STEM Inquiry & Project-Based Labs 3 — Questions and Answers
Question 1: Which of the following BEST describes 'guided inquiry' compared to 'open inquiry'?
- Students design the experiment and the teacher provides the question
- The teacher provides the question and procedure while students collect and analyze data (Correct answer)
- Students receive the data and only write conclusions
- The teacher conducts the experiment while students observe
Correct answer: The teacher provides the question and procedure while students collect and analyze data
In guided inquiry, the teacher supplies the question and procedure, but students perform data collection and draw their own conclusions.
Question 2: A teacher uses a 5E instructional model for a PBL unit on bridges. Which phase involves students constructing and testing their bridge designs?
- Engage
- Explore (Correct answer)
- Explain
- Elaborate
Correct answer: Explore
The Explore phase is where students conduct hands-on investigations and gather firsthand experience with the concept.
Question 3: When teaching experimental design, why is it important for students to use a control group?
- To ensure all variables change simultaneously
- To provide a baseline for comparing the effects of the independent variable (Correct answer)
- To eliminate the need for repeated trials
- To make the experiment shorter and more efficient
Correct answer: To provide a baseline for comparing the effects of the independent variable
A control group serves as the baseline, isolating the effect of the independent variable by holding all other conditions constant.
Question 4: A middle school class is beginning a PBL unit on renewable energy. Which activity BEST activates prior knowledge and sparks inquiry?
- Reading a textbook chapter on solar panels
- Watching a teacher demonstration of a solar-powered device and generating questions (Correct answer)
- Taking a quiz on energy types from last year
- Copying notes from a lecture on fossil fuels
Correct answer: Watching a teacher demonstration of a solar-powered device and generating questions
Demonstration combined with student-generated questioning activates schema and creates authentic curiosity, launching inquiry effectively.
Question 5: Which of the following is an example of a 'fair test' principle that students must apply in lab investigations?
- Changing multiple variables at once to speed up the experiment
- Keeping all variables constant except the one being tested (Correct answer)
- Using different measuring tools for each trial
- Allowing each group member to interpret data independently
Correct answer: Keeping all variables constant except the one being tested
A fair test requires controlling all variables except the independent variable so that results can be attributed to that variable alone.
Question 6: A student team's PBL prototype fails during testing. How should the teacher BEST frame this moment?
- As a failure requiring them to start a new project
- As an opportunity to analyze, iterate, and improve the design (Correct answer)
- As evidence the team needs remediation before continuing
- As a sign the driving question was too difficult
Correct answer: As an opportunity to analyze, iterate, and improve the design
Failure in PBL is integral to the engineering design process—teams analyze what went wrong and iterate toward a better solution.
Question 7: What is the PRIMARY reason STEM teachers ask students to share and compare data across lab groups?
- To identify which group performed the experiment correctly
- To build statistical understanding and identify patterns or variability across trials (Correct answer)
- To reduce the amount of data each student must collect
- To allow faster groups to check slower groups' work
Correct answer: To build statistical understanding and identify patterns or variability across trials
Cross-group data sharing builds understanding of variability, sample size, and pattern recognition—key components of scientific reasoning.
STEM Inquiry & Project-Based Labs 3
Which of the following BEST describes 'guided inquiry' compared to 'open inquiry'?