of Force: Contact Force
- Types of Force: Non-Contact Force
- Force of Friction
- Effects of Friction
- Kinds of Friction
- Advantages and Disadvantage of Friction
- Increasing and Reducing Friction
Energy
- Concept of Work
- Energy
- Machines
- Principle of Machine
- Efficiency of a Machine
- Simple Machines
- Mechanical Advantage
- A Lever
- Types of Levers
- A Pulley
- A Wheel and Axle
- An Inclined Plane
- A Wedge
- Screw
- Care of Machines
- Machines (Numerical)
Light
Magnetism
- Discovery of Magnets
- Classification of Magnets
- Magnetic and Non-magnetic Materials
- Magnet
- Magnetic Properties
- Magnetic Field
- Earth’s Magnetism
- Making a Magnet
- Electromagnet
- Making of an Electromagnet
- Applications of Electromagnets
- Care and Storage of Magnets
- Demagnetization of a Magnet
Important Terms Related to Light:
| Type of Object | Description | Examples |
|---|---|---|
| Opaque Objects | Materials that do not allow any light to pass through. You cannot see through them. | Wooden cupboard, tea kettle, notebook |
| Translucent Objects | Materials that allow some light to pass through but not clearly. Objects appear blurry. | Wax paper, tinted glass, oil paper, cloth |
|
Transparent Objects |
Materials through which light passes completely, allowing clear visibility. | Piece of glass, water, clear plastic |
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Related QuestionsVIEW ALL [15]
Classify the objects given below as transparent, translucent, or opaque materials.
| Air | Rock | Water | Aluminium foil | Mirror | Snow |
| Wooden board | Polythene bag | CD | Oil soaked paper | Glass tumbler | Coloured glass |
| Transparent Materials | Translucent Materials | Opaque Materials |
