Question 1: Explain why a lightweight material would be important for designing a bicycle frame. Include at least two reasons in your answer.

Answer: A lightweight material reduces the overall weight of the bicycle, making it easier to ride and handle. It also improves speed and efficiency, especially for competitive cycling.

Question 2: Identify three different materials that could be used to make a children's toy and explain why each might be suitable or unsuitable.

Answer: Wood - durable and natural, but can splinter; Plastic - lightweight, versatile, but may not be eco-friendly; Metal - strong and durable, but heavy and potentially dangerous if sharp edges are present.

Question 3: Describe the key properties you would consider when choosing a material for a waterproof outdoor lantern.

Answer: Waterproofness, durability, resistance to weathering, light weight, and ability to withstand impact.

Question 4: Draw a simple sketch of a handle for a kitchen knife. Your sketch should show the shape and any features that might improve grip comfort.

Answer: A sketch of a handle with an ergonomic, slightly curved shape to fit the hand comfortably, possibly with textured surface details or finger grooves for better grip.

Question 5: Design a plan for a new storage container that is both lightweight and strong. Describe the material you would choose and justify your choice.

Answer: I would choose a high-density plastic such as polypropylene because it is lightweight, durable, and resistant to impact and chemicals, making it suitable for storage.

Question 6: List three factors to consider when selecting a material for a reusable water bottle. Explain how each factor influences the choice.

Answer: Safety (must be non-toxic and BPA-free), durability (resists impact and wear), and insulation properties (to keep water cold or hot).

Question 7: Sketch a concept for a protective case for a smartphone. Include labels for the main materials you would use for the outer shell and interior padding.

Answer: A sketch showing a hard outer shell made of polycarbonate or silicone, with soft foam or rubber padding inside for shock absorption, labeled accordingly.

Question 8: A company wants to develop a lightweight, eco-friendly shopping bag. Suggest suitable materials and explain your reasoning.

Answer: Recycled PET fabric or biodegradable plant-based materials like cornstarch-based bioplastics, because they are lightweight and environmentally friendly.

Question 9: Identify and explain two disadvantages of using metal as a material for a portable electronic device casing.

Answer: Metal can be heavy, making the device less portable, and it can conduct heat and electricity, potentially causing safety issues or interference with electronic components.

Question 10: Design a plan for testing the strength of a new plastic material intended for sports equipment. Describe the steps you would take.

Answer: Prepare sample pieces of the plastic, subject them to controlled impact tests and tensile strength tests, record the force required to cause failure, and compare results to safety standards.