Engineering Design Process — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A engineer solve problem by design new thing.
Corrected: An engineer solves problems by designing new things.
Grade 3 grammar: singular subjects use 'solves'; 'an' comes before vowel sounds.
2. Fix the sentence:
Engineers ask about the problem before they builds it.
Corrected: Engineers ask about the problem before they build it.
Grade 3 subject-verb agreement: 'they build', not 'they builds'.
3. Fix the sentence:
The first steps of the design cycle is asking a question.
Corrected: The first step of the design cycle is asking a question.
Grade 3 agreement: 'step' is singular, so use 'step' with 'is'.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. An engineer is a person who designs things to solve problems.
Grade 3 vocabulary: engineers use the design process to solve problems.
2. The first step of the design cycle is to ask what the problem is.
Grade 3 NGSS 3-5-ETS1: engineers first ask to understand the problem.
3. After planning, engineers build a model called a prototype.
Grade 3 vocabulary: a prototype is an early model used to test an idea.
4. After testing, engineers improve the design to make it better.
Grade 3 NGSS 3-5-ETS1: the last cycle step is to improve the design.
Part C: True or False?
Read each statement. Circle True or False.
1. Engineers follow steps called the engineering design process.
True False
Grade 3 NGSS 3-5-ETS1: engineers use a process to solve problems.
2. Engineers only need one try to make a perfect design.
True False
Grade 3 science: engineers iterate and improve across many tries.
3. A prototype is a model used to test a design idea.
True False
Grade 3 vocabulary: prototypes let engineers test before final building.