Uses of Metal - Gold, Copper, Aluminium & Steel

The video explores the uses of metals, focusing on their properties and applications. It discusses unreactive metals like gold and silver, highlighting their use in jewelry due to their resistance to tarnishing. Copper is noted for its conductivity and malleability, making it ideal for electrical wiring and plumbing. Aluminum's reactivity with oxygen forms a protective layer, useful in transportation industries. Steel, a combination of iron and carbon, revolutionized construction due to its strength and affordability. The video concludes by summarizing the diverse applications of metals based on their unique properties.

Which property of gold and silver makes them ideal for use in jewelry?

• High reactivity with air

• Resistance to tarnishing

• High density

• Ability to conduct heat

Why is copper commonly used in electrical wiring?

• It is a good conductor of electricity

• It is very dense

• It is highly reactive

• It is expensive

What characteristic of aluminum makes it suitable for use in the aerospace industry?

• High density

• High cost

• Ability to rust

• Lightweight nature

How does aluminum protect itself from corrosion?

• By being painted regularly

• By being highly reactive

• By reacting with water

• By forming a layer of aluminum oxide

What is the main advantage of steel over iron in construction?

• Steel is less durable

• Steel is stronger

• Steel is weaker

• Steel is more expensive