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.
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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.
A lustrous appearance means the material has a shiny surface that reflects light, which is a characteristic commonly found in metals. Class VI NCERT Book Curiosity Science Session 2024-2025.
Grouping materials based on appearance helps in understanding their properties and potential uses, as well as identifying similarities and differences among various materials. NCERT Book Curiosity Science Class 6 Chapter 6 Materials around us Class 6
Metals like iron, copper, and aluminium might be grouped together because they often share properties like shine, hardness, and conductivity, which make them different from non-metals like wood or paper. NCERT Book Curiosity Science Class 6 Chapter 6 Materials around ...
Common textures include smooth (like aluminium foil), rough (like unpolished wood), and grainy (like chalk). NCERT Science Textbook Curiosity Science Session 2024-2025.
A material that shines will reflect light, appearing glossy or metallic, unlike dull materials that do not reflect light as much. Chapter 6 Materials around us Class 6 Class VI NCERT Book Curiosity Science
Answer: The purpose is to observe and compare their properties, such as shine, texture, and color, and to group them based on these characteristics. NCERT Book Curiosity Science Class 6 Class 6 Science NCERT Chapter 6