Question 1: Explain three different properties of metals that make them suitable for use in structural components.

Answer: Metals are strong and durable, have high tensile strength, and are good conductors of heat and electricity, making them ideal for structural and electrical applications.

Question 2: Describe a situation where a flexible material would be preferred over a rigid one in product design.

Answer: A flexible material is preferred in products like wristbands or phone cases where flexibility ensures comfort and ease of use.

Question 3: Identify and explain two properties that make plastics useful for everyday consumer products.

Answer: Plastics are lightweight and can be easily shaped or moulded, which allows for versatile and cost-effective manufacturing of various products.

Question 4: Design Brief: Create a concept for a lightweight, durable storage container that can be used outdoors. Which material would you choose and why?

Answer: Students should select a material such as polypropylene or polyethylene due to their lightweight, weather resistance, and durability. The explanation should include reasons like resistance to moisture, impact strength, and ease of manufacturing.

Question 5: Sketch a design for a handle that requires a comfortable grip. Indicate in your sketch which material you would use and why.

Answer: The sketch should show an ergonomic handle with a textured or contoured surface for comfort. The answer should specify a material like rubber or silicone for grip and comfort, explaining its non-slip and soft properties.

Question 6: Draw a cross-sectional plan of a lightweight, insulating material suitable for a thermos flask. Label the key layers and materials used.

Answer: A correct sketch would display multiple layers, including an outer shell (plastic or metal), an insulating layer (foam or vacuum), and an inner lining (stainless steel or plastic). Labels should identify each layer and material.

Question 7: Compare and contrast the properties of glass and plastic when used in packaging. Which would you choose for a drink bottle and why?

Answer: Glass is rigid, transparent, and non-reactive but heavy and breakable. Plastic is lightweight, durable, and can be moulded into various shapes but may be less environmentally friendly. For a drink bottle, plastic might be preferred due to its lightweight and durability.

Question 8: Identify a material suitable for making a heat-resistant work surface in a kitchen. Justify your choice based on its properties.

Answer: A suitable material is heat-resistant ceramic or tempered glass because they can withstand high temperatures without damage and are easy to clean.