The property is called hardness. Materials that can be easily compressed or scratched are considered soft, while those that are difficult to compress or scratch are considered hard.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
Discussion Forum Latest Questions
The saying suggests that not everything that shines is necessarily a metal or valuable; some materials may be made shiny artificially, without having the inherent properties of metals. NCERT Science Textbook Curiosity Science Session 2024-2025.
Non-metallic materials can appear shiny if their surfaces are polished or coated with thin layers of plastic, wax, or other materials that create a shiny finish. Chapter 6 Materials around us Class 6 Class VI NCERT Book Curiosity Science
Examples of non-lustrous materials include paper, wood, rubber, and jute, which do not have shiny surfaces. NCERT Science Textbook Curiosity Science Session 2024-2025.
Some metals lose their lustre due to the effect of air and moisture, which can cause oxidation or tarnishing, making them appear dull or non-lustrous. NCERT Book Curiosity Science Class 6 Class 6 Science NCERT Chapter 6.