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WGU C224 – INTEGRATED PHYSICAL
SCIENCES | OBJECTIVE ASSESSMENT
QUESTIONS AND ANSWERS (VERIFIED) |
STUDY GUIDE | LATEST UPDATE 2026/2027 |
PRACTICE QUESTIONS AND ANSWERS |
EXAM REVIEW
Table of Contents
1. The Nature and Process of Science
2. Physics: Forces, Motion, Energy, and Waves
3. Chemistry: Matter, Atoms, and Chemical Reactions
4. Earth Science: Structure, Atmosphere, and Solar System
,Page 2 of 26
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SECTION 1: THE NATURE AND PROCESS OF SCIENCE (Q1–Q20)
Question 1: A scientist proposes the statement: "All living organisms are composed of cells."
This statement has been tested and confirmed through countless observations and
experiments over centuries. Which type of scientific statement is this?
A. Hypothesis
B. Theory
C. Law
D. Observation
Correct Answer: B. Theory
A scientific theory is a well-developed explanation that has been thoroughly tested and is
supported by a large body of scientific evidence. It explains why and how things happen. A
hypothesis is a testable prediction; a law describes a specific pattern in nature.
Question 2: Kepler discovered that planets move in elliptical paths around the sun. Repeated
observations have confirmed this finding. Which type of scientific statement is Kepler's
discovery?
A. Hypothesis
B. Theory
C. Law
D. Model
Correct Answer: C. Law
A scientific law is a concise statement supported by scientific evidence and repeated
experiments that describes a widespread pattern in nature. Kepler's laws of planetary motion
describe the predictable patterns of planetary orbits, which have been repeatedly confirmed
through observation.
Question 3: A researcher states: "If a plant receives more sunlight, then it will grow taller."
This statement is best described as a:
A. Law
B. Theory
C. Hypothesis
D. Principle
, Page 3 of 26
Correct Answer: C. Hypothesis
A hypothesis is a testable statement about how something in nature works. It is a prediction
that can be tested through experimentation and observation.
Question 4: Which principle states that only falsifiable statements can be subject to scientific
inquiry?
A. Principle of verification
B. Principle of falsification
C. Principle of parsimony
D. Principle of uniformity
Correct Answer: B. Principle of falsification
The principle of falsification states that only falsifiable statements can be subject to scientific
inquiry. A statement such as "a rock falls because invisible demons pull it down" is not
falsifiable because no conceivable experiment or observation could prove that invisible
demons are not pulling it.
Question 5: In an experiment, the variable that is changed by the experimenter is called the:
A. Dependent variable
B. Control variable
C. Independent variable
D. Constant variable
Correct Answer: C. Independent variable
The independent variable is the variable that is changed or manipulated by the experimenter.
The dependent variable is what is measured and changes because of the independent
variable.
Question 6: A smaller or larger physical copy of an object that you can interact with is called
a:
A. Conceptual model
B. Mathematical model
C. Physical model
D. Computer model
Correct Answer: C. Physical model
A physical model is a smaller or larger physical copy of an object. Prototypes and appearance
models are examples of physical models. Conceptual models are used to visualize things that
cannot be seen; mathematical models use formulas and graphs.
Question 7: Which type of model uses formulas, graphs, or other mathematical means to
represent physical characteristics?
A. Physical model
B. Conceptual model
WGU C224 – INTEGRATED PHYSICAL
SCIENCES | OBJECTIVE ASSESSMENT
QUESTIONS AND ANSWERS (VERIFIED) |
STUDY GUIDE | LATEST UPDATE 2026/2027 |
PRACTICE QUESTIONS AND ANSWERS |
EXAM REVIEW
Table of Contents
1. The Nature and Process of Science
2. Physics: Forces, Motion, Energy, and Waves
3. Chemistry: Matter, Atoms, and Chemical Reactions
4. Earth Science: Structure, Atmosphere, and Solar System
,Page 2 of 26
\
SECTION 1: THE NATURE AND PROCESS OF SCIENCE (Q1–Q20)
Question 1: A scientist proposes the statement: "All living organisms are composed of cells."
This statement has been tested and confirmed through countless observations and
experiments over centuries. Which type of scientific statement is this?
A. Hypothesis
B. Theory
C. Law
D. Observation
Correct Answer: B. Theory
A scientific theory is a well-developed explanation that has been thoroughly tested and is
supported by a large body of scientific evidence. It explains why and how things happen. A
hypothesis is a testable prediction; a law describes a specific pattern in nature.
Question 2: Kepler discovered that planets move in elliptical paths around the sun. Repeated
observations have confirmed this finding. Which type of scientific statement is Kepler's
discovery?
A. Hypothesis
B. Theory
C. Law
D. Model
Correct Answer: C. Law
A scientific law is a concise statement supported by scientific evidence and repeated
experiments that describes a widespread pattern in nature. Kepler's laws of planetary motion
describe the predictable patterns of planetary orbits, which have been repeatedly confirmed
through observation.
Question 3: A researcher states: "If a plant receives more sunlight, then it will grow taller."
This statement is best described as a:
A. Law
B. Theory
C. Hypothesis
D. Principle
, Page 3 of 26
Correct Answer: C. Hypothesis
A hypothesis is a testable statement about how something in nature works. It is a prediction
that can be tested through experimentation and observation.
Question 4: Which principle states that only falsifiable statements can be subject to scientific
inquiry?
A. Principle of verification
B. Principle of falsification
C. Principle of parsimony
D. Principle of uniformity
Correct Answer: B. Principle of falsification
The principle of falsification states that only falsifiable statements can be subject to scientific
inquiry. A statement such as "a rock falls because invisible demons pull it down" is not
falsifiable because no conceivable experiment or observation could prove that invisible
demons are not pulling it.
Question 5: In an experiment, the variable that is changed by the experimenter is called the:
A. Dependent variable
B. Control variable
C. Independent variable
D. Constant variable
Correct Answer: C. Independent variable
The independent variable is the variable that is changed or manipulated by the experimenter.
The dependent variable is what is measured and changes because of the independent
variable.
Question 6: A smaller or larger physical copy of an object that you can interact with is called
a:
A. Conceptual model
B. Mathematical model
C. Physical model
D. Computer model
Correct Answer: C. Physical model
A physical model is a smaller or larger physical copy of an object. Prototypes and appearance
models are examples of physical models. Conceptual models are used to visualize things that
cannot be seen; mathematical models use formulas and graphs.
Question 7: Which type of model uses formulas, graphs, or other mathematical means to
represent physical characteristics?
A. Physical model
B. Conceptual model
