WGU C165 – INTEGRATED PHYSICAL SCIENCES – PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
Core Domains
The Nature of SciencePhysics: Motion and ForcesPhysics: Energy and MatterChemistry: Atomic Structure and BondingChemistry: Chemical
ReactionsEarth Science: Geology and Plate TectonicsEarth Science: Hydrology and AtmosphereAstronomy: The Solar System and Universe
Introduction
This comprehensive assessment is designed to evaluate a student's mastery of the fundamental principles governing the physical world. The exam
encompasses a broad spectrum of scientific disciplines, including physics, chemistry, earth science, and astronomy, ensuring a holistic
understanding of integrated physical sciences. Through a combination of multiple-choice questions and scenario-based inquiries, the assessment
measures both foundational theoretical knowledge and the ability to apply scientific concepts to real-world situations. With an emphasis on critical
thinking, data interpretation, and ethical scientific practice, this exam prepares candidates for professional decision-making within scientific
frameworks and ensures they possess the analytical skills necessary for academic and career success.
SECTION ONE: QUESTIONS 1–100
1. Which of the following best describes a scientific law?
A. A preliminary explanation of a natural phenomenon.
B. A widely accepted theory that has not yet been proven.
🟢 C. A statement that describes a consistent relationship in nature.
D. A hypothesis that has been tested once.
🔴 RATIONALE: A scientific law is a descriptive statement or equation that reliably predicts events under certain conditions, representing a
consistent pattern observed in the natural world.
2. In a controlled experiment, which variable is deliberately changed by the researcher?
🟢 A. Independent variable
B. Dependent variable
C. Controlled variable
D. Qualitative variable
🔴 RATIONALE: The independent variable is the factor that is manipulated or changed in an experiment to observe its effects on the dependent
variable.
, 3. Which subatomic particle carries a negative electric charge?
A. Proton
B. Neutron
🟢 C. Electron
D. Nucleus
🔴 RATIONALE: Electrons are the negatively charged subatomic particles that orbit the nucleus of an atom.
4. A car travels 150 kilometers in 3 hours. What is the average speed of the car?
A. 30 km/h
B. 45 km/h
🟢 C. 50 km/h
D. 150 km/h
🔴 RATIONALE: Average speed is calculated by dividing total distance by total time (150/3 = 50).
5. Which of the following is a physical change?
🟢 A. Ice melting into water
B. Wood burning in a fireplace
C. Iron rusting in the rain
D. An acid neutralizing a base
🔴 RATIONALE: Physical changes alter the form or state of matter without changing its chemical composition. Melting ice is a change of state from
solid to liquid water.
6. Which Newton's Law states that for every action, there is an equal and opposite reaction?
A. First Law
B. Second Law
🟢 C. Third Law
D. Law of Universal Gravitation
🔴 RATIONALE: Newton's Third Law of Motion establishes that forces always exist in pairs; if object A exerts a force on object B, object B exerts an
equal and opposite force on object A.
7. What is the primary source of energy for Earth's weather systems?
, 🟢 A. Solar radiation
B. Geothermal heat
C. Tidal energy
D. Nuclear fission
🔴 RATIONALE: The Sun provides the energy that drives atmospheric circulation, evaporation, and the heating of Earth's surface, which creates
weather patterns.
8. In the periodic table, elements in the same vertical column are referred to as a:
A. Period
🟢 B. Group
C. Series
D. Metal
🔴 RATIONALE: Vertical columns in the periodic table are called groups or families, and elements within a group typically share similar chemical
properties.
9. Which layer of the Earth is composed primarily of liquid iron and nickel?
A. Crust
B. Mantle
🟢 C. Outer core
D. Inner core
🔴 RATIONALE: The outer core is the only liquid layer of Earth's interior, consisting of molten iron and nickel, which creates Earth's magnetic field.
10. What type of bond is formed when electrons are shared between two atoms?
🟢 A. Covalent bond
B. Ionic bond
C. Metallic bond
D. Hydrogen bond
🔴 RATIONALE: Covalent bonding occurs when atoms share pairs of electrons to achieve a stable electron configuration.
