From the chapter “Materials Around Us,” I learned about the various types of materials, their properties, and how these characteristics influence their uses in everyday life, helping us understand the importance of material selection.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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The choice of material for making an object depends on factors like strength, durability, weight, cost, appearance and intended use. These properties determine how well the material meets the functional and aesthetic requirements of the object.
Sports balls vary in size, color, and texture, affecting their performance. For example, basketballs are larger and textured for grip, while tennis balls are smaller and lightweight. Specific materials enhance durability and behavior in each sport.
The statement means that not everything that appears attractive or valuable is genuinely so. Many objects may shine or look appealing, but their true worth or quality may be deceptive and not live up to expectations.
Yes, some materials can be scratched more easily than others due to differences in hardness. Softer materials, like plastic or wood, are more susceptible to scratches, while harder materials, like metal or glass, resist scratching better.
Ghulan, Sheeta, and Sara chose their hiding spots based on visibility. Ghulan hid behind a wall for complete concealment, Sheeta used a big tree for cover and Sara relied on the frosted glass to obscure her outline.
No, Sheeta’s brother cannot see through a closed wooden window. Wood is an opaque material, preventing light from passing through. This means he cannot view Sheeta, Ghulan or Sara hiding outside.
Yes, water is transparent, allowing light to pass through easily. It can be made opaque by adding substances like milk, mud or paint, which scatter light and prevent visibility through the liquid.
Water is essential for our body’s functioning because it acts as a solvent, dissolving various substances like salts, sugars and nutrients. This property facilitates chemical reactions and nutrient transport, vital for maintaining health.
No, not everything you put in water disappears. Some substances dissolve completely, like salt and sugar, while others, such as sand or oil, do not dissolve and remain visible or separate from the water.