Metals are strong, hard, and durable. They are good conductors of heat and electricity, making them ideal for tools, machinery, and electrical wiring. Metals are also malleable and can be shaped easily.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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Wood is useful because it is strong, durable, and can be easily shaped. It is used in construction, furniture making, and as fuel. Its natural availability makes it a widely used material.
Man-made materials are those created by humans through chemical processes, like plastic, glass, and synthetic fibers. These materials are designed to have specific properties for particular uses, like durability or flexibility.
Natural materials are those that come directly from nature, like wood from trees, cotton from plants, and metals from the earth. They are used in their natural form or with minimal processing.
Materials are substances used to make objects around us. They can be natural, like wood, or man-made, like plastic. Everything we use daily is made from some kind of material.
The environmental impact of materials varies; for example, plastics contribute to pollution, while metals require mining and energy for production. Sustainable practices aim to reduce negative impacts and promote recycling and reuse.
Materials in technology provide essential properties like conductivity, strength, and flexibility. For example, semiconductors are used in electronics, while metals and polymers are used in various devices for their specific characteristics.
Materials are used in everyday life for various purposes, such as clothing (cotton, wool), housing (bricks, cement), and transportation (metal, plastic). They play a key role in making daily tasks and objects functional.
Opaque materials do not allow light to pass through them. This occurs because their internal structure scatters or absorbs light, preventing visibility through the material. Examples include wood, metal, and concrete.
Transparency is the property of a material that allows light to pass through it. Materials like glass, clear plastic, and some types of crystal are transparent, allowing us to see through them.