WGU C683 Natural Science Lab
Performance Assessment 2026/2027 –
Verified Q&As with Detailed Rationales
(Test Bank Bundle - 37 Questions)
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*QUESTION 1:*
A student is designing a natural science experiment. What is the first step in the scientific method?
A) Make an observation and ask a question
B) Formulate a hypothesis
C) Conduct an experiment
D) Analyze the data
> 🎯 *CORRECT ANSWER:* A) Make an observation and ask a question
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The scientific method begins with observation.
> * *Why Distractors Fail:* Hypothesis, experiment, and analysis come later.
> * *Core Takeaway:* Observations drive scientific inquiry.
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*QUESTION 2:*
A hypothesis is:
A) A testable statement or prediction
B) A proven fact
,C) A conclusion
D) A theory
> 🎯 *CORRECT ANSWER:* A) A testable statement or prediction
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A hypothesis is a proposed explanation that can be tested.
> * *Why Distractors Fail:* It is not a proven fact, conclusion, or theory.
> * *Core Takeaway:* A hypothesis is a testable prediction.
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*QUESTION 3:*
In an experiment, the variable that is changed by the researcher is called the:
A) Independent variable
B) Dependent variable
C) Controlled variable
D) Constant variable
> 🎯 *CORRECT ANSWER:* A) Independent variable
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The independent variable is manipulated.
> * *Why Distractors Fail:* The dependent variable responds; controlled variables are kept constant.
> * *Core Takeaway:* The independent variable is manipulated.
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*QUESTION 4:*
The variable that is measured in an experiment is the:
A) Dependent variable
,B) Independent variable
C) Controlled variable
D) Constant variable
> 🎯 *CORRECT ANSWER:* A) Dependent variable
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The dependent variable is the outcome measured.
> * *Why Distractors Fail:* The independent variable is manipulated; controlled variables are constant.
> * *Core Takeaway:* The dependent variable is measured.
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*QUESTION 5:*
A controlled experiment requires:
A) A control group and an experimental group
B) Only an experimental group
C) Only a control group
D) No groups
> 🎯 *CORRECT ANSWER:* A) A control group and an experimental group
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A control group is needed for comparison.
> * *Why Distractors Fail:* Both groups are necessary for a controlled experiment.
> * *Core Takeaway:* Controlled experiments compare groups.
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*QUESTION 6:*
A student wants to test the effect of light on plant growth. The independent variable is:
, A) Amount of light
B) Plant growth
C) Type of plant
D) Soil type
> 🎯 *CORRECT ANSWER:* A) Amount of light
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Light is the variable being manipulated.
> * *Why Distractors Fail:* Plant growth is the dependent variable; type of plant and soil should be
controlled.
> * *Core Takeaway:* Light is the independent variable.
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*QUESTION 7:*
In the same experiment, the dependent variable is:
A) Plant growth
B) Amount of light
C) Type of plant
D) Temperature
> 🎯 *CORRECT ANSWER:* A) Plant growth
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Plant growth is measured to see the effect of light.
> * *Why Distractors Fail:* Light is independent; type of plant and temperature are controlled.
> * *Core Takeaway:* Plant growth is the dependent variable.
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*QUESTION 8:*
Performance Assessment 2026/2027 –
Verified Q&As with Detailed Rationales
(Test Bank Bundle - 37 Questions)
---
*QUESTION 1:*
A student is designing a natural science experiment. What is the first step in the scientific method?
A) Make an observation and ask a question
B) Formulate a hypothesis
C) Conduct an experiment
D) Analyze the data
> 🎯 *CORRECT ANSWER:* A) Make an observation and ask a question
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The scientific method begins with observation.
> * *Why Distractors Fail:* Hypothesis, experiment, and analysis come later.
> * *Core Takeaway:* Observations drive scientific inquiry.
---
*QUESTION 2:*
A hypothesis is:
A) A testable statement or prediction
B) A proven fact
,C) A conclusion
D) A theory
> 🎯 *CORRECT ANSWER:* A) A testable statement or prediction
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A hypothesis is a proposed explanation that can be tested.
> * *Why Distractors Fail:* It is not a proven fact, conclusion, or theory.
> * *Core Takeaway:* A hypothesis is a testable prediction.
---
*QUESTION 3:*
In an experiment, the variable that is changed by the researcher is called the:
A) Independent variable
B) Dependent variable
C) Controlled variable
D) Constant variable
> 🎯 *CORRECT ANSWER:* A) Independent variable
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The independent variable is manipulated.
> * *Why Distractors Fail:* The dependent variable responds; controlled variables are kept constant.
> * *Core Takeaway:* The independent variable is manipulated.
---
*QUESTION 4:*
The variable that is measured in an experiment is the:
A) Dependent variable
,B) Independent variable
C) Controlled variable
D) Constant variable
> 🎯 *CORRECT ANSWER:* A) Dependent variable
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The dependent variable is the outcome measured.
> * *Why Distractors Fail:* The independent variable is manipulated; controlled variables are constant.
> * *Core Takeaway:* The dependent variable is measured.
---
*QUESTION 5:*
A controlled experiment requires:
A) A control group and an experimental group
B) Only an experimental group
C) Only a control group
D) No groups
> 🎯 *CORRECT ANSWER:* A) A control group and an experimental group
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A control group is needed for comparison.
> * *Why Distractors Fail:* Both groups are necessary for a controlled experiment.
> * *Core Takeaway:* Controlled experiments compare groups.
---
*QUESTION 6:*
A student wants to test the effect of light on plant growth. The independent variable is:
, A) Amount of light
B) Plant growth
C) Type of plant
D) Soil type
> 🎯 *CORRECT ANSWER:* A) Amount of light
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Light is the variable being manipulated.
> * *Why Distractors Fail:* Plant growth is the dependent variable; type of plant and soil should be
controlled.
> * *Core Takeaway:* Light is the independent variable.
---
*QUESTION 7:*
In the same experiment, the dependent variable is:
A) Plant growth
B) Amount of light
C) Type of plant
D) Temperature
> 🎯 *CORRECT ANSWER:* A) Plant growth
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Plant growth is measured to see the effect of light.
> * *Why Distractors Fail:* Light is independent; type of plant and temperature are controlled.
> * *Core Takeaway:* Plant growth is the dependent variable.
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*QUESTION 8:*
