WGU C165 Integrated Physical Sciences – Earth
& Sky OA 100 Practice Questions & ,, Resolution
Result Verified Answers ,,,s
(2026 Update)
Part 1: Gravity, Motion, and Orbits (Questions 1-25)
Q1. According to Newton's law of universal gravitation, which types of objects
does gravity act to produce a force on?
• A. Between small objects and Earth only
• B. Between planets only
• C. Between a star and a planet
• D. Between every pair of objects
,, Resolution Result Verified Answers ,,,: D. Between every pair of objects —
Newton's law of universal gravitation states that gravity acts between every pair of
objects with mass .
Q2. What happens to the force of gravity when two objects are closer to one
another?
• A. It becomes smaller
• B. It remains the same
• C. It becomes greater
• D. It becomes zero
,,, Resolution Result Verified Answers ,,,: C. It becomes greater —
Gravitational force increases as distance decreases .
Q3. What happens to the force of gravity if the mass of either object is greater?
• A. It becomes smaller
• B. It remains the same
• C. It becomes greater
• D. It reverses direction
,, Resolution Result Verified Answers ,,,: C. It becomes greater —
Gravitational force is proportional to the product of masses .
Q4. What force accounts for Earth's moon moving in a nearly circular path around
Earth?
• A. Gravity between Earth and the sun
• B. Gravity between Earth and the moon
• C. Gravity between the moon and the sun
• D. Magnetic force
,, Resolution Result Verified Answers ,,,: B. Gravity between Earth and the
moon — The gravitational force between Earth and the moon keeps the moon in
orbit .
Q5. If the distance between two objects is doubled, what happens to the
gravitational force between them?
, • A. It doubles
• B. It becomes half as strong
• C. It becomes one-fourth as strong
• D. It becomes four times as strong
,, Resolution Result Verified Answers ,,,: C. It becomes one-fourth as strong
— Gravitational force is inversely proportional to the square of the distance
(inverse-square law).
Q6. If the mass of one object is doubled, what happens to the gravitational force
between two objects?
• A. It doubles
• B. It halves
• C. It quadruples
• D. It stays the same
,, Resolution Result Verified Answers ,,,: A. It doubles — Force is directly
proportional to mass.
Q7. Newton's laws of motion and the law of universal gravitation account for how
Earth moves around the sun. Acceleration is a change of velocity. What can
acceleration involve? (Select all that apply)
• A. A decrease in speed
• B. An increase in speed
• C. Moving at constant speed or direction
• D. A change in direction of motion
, ,, Resolution Result Verified Answers ,,,: A, B, D — Acceleration includes any
change in speed (increase or decrease) OR change in direction .
Q8. Based on the "Gravity and Orbits" simulation, what would you expect to
happen to the moon if Earth's mass is doubled?
• A. The moon would spin off into space
• B. The moon would eventually crash into Earth
• C. The moon's orbit would become unpredictable
• D. The moon would remain unchanged
,, Resolution Result Verified Answers ,,,: B. The moon would eventually crash
into Earth — Increased Earth mass increases gravitational pull .
Q9. What would happen to a planet's motion if the force of gravity between the
planet and its star was suddenly turned off?
• A. The planet would stop moving
• B. The planet would spiral away from the star
• C. The planet would move in a straight line
• D. The planet would spiral inward toward the star
,, Resolution Result Verified Answers ,,,: C. The planet would move in a
straight line — Without gravity, Newton's first law states objects continue in
straight-line motion .
Q10. A spacecraft encounters a cloud of gas particles. As the force of gravity pulls
these particles closer together, what happens to the density of the gas?
& Sky OA 100 Practice Questions & ,, Resolution
Result Verified Answers ,,,s
(2026 Update)
Part 1: Gravity, Motion, and Orbits (Questions 1-25)
Q1. According to Newton's law of universal gravitation, which types of objects
does gravity act to produce a force on?
• A. Between small objects and Earth only
• B. Between planets only
• C. Between a star and a planet
• D. Between every pair of objects
,, Resolution Result Verified Answers ,,,: D. Between every pair of objects —
Newton's law of universal gravitation states that gravity acts between every pair of
objects with mass .
Q2. What happens to the force of gravity when two objects are closer to one
another?
• A. It becomes smaller
• B. It remains the same
• C. It becomes greater
• D. It becomes zero
,,, Resolution Result Verified Answers ,,,: C. It becomes greater —
Gravitational force increases as distance decreases .
Q3. What happens to the force of gravity if the mass of either object is greater?
• A. It becomes smaller
• B. It remains the same
• C. It becomes greater
• D. It reverses direction
,, Resolution Result Verified Answers ,,,: C. It becomes greater —
Gravitational force is proportional to the product of masses .
Q4. What force accounts for Earth's moon moving in a nearly circular path around
Earth?
• A. Gravity between Earth and the sun
• B. Gravity between Earth and the moon
• C. Gravity between the moon and the sun
• D. Magnetic force
,, Resolution Result Verified Answers ,,,: B. Gravity between Earth and the
moon — The gravitational force between Earth and the moon keeps the moon in
orbit .
Q5. If the distance between two objects is doubled, what happens to the
gravitational force between them?
, • A. It doubles
• B. It becomes half as strong
• C. It becomes one-fourth as strong
• D. It becomes four times as strong
,, Resolution Result Verified Answers ,,,: C. It becomes one-fourth as strong
— Gravitational force is inversely proportional to the square of the distance
(inverse-square law).
Q6. If the mass of one object is doubled, what happens to the gravitational force
between two objects?
• A. It doubles
• B. It halves
• C. It quadruples
• D. It stays the same
,, Resolution Result Verified Answers ,,,: A. It doubles — Force is directly
proportional to mass.
Q7. Newton's laws of motion and the law of universal gravitation account for how
Earth moves around the sun. Acceleration is a change of velocity. What can
acceleration involve? (Select all that apply)
• A. A decrease in speed
• B. An increase in speed
• C. Moving at constant speed or direction
• D. A change in direction of motion
, ,, Resolution Result Verified Answers ,,,: A, B, D — Acceleration includes any
change in speed (increase or decrease) OR change in direction .
Q8. Based on the "Gravity and Orbits" simulation, what would you expect to
happen to the moon if Earth's mass is doubled?
• A. The moon would spin off into space
• B. The moon would eventually crash into Earth
• C. The moon's orbit would become unpredictable
• D. The moon would remain unchanged
,, Resolution Result Verified Answers ,,,: B. The moon would eventually crash
into Earth — Increased Earth mass increases gravitational pull .
Q9. What would happen to a planet's motion if the force of gravity between the
planet and its star was suddenly turned off?
• A. The planet would stop moving
• B. The planet would spiral away from the star
• C. The planet would move in a straight line
• D. The planet would spiral inward toward the star
,, Resolution Result Verified Answers ,,,: C. The planet would move in a
straight line — Without gravity, Newton's first law states objects continue in
straight-line motion .
Q10. A spacecraft encounters a cloud of gas particles. As the force of gravity pulls
these particles closer together, what happens to the density of the gas?
