Question 1: Explain the difference between a hard and a soft material. Give one example of each.

Answer: Hard materials are rigid and resistant to shape change, such as metal or wood. Soft materials are flexible and easily shaped, like rubber or plastic.

Question 2: Describe a situation where a waterproof material would be essential in a product design.

Answer: A waterproof material is essential in designing a raincoat to keep the wearer dry in wet weather.

Question 3: Identify two properties that make metal suitable for building a sturdy chair.

Answer: Metals are strong and durable, which makes them suitable for supporting weight and lasting over time.

Question 4: Draw a simple sketch of a household object (e.g., a spoon or a key) and label the material you think it is made from. Explain your choice.

Answer: A sketch of a spoon with a handle and bowl, labeled as 'stainless steel', explaining that it is durable, rust-resistant, and suitable for cooking or eating.

Question 5: Design a plan for a small storage box that needs to be lightweight but strong. Which material would you choose and why?

Answer: I would choose plastic because it is lightweight and can be made strong enough for storage purposes.

Question 6: Sketch a design for an eco-friendly shopping bag. Indicate the material you would use and justify your choice.

Answer: A sketch of a tote bag with handles, labeled as 'recycled cotton or jute', justified by its biodegradability and sustainability.

Question 7: What property of foam makes it useful for packaging fragile items?

Answer: Foam is soft and cushioning, which absorbs shocks and protects fragile items during transportation.

Question 8: Design a product that needs to be flexible and comfortable to wear. Describe the material you would select and why.

Answer: I would select a stretchy fabric like elastane or spandex because it is flexible and comfortable for clothing.

Question 9: Identify a material that is good for making outdoor furniture and explain its key properties.

Answer: Treatwood or teak wood is good because it is weather-resistant, durable, and suitable for outdoor conditions.

Question 10: Create a simple plan for a product that requires insulation to keep heat in. Draw a rough sketch of your idea and label the insulating material.

Answer: A sketch of a thermos flask with an inner layer of foam or vacuum insulation, labeled as 'insulating layer' to demonstrate heat retention.

Question 11: Describe the properties of glass that make it useful for windows. What are some limitations of using glass?

Answer: Glass is transparent, hard, and allows light to pass through, making it useful for windows. Limitations include fragility and the potential to break easily.