WGU D671 Elementary Science Curriculum Objective
Assessment Actual Exam 2026/2027 | Comprehensive
Review with Detailed Rationales | Pass Guaranteed – A+
Graded
Section 1: Physical Science (Matter, Energy, Forces, Motion) — 10 Questions
Q1. Which property of matter describes the amount of space an object takes up?
A. Mass
B. Weight
C. Volume [CORRECT]
D. Density
Correct Answer: C
Rationale: Correct because volume is defined as the amount of three-dimensional space
an object occupies; mass measures the amount of matter, weight measures
gravitational pull, and density is mass per unit volume.
Q2. A student heats a beaker of water until bubbles form throughout the liquid and it
changes to steam. Which state change is occurring?
A. Melting
B. Evaporation
,C. Boiling [CORRECT]
D. Condensation
Correct Answer: C
Rationale: Correct because boiling occurs when a liquid changes to gas throughout the
entire liquid at its boiling point; evaporation happens only at the surface and below
boiling point, while melting is solid to liquid and condensation is gas to liquid.
Q3. A teacher cuts a sheet of paper into small pieces. A student claims this is a
chemical change because the paper is "destroyed." Which statement BEST corrects this
misconception?
A. The paper burned, so it is a chemical change.
B. The pieces are still paper; only the shape changed, making this a physical change.
[CORRECT]
C. Cutting paper always produces a new substance.
D. The paper's mass was lost during cutting.
Correct Answer: B
Rationale: Correct because cutting paper into pieces changes its size and shape but
does not alter its chemical composition or create a new substance; this is a physical
change, and the student is confusing physical alteration with destruction of matter.
Q4. Which form of energy is stored in a stretched rubber band?
A. Kinetic energy
B. Thermal energy
, C. Potential energy [CORRECT]
D. Sound energy
Correct Answer: C
Rationale: Correct because potential energy is stored energy due to an object's position
or condition; a stretched rubber band stores elastic potential energy, whereas kinetic
energy is energy of motion.
Q5. A pot of soup heats on a stove burner. Warm soup rises, cools at the surface, and
sinks back down. Which method of thermal energy transfer does this demonstrate?
A. Conduction
B. Convection [CORRECT]
C. Radiation
D. Insulation
Correct Answer: B
Rationale: Correct because convection is heat transfer through the movement of fluids
(liquids or gases) due to density differences; conduction requires direct contact
between solids, and radiation transfers heat through electromagnetic waves without
matter.
Q6. Two students push a box from opposite sides with equal force. The box does not
move. Which concept explains this observation?
A. Newton's First Law; the forces are balanced. [CORRECT]
B. Newton's Second Law; acceleration is zero.
Assessment Actual Exam 2026/2027 | Comprehensive
Review with Detailed Rationales | Pass Guaranteed – A+
Graded
Section 1: Physical Science (Matter, Energy, Forces, Motion) — 10 Questions
Q1. Which property of matter describes the amount of space an object takes up?
A. Mass
B. Weight
C. Volume [CORRECT]
D. Density
Correct Answer: C
Rationale: Correct because volume is defined as the amount of three-dimensional space
an object occupies; mass measures the amount of matter, weight measures
gravitational pull, and density is mass per unit volume.
Q2. A student heats a beaker of water until bubbles form throughout the liquid and it
changes to steam. Which state change is occurring?
A. Melting
B. Evaporation
,C. Boiling [CORRECT]
D. Condensation
Correct Answer: C
Rationale: Correct because boiling occurs when a liquid changes to gas throughout the
entire liquid at its boiling point; evaporation happens only at the surface and below
boiling point, while melting is solid to liquid and condensation is gas to liquid.
Q3. A teacher cuts a sheet of paper into small pieces. A student claims this is a
chemical change because the paper is "destroyed." Which statement BEST corrects this
misconception?
A. The paper burned, so it is a chemical change.
B. The pieces are still paper; only the shape changed, making this a physical change.
[CORRECT]
C. Cutting paper always produces a new substance.
D. The paper's mass was lost during cutting.
Correct Answer: B
Rationale: Correct because cutting paper into pieces changes its size and shape but
does not alter its chemical composition or create a new substance; this is a physical
change, and the student is confusing physical alteration with destruction of matter.
Q4. Which form of energy is stored in a stretched rubber band?
A. Kinetic energy
B. Thermal energy
, C. Potential energy [CORRECT]
D. Sound energy
Correct Answer: C
Rationale: Correct because potential energy is stored energy due to an object's position
or condition; a stretched rubber band stores elastic potential energy, whereas kinetic
energy is energy of motion.
Q5. A pot of soup heats on a stove burner. Warm soup rises, cools at the surface, and
sinks back down. Which method of thermal energy transfer does this demonstrate?
A. Conduction
B. Convection [CORRECT]
C. Radiation
D. Insulation
Correct Answer: B
Rationale: Correct because convection is heat transfer through the movement of fluids
(liquids or gases) due to density differences; conduction requires direct contact
between solids, and radiation transfers heat through electromagnetic waves without
matter.
Q6. Two students push a box from opposite sides with equal force. The box does not
move. Which concept explains this observation?
A. Newton's First Law; the forces are balanced. [CORRECT]
B. Newton's Second Law; acceleration is zero.
