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 ...