STEM Scientific Method & Engineering Process 2

Question 1

A student notices that plants near a window grow taller than those in a darker corner. Which step of the scientific method does this observation most directly lead to?

Accepted Answer

Forming a hypothesis

Answer

An observation prompts the formation of a testable hypothesis about the relationship between light and plant growth.

Question 2

In the engineering design process, what is the primary purpose of the 'Define the Problem' phase?

Accepted Answer

To clearly identify constraints, criteria, and the need being addressed

Answer

Defining the problem establishes the criteria for success and the constraints that any solution must satisfy.

Question 3

Which type of variable is deliberately changed by the researcher in a controlled experiment?

Accepted Answer

Independent variable

Answer

The independent variable is the one the experimenter intentionally manipulates to observe its effect on the dependent variable.

Question 4

A research team tests three different bridge designs under identical load conditions. What role do the identical load conditions serve?

Accepted Answer

They serve as controlled variables to ensure a fair test

Answer

Keeping load conditions identical controls extraneous variables so that differences in bridge performance can be attributed to design alone.

Question 5

After testing a prototype, engineers find it fails to meet one of the design criteria. According to the engineering design process, what should happen next?

Accepted Answer

Iterate by revising the design and testing again

Answer

Iteration — revising and retesting — is a core feature of the engineering design process that leads to improved solutions.

(STEM) Certified Science Technology Engineering Mathematics Educator Practice Test

(STEM) Certified Science Technology Engineering Mathematics Educator Practice Test

STEM Scientific Method & Engineering Process 2