NAEP - National Assessment of Educational Progress Technology and Engineering Literacy Grade 6 — Questions and Answers
Question 1: A student notices that her school's water fountain wastes water by running continuously. She measures the flow rate, researches low-flow valve options, and proposes a solution to the principal. Which step of the engineering design process does her research phase best represent?
- Testing and evaluating a prototype
- Defining the problem and gathering information (Correct answer)
- Communicating the final solution
- Manufacturing the chosen design
Correct answer: Defining the problem and gathering information
Researching low-flow valve options after identifying the problem falls squarely in the 'define and research' phase, where engineers gather information needed to generate informed solutions.
Question 2: Which of the following best explains why algorithms are important in technology systems?
- They provide the electrical power needed to run computers
- They are step-by-step instructions that tell a system how to complete a task (Correct answer)
- They store data permanently so it can be retrieved later
- They connect devices to the internet wirelessly
Correct answer: They are step-by-step instructions that tell a system how to complete a task
An algorithm is a precise, ordered set of instructions that a computer or system follows to accomplish a specific task, making them fundamental to how all software functions.
Question 3: A city is redesigning its public transportation network. Engineers create a computer model that tests dozens of route combinations before any physical changes are made. What is the main advantage of this approach?
- It eliminates the need for public input entirely
- It allows problems to be identified and fixed at lower cost before real-world implementation (Correct answer)
- It guarantees the final design will have no flaws
- It replaces the need for trained engineers on the project
Correct answer: It allows problems to be identified and fixed at lower cost before real-world implementation
Computer modeling lets engineers explore and correct design flaws virtually, which is far less expensive and disruptive than discovering those problems after infrastructure has already been built.
Question 4: Which of the following scenarios is the best example of a system with feedback?
- A disposable camera that takes one photograph
- A thermostat that turns heating on when room temperature drops below a set point (Correct answer)
- A printed map showing highway routes
- A manual hand pump used to draw water from a well
Correct answer: A thermostat that turns heating on when room temperature drops below a set point
A thermostat continuously monitors room temperature and uses that information (feedback) to control the heating system, adjusting its output based on current conditions.
Question 5: What does 'iterative design' mean in an engineering context?
- Designing a product only once and immediately manufacturing it at large scale
- Repeatedly testing and improving a design based on results from each trial (Correct answer)
- Copying an existing product design without modification
- Assigning different parts of a design to separate teams with no communication
Correct answer: Repeatedly testing and improving a design based on results from each trial
Iterative design involves cycles of building, testing, evaluating results, and refining the design — each round of feedback improves the product until it meets the desired criteria.
Question 6: A student wants to compare which of three different insulating materials best keeps a container of hot water warm over 30 minutes. She uses identical containers, the same starting water temperature, and measures temperature every 5 minutes. What is the purpose of keeping the containers and starting temperature the same?
- To make the experiment finish faster
- To control variables so differences in results can be attributed to the insulating material alone (Correct answer)
- To ensure all three materials absorb the same amount of heat
- To prevent the water from cooling at all during the test
Correct answer: To control variables so differences in results can be attributed to the insulating material alone
Controlling variables (using identical containers and starting conditions) isolates the independent variable — the insulating material — so any difference in outcome can be reliably linked to the material being tested.
NAEP - National Assessment of Educational Progress Technology and Engineering Literacy Grade 6
A student notices that her school's water fountain wastes water by running continuously.
She measures the flow rate, researches low-flow valve options, and proposes a solution to the principal.
Which step of the engineering design process does her research phase best represent?