Ages 5–8🔬 Science17 verified questions on this shelf
Comparing Design Solutions
Analyse data from tests of two objects designed to solve the same problem to compare the strengths and weaknesses of each design
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Question 1 of 3
A team is designing a solar oven for a science fair. Their design criteria are: (1) the oven must reach at least 150°C, (2) the total cost must be $10 or less, and (3) the oven must weigh 2 kg or less. Two design solutions are proposed: - Design A: maximum temperature 160°C, cost $9, weight 2.5 kg. - Design B: maximum temperature 155°C, cost $12, weight 1.8 kg. Using a systematic evaluation of how each design meets the criteria and constraints, which statement is correct?
Question 2 of 3
A team is designing a portable cooler for a field trip. The criteria are: (1) keep ice frozen for at least 4 hours, (2) weigh no more than 1.5 kilograms, and (3) cost no more than $15. The test results for four prototype designs are: Design A: ice lasts 4.5 hours, weight 1.6 kg, cost $14. Design B: ice lasts 3.9 hours, weight 1.4 kg, cost $13. Design C: ice lasts 4.2 hours, weight 1.4 kg, cost $15. Design D: ice lasts 4.3 hours, weight 1.3 kg, cost $16. Which design best meets all of the criteria and constraints?
Question 3 of 3
A team is designing a portable cooler for a school field trip. Their design criteria are: (1) keep a beverage cold for at least 2 hours, (2) weigh no more than 200 grams, and (3) cost no more than $5. They have created two prototype designs with the following data: Design A: keeps drink cold for 3 hours, weighs 180 g, costs $4.50. Design B: keeps drink cold for 2.5 hours, weighs 210 g, costs $4.00. Using a systematic evaluation of each design against the criteria, which statement is correct?
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