Density affects a material’s weight and strength. High-density materials are heavier and stronger, making them suitable for load-bearing applications. Low-density materials are lighter and often used where weight reduction is important, like in packaging.
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Flexibility allows materials to bend or stretch without breaking. This property is useful for items like rubber bands and fabrics that need to adapt to various shapes and movements, enhancing their functionality and usability.
Fabric is suitable for clothing due to its comfort, breathability, and ability to be dyed or patterned. It can be made from natural fibers like cotton or synthetic fibers like polyester, offering various qualities.
Biodegradable materials break down naturally, reducing environmental impact and waste. They decompose into non-toxic substances, helping to minimize pollution and contribute to sustainability by returning nutrients to the soil.
Transparency allows light to pass through a material, which is useful for windows, lenses, and screens. Materials like glass and clear plastics are chosen for applications requiring visibility and illumination.
Metals are suitable for construction because of their strength, durability, and ability to withstand heavy loads. They are also malleable and can be shaped into various forms, making them ideal for structural elements.
Rubber is used for tires, seals, and footwear due to its flexibility and elasticity. It provides grip, cushioning, and protection, making it essential for various applications in everyday products and machinery.
Tape and rod measure length like a scale but are more flexible and suited for different contexts. “Char angula” refers to an old measurement unit, meaning “four fingers” or roughly 7-10 cm, used in traditional contexts.
The meter is convenient for measuring lengths like a railway track, but not for smaller measurements such as the thickness of a book page. For small lengths, units like millimeters are more precise.
If the ends of the scale are broken, measure from a known reference point to a point along the scale. Use a piece of string or another ruler to measure the length accurately from these points.