C15 Using Our Resources

Question 1

Properties of ceramics

Answer 1

Ceramics are hard, brittle, heat-resistant materials that are excellent insulators. They are used in construction (bricks, tiles), cookware, electronics (capacitors, insulators), and medical implants. Their resistance to corrosion and wear makes them ideal for industrial applications. Examples include porcelain, alumina, and silicon carbide.

Question 2

Properties of composites

Answer 2

Composites combine two or more materials to enhance strength, durability, and resistance to wear. They are lightweight yet strong, making them ideal for aerospace, automotive, sports equipment, and construction. Common examples include fiberglass (glass fibers in resin), carbon fiber, and concrete

Question 3

Properies of polymers

Answer 3

Polymers are lightweight, flexible, and resistant to chemicals. They are used in packaging, clothing, medical devices, and consumer goods. Some are durable like nylon and polyethylene, while others, like biodegradable plastics, break down easily. Examples include PVC, polyethylene, and polystyrene.

Question 4

Properties of alloys

Answer 4

Alloys are metal mixtures designed for improved strength, durability, and corrosion resistance. They are widely used in construction, transportation, and tools. Common examples include steel (iron and carbon), brass (copper and zinc), and bronze (copper and tin).

Question 5

Properties of glass

Answer 5

Glass is a transparent, brittle material made from silica. It is used in windows, bottles, fiber optics, and laboratory equipment. Types include soda-lime glass (everyday use), borosilicate glass (heat-resistant), and tempered glass (stronger, used for safety).