Question 1: Define the term 'durability' as it relates to materials used in product design.

Answer: Durability refers to a material's ability to withstand wear, pressure, or damage over time without breaking or deteriorating.

Question 2: Identify which material would be most suitable for making a lightweight bicycle frame and justify your choice based on its properties.

Answer: Aluminium would be suitable because it is lightweight, strong, and resistant to corrosion, making it ideal for bicycle frames.

Question 3: Describe two properties of plastic that make it useful for consumer products.

Answer: Plastic is lightweight and can be easily molded into various shapes, making it versatile for producing different consumer products.

Question 4: Explain why metal is often used for making cooking utensils. Mention at least two properties in your answer.

Answer: Metal is used because it conducts heat efficiently and is durable, which helps in even cooking and long-lasting utensils.

Question 5: A company wants to design a waterproof outdoor storage box. Which material would you recommend and why?

Answer: Polyethylene or plastic would be recommended because they are waterproof, resistant to weather conditions, and durable for outdoor use.

Question 6: Design Brief: Create a concept for a lightweight yet sturdy shopping basket. Consider the properties of materials you might use.

Answer: Students should sketch a basket with a frame made of lightweight metal or strong plastic, considering the need for strength and ease of carrying. The sketch should show handles, a basket shape, and note the chosen materials.

Question 7: Sketch a simple cross-section of a material that is both flexible and strong. Label the key properties in your sketch.

Answer: The sketch should depict a layered structure such as a composite material, with labels indicating 'flexibility' and 'strength'. For example, a rubber layer bonded to a fiber-reinforced layer.

Question 8: Explain the difference between thermal conductivity and electrical conductivity. Provide one example of a material for each property.

Answer: Thermal conductivity is a material's ability to conduct heat; for example, copper. Electrical conductivity is a material's ability to conduct electricity; for example, silver.

Question 9: Identify a material suitable for making a child's toy that needs to be soft, lightweight, and safe. Justify your choice.

Answer: Silicone rubber would be suitable because it is soft, lightweight, flexible, and safe for children.

Question 10: Describe the key properties a material must have if it is to be used in making a weatherproof outdoor sign. Consider durability and appearance.

Answer: The material should be weather-resistant, durable against sunlight and rain, and capable of holding printed or painted designs clearly over time.