Give an example of classification based on hardness.

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 items like tires. Hard materials are resistant to scratches and can cut or shape other materials, while soft materials can be easily compressed or shaped. This classification helps in selecting materials for specific uses based on their hardness.

This question related to Chapter 6 Science Curiosity Class 6th NCERT.
From the Chapter 6. Materials Around Us.
Give answer according to your understanding.