ASTRO 7N PSU EXAM 1
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📋 DOCUMENT OVERVIEW 65 Qs
The "Astro 7N PSU Exam 1" document covers various topics in astronomy, specifically Newton's laws of
motion, gravity, planetary movements, and celestial bodies such as the Sun, Jupiter, Triton, and Pluto.
Each question is provided with a correct answer and a detailed explanation, accompanied by diagrams
and images to aid understanding. This comprehensive resource enables students to study, review, and
solidify their grasp of key astronomical concepts, facilitating exam preparation and a deeper
understanding of the subject.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
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EXAM QUESTIONS
QUESTION 1
Newton's 1st Law
CORRECT ANSWER
An object at rest stays at rest unless acted upon by a force
RATIONALE: Newton's 1st Law is correct because it describes the concept of inertia, which is the inherent property of
an object to resist changes in its motion. This law accurately captures the idea that an object will maintain its state of
motion, whether at rest or in motion, unless an external force is applied to it, disrupting its inertia.
QUESTION 2
Newton's 2nd Law
CORRECT ANSWER
F=ma
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, RATIONALE: Newton's 2nd Law is a statement of the relationship between an object's mass, acceleration, and the net
force acting upon it, and F=ma is the mathematical expression that directly represents this fundamental concept. This
equation demonstrates that the more massive an object is, the more force is required to achieve a given acceleration,
and that a greater force is needed to accelerate an object with a higher mass at the same rate as a less massive object.
QUESTION 3
Newton's 3rd Law
CORRECT ANSWER
For every action, there is an equal and opposite reaction
RATIONALE: Newton's 3rd Law is correct because it describes the fundamental principle that when an object exerts
force on another object, it simultaneously experiences an equal and opposite force from that object, illustrating a
symmetrical relationship between cause and effect. This law is a direct consequence of the conservation of momentum,
where the total momentum before and after an interaction remains constant, and it applies universally to all interactions
at a microscopic and macroscopic level.
QUESTION 4
Strength of Gravity
CORRECT ANSWER
g=M/(R^2)
RATIONALE: The strength of gravity is determined by the mass of the objects involved, which is represented by 'M' in
the equation, and the inverse square of the distance between them, signified by 'R^2', indicating that gravity weakens
rapidly with distance. This equation, 'g=M/(R^2)', accurately reflects the inverse square law of gravity, a fundamental
principle in physics that describes how gravitational force decreases with increasing distance.
QUESTION 5
Force of Gravity
CORRECT ANSWER
F=(M1M2/(D^2))
RATIONALE: The formula "F = (M1M2/(D^2))" accurately represents the force of gravity because it reflects Newton's
law of universal gravitation, which describes how the gravitational force between two objects is directly proportional to
their masses and inversely proportional to the square of the distance between them. This relationship is a fundamental
concept in physics that helps predict the gravitational forces acting between objects in the universe.
QUESTION 6
Sun's Movement
CORRECT ANSWER
East to West
Due to Earth's rotation
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, RATIONALE: The Earth's rotation from west to east causes the sun's apparent movement from east to west, creating
the illusion that the sun is moving across the sky. This effect is an example of a relative motion, where the Earth's
rotation provides the reference frame, making the sun appear to be moving in the opposite direction.
QUESTION 7
Phase Order of the Moon
CORRECT ANSWER
New --> Waxing Crescent --> First Quarter --> Waking Gibbous --> Full --> Waning Gibbous --> Third
Quarter --> Waning Crescent --> New
RATIONALE: The sequence of the Moon's phases is determined by the amount of illuminated surface area visible from
Earth as the Moon orbits the Sun, with each phase marking a significant increase or decrease in this visible illumination.
This gradual increase and decrease in visible illumination results in a predictable progression from the New Moon, where
no light is visible, to the Full Moon, and then back to the New Moon again, completing the lunar cycle.
QUESTION 8
Full Moon
CORRECT ANSWER
Sun--Earth--Moon
RATIONALE: The term "Full Moon" describes a specific lunar phase that occurs when the Moon is positioned on the
opposite side of the Earth from the Sun, aligning the three celestial bodies in a straight line. This alignment causes the
entire face of the Moon to be illuminated by the Sun's light, resulting in the characteristic bright, fully visible appearance
known as a Full Moon.
QUESTION 9
New Moon
CORRECT ANSWER
Sun--Moon--Earth
RATIONALE: The term "New Moon" refers to the phase of the Moon when it is positioned between the Earth and the
Sun, making it invisible from our planet as the Sun's light overpowers it. This alignment is precisely what is described by
the sequence "Sun--Moon--Earth", highlighting the correct positioning of celestial bodies during a New Moon.
