Question 1: Define the term 'thermal conductivity' and explain why it is an important property for materials used in cooking utensils.

Answer: Thermal conductivity is the ability of a material to transfer heat. It is important because high thermal conductivity allows cookware to heat quickly and evenly.

Question 2: Identify a suitable material for making a lightweight yet strong bicycle frame and justify your choice based on its properties.

Answer: Aluminium is suitable because it is lightweight, strong, corrosion-resistant, and has good thermal and electrical conductivity.

Question 3: Describe three properties of plastics that make them versatile for product manufacturing.

Answer: Plastics are lightweight, easily mouldable, and resistant to corrosion, making them versatile for various products.

Question 4: Explain the difference between elastic and plastic deformation, providing an example of each in product design.

Answer: Elastic deformation is temporary change in shape that is reversible when the force is removed, e.g., a rubber band stretching. Plastic deformation is permanent, such as bending a metal rod slightly until it stays bent.

Question 5: Design Brief: You are tasked with creating a new lightweight storage container for outdoor use. It must be durable, weather-resistant, and easy to carry. Sketch a basic design for this container, indicating the material you would choose and why.

Answer: A sketch should show a portable container with a handle, made from a weather-resistant plastic or lightweight metal. The design should include features like a secure lid and reinforced edges. The chosen material should be lightweight, durable, and resistant to rain and UV rays.

Question 6: Draw a cross-sectional sketch of a typical thermos flask, labeling the main layers and explaining their purpose.

Answer: A cross-section showing an inner container, a vacuum layer for insulation, and an outer shell. The inner container holds the liquid, the vacuum reduces heat transfer, and the outer shell protects and provides grip.

Question 7: List two environmental considerations when choosing materials for a product intended for outdoor use.

Answer: Materials should be weather-resistant and recyclable or environmentally sustainable to reduce environmental impact.

Question 8: Identify a metal that is commonly used for electrical wiring and describe two of its properties that make it suitable for this purpose.

Answer: Copper is commonly used because it has excellent electrical conductivity and is malleable, allowing it to be bent into wires without breaking.