11. Which of the following is a non-renewable energy resource?
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
Core Domains
The Nature of SciencePhysics: Motion and ForcesPhysics: Energy and MatterChemistry: Atomic Structure and BondingChemistry: Chemical
ReactionsEarth Science: Geology and Plate TectonicsEarth Science: Hydrology and AtmosphereAstronomy: The Solar System and Universe
Introduction
This comprehensive assessment is designed to evaluate a student's mastery of the fundamental principles governing the physical world. The exam
encompasses a broad spectrum of scientific disciplines, including physics, chemistry, earth science, and astronomy, ensuring a holistic
understanding of integrated physical sciences. Through a combination of multiple-choice questions and scenario-based inquiries, the assessment
measures both foundational theoretical knowledge and the ability to apply scientific concepts to real-world situations. With an emphasis on critical
thinking, data interpretation, and ethical scientific practice, this exam prepares candidates for professional decision-making within scientific
frameworks and ensures they possess the analytical skills necessary for academic and career success.
SECTION ONE: QUESTIONS 1–100
1. Which of the following best describes a scientific law?
A. A preliminary explanation of a natural phenomenon.
B. A widely accepted theory that has not yet been proven.
🟢 C. A statement that describes a consistent relationship in nature.
D. A hypothesis that has been tested once.
🔴 RATIONALE: A scientific law is a descriptive statement or equation that reliably predicts events under certain conditions, representing a
consistent pattern observed in the natural world.
2. In a controlled experiment, which variable is deliberately changed by the researcher?
🟢 A. Independent variable
B. Dependent variable
C. Controlled variable
D. Qualitative variable
🔴 RATIONALE: The independent variable is the factor that is manipulated or changed in an experiment to observe its effects on the dependent
variable.
, 3. Which subatomic particle carries a negative electric charge?
A. Proton
B. Neutron
🟢 C. Electron
D. Nucleus
🔴 RATIONALE: Electrons are the negatively charged subatomic particles that orbit the nucleus of an atom.
4. A car travels 150 kilometers in 3 hours. What is the average speed of the car?
A. 30 km/h
B. 45 km/h
🟢 C. 50 km/h
D. 150 km/h
🔴 RATIONALE: Average speed is calculated by dividing total distance by total time (150/3 = 50).
5. Which of the following is a physical change?
🟢 A. Ice melting into water
B. Wood burning in a fireplace
C. Iron rusting in the rain
D. An acid neutralizing a base
🔴 RATIONALE: Physical changes alter the form or state of matter without changing its chemical composition. Melting ice is a change of state from
solid to liquid water.
6. Which Newton's Law states that for every action, there is an equal and opposite reaction?
A. First Law
B. Second Law
🟢 C. Third Law
D. Law of Universal Gravitation
🔴 RATIONALE: Newton's Third Law of Motion establishes that forces always exist in pairs; if object A exerts a force on object B, object B exerts an
equal and opposite force on object A.
7. What is the primary source of energy for Earth's weather systems?
, 🟢 A. Solar radiation
B. Geothermal heat
C. Tidal energy
D. Nuclear fission
🔴 RATIONALE: The Sun provides the energy that drives atmospheric circulation, evaporation, and the heating of Earth's surface, which creates
weather patterns.
8. In the periodic table, elements in the same vertical column are referred to as a:
A. Period
🟢 B. Group
C. Series
D. Metal
🔴 RATIONALE: Vertical columns in the periodic table are called groups or families, and elements within a group typically share similar chemical
properties.
9. Which layer of the Earth is composed primarily of liquid iron and nickel?
A. Crust
B. Mantle
🟢 C. Outer core
D. Inner core
🔴 RATIONALE: The outer core is the only liquid layer of Earth's interior, consisting of molten iron and nickel, which creates Earth's magnetic field.
10. What type of bond is formed when electrons are shared between two atoms?
🟢 A. Covalent bond
B. Ionic bond
C. Metallic bond
D. Hydrogen bond
🔴 RATIONALE: Covalent bonding occurs when atoms share pairs of electrons to achieve a stable electron configuration.
11. Which of the following is a non-renewable energy resource?