QUESTION 10
Constellation
CORRECT ANSWER
Large defined area in the sky
There are 88
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65+ (2026 Edition) 100% Correct Questions & Answers | Verified
Solutions | Full Exam Bank
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 65 Qs
The "Astro 7N PSU Exam 1" document covers various topics in astronomy, specifically Newton's laws of
motion, gravity, planetary movements, and celestial bodies such as the Sun, Jupiter, Triton, and Pluto.
Each question is provided with a correct answer and a detailed explanation, accompanied by diagrams
and images to aid understanding. This comprehensive resource enables students to study, review, and
solidify their grasp of key astronomical concepts, facilitating exam preparation and a deeper
understanding of the subject.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
Newton's 1st Law
CORRECT ANSWER
An object at rest stays at rest unless acted upon by a force
RATIONALE: Newton's 1st Law is correct because it describes the concept of inertia, which is the inherent property of
an object to resist changes in its motion. This law accurately captures the idea that an object will maintain its state of
motion, whether at rest or in motion, unless an external force is applied to it, disrupting its inertia.
QUESTION 2
Newton's 2nd Law
CORRECT ANSWER
F=ma
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, RATIONALE: Newton's 2nd Law is a statement of the relationship between an object's mass, acceleration, and the net
force acting upon it, and F=ma is the mathematical expression that directly represents this fundamental concept. This
equation demonstrates that the more massive an object is, the more force is required to achieve a given acceleration,
and that a greater force is needed to accelerate an object with a higher mass at the same rate as a less massive object.
QUESTION 3
Newton's 3rd Law
CORRECT ANSWER
For every action, there is an equal and opposite reaction
RATIONALE: Newton's 3rd Law is correct because it describes the fundamental principle that when an object exerts
force on another object, it simultaneously experiences an equal and opposite force from that object, illustrating a
symmetrical relationship between cause and effect. This law is a direct consequence of the conservation of momentum,
where the total momentum before and after an interaction remains constant, and it applies universally to all interactions
at a microscopic and macroscopic level.
QUESTION 4
Strength of Gravity
CORRECT ANSWER
g=M/(R^2)
RATIONALE: The strength of gravity is determined by the mass of the objects involved, which is represented by 'M' in
the equation, and the inverse square of the distance between them, signified by 'R^2', indicating that gravity weakens
rapidly with distance. This equation, 'g=M/(R^2)', accurately reflects the inverse square law of gravity, a fundamental
principle in physics that describes how gravitational force decreases with increasing distance.
QUESTION 5
Force of Gravity
CORRECT ANSWER
F=(M1M2/(D^2))
RATIONALE: The formula "F = (M1M2/(D^2))" accurately represents the force of gravity because it reflects Newton's
law of universal gravitation, which describes how the gravitational force between two objects is directly proportional to
their masses and inversely proportional to the square of the distance between them. This relationship is a fundamental
concept in physics that helps predict the gravitational forces acting between objects in the universe.
QUESTION 6
Sun's Movement
CORRECT ANSWER
East to West
Due to Earth's rotation
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, RATIONALE: The Earth's rotation from west to east causes the sun's apparent movement from east to west, creating
the illusion that the sun is moving across the sky. This effect is an example of a relative motion, where the Earth's
rotation provides the reference frame, making the sun appear to be moving in the opposite direction.
QUESTION 7
Phase Order of the Moon
CORRECT ANSWER
New --> Waxing Crescent --> First Quarter --> Waking Gibbous --> Full --> Waning Gibbous --> Third
Quarter --> Waning Crescent --> New
RATIONALE: The sequence of the Moon's phases is determined by the amount of illuminated surface area visible from
Earth as the Moon orbits the Sun, with each phase marking a significant increase or decrease in this visible illumination.
This gradual increase and decrease in visible illumination results in a predictable progression from the New Moon, where
no light is visible, to the Full Moon, and then back to the New Moon again, completing the lunar cycle.
QUESTION 8
Full Moon
CORRECT ANSWER
Sun--Earth--Moon
RATIONALE: The term "Full Moon" describes a specific lunar phase that occurs when the Moon is positioned on the
opposite side of the Earth from the Sun, aligning the three celestial bodies in a straight line. This alignment causes the
entire face of the Moon to be illuminated by the Sun's light, resulting in the characteristic bright, fully visible appearance
known as a Full Moon.
QUESTION 9
New Moon
CORRECT ANSWER
Sun--Moon--Earth
RATIONALE: The term "New Moon" refers to the phase of the Moon when it is positioned between the Earth and the
Sun, making it invisible from our planet as the Sun's light overpowers it. This alignment is precisely what is described by
the sequence "Sun--Moon--Earth", highlighting the correct positioning of celestial bodies during a New Moon.
QUESTION 10
Constellation
CORRECT ANSWER
Large defined area in the sky
There are 88
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