Engineering Design Challenges — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Imagine step means we picks just one idea fast.
Corrected: Imagine step means we brainstorm many ideas first.
Imagine is brainstorming many possible solutions before choosing one to plan.
2. Fix the sentence:
During Create, the engineer drawed a careful sketch only.
Corrected: During Create, the engineer builds a careful prototype.
Sketches happen in Plan, while building a real model happens in Create.
3. Fix the sentence:
The team weren't allowed to spend more than ten dollars.
Corrected: The team was not allowed to spend more than ten dollars.
Team is treated as a single unit here, so the singular verb was is correct.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Brainstorming many possible ideas happens during the Imagine step.
Imagine generates many options so the strongest idea can be chosen later.
2. Building a real model from materials happens in the Create step.
Create makes the planned design real so it can be tested fairly.
3. After testing, fixing weak parts happens in the Improve step.
Improve uses test results to upgrade the design and try again.
4. A bridge that must hold 5 pounds shows a clear criterion.
Holding 5 pounds is a measurable goal, which makes it a criterion.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Why do engineers usually repeat the design process more than once?
Sample answer: Tests often reveal problems, so engineers improve and retest until the design meets all criteria within the constraints.
Repeating the cycle helps every design get safer, stronger, and more useful.
2. Give one example of a criterion and one constraint for a paper bridge.
Sample answer: A criterion could be holding three coins, while a constraint could be using only one sheet of paper.
Pairing them shows how engineers balance success goals with real limits.