Lustre refers to the way light reflects off the surface of a material, giving it a shiny appearance. Materials with a high lustre, like metals (e.g., gold or silver), look shiny and glossy. On the other hand, materials with low ...

An example of classification based on hardness is the division of materials into hard and soft categories. For example, diamond is a very hard material, often used in cutting tools, while rubber is a soft material, used for making flexible ...

A material is a substance or matter used to make objects or things. It can be natural or man-made and comes in various forms such as solids, liquids, or gases. For example, wood, metal, and plastic are materials used to ...

Opaque materials are those that do not allow light to pass through. When light hits these materials, it gets blocked or absorbed. Examples of opaque materials include wood, stone, and metal. For instance, you cannot see through a wooden door ...

Kitchen containers are often transparent so that we can easily see the contents inside without opening them. This helps in identifying the food or ingredients quickly, saving time and effort. For example, we can see the amount of flour or ...

Yes, two objects of the same volume can have different masses. This happens because mass depends on the density of the material the object is made of. For example, a wooden block and a metal block can both have the ...

Some objects float while others sink depending on their density. Density is the amount of matter packed into a given volume. Objects that are less dense than water, like a wooden block, float because they are lighter compared to the ...

No, mass and weight cannot be used interchangeably because they are different concepts. Mass is the amount of matter in an object and is measured in grams or kilograms. It stays the same regardless of the object’s location. Weight, on ...

Materials can be classified by their appearance into categories such as lustrous and non-lustrous. Lustrous materials are shiny and reflect light, like metals such as gold, silver, and aluminum. On the other hand, non-lustrous materials do not shine and have ...

Glass or plastic are commonly preferred materials for making tumblers. Glass is often chosen because it is transparent, allows you to see the contents clearly, and is easy to clean. Plastic tumblers are lightweight, unbreakable, and more durable, making them ...