Plastic is lightweight, durable, flexible, and resistant to water and chemicals. It’s also easy to mold into different shapes, making it ideal for a wide range of products, from packaging to electronics.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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Plastic is made from petrochemicals through a process called polymerization. This involves combining small molecules, called monomers, into long chains to form polymers, which are then molded into various shapes.
Choosing the right material ensures that an object performs its intended function effectively. For example, metal is used for tools because it’s strong, while rubber is used for tires because it’s flexible.
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.
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.