Astro 7n PSU Exam 1 Review Questions &
Right Answers 2024/25
What two properties of a planet affect the gravity we feel on its surface?
A: radius and distance from the Sun
B: radius and temperature
C: mass and distance from the Sun
D: mass and radius
E: mass and temperature - CORRECT ANSWER D
Two planets have the same radius. If Planet A is 5 times more massive than Planet B, how does gravity
differ on the surfaces of the two planets?
A: gravity is 5 times stronger on Planet B
B: gravity is 5 times stronger on Planet A
C: gravity is 25 times stronger on Planet A
D: gravity is 25 times stronger on Planet B
E: gravity is equal on Planet A and Planet B - CORRECT ANSWER B
Say that there were a planet X in our Solar System with a mass 1/4 the mass of Earth and a radius 1/2 the
radius of Earth. How will the gravity on its surface compare to the surface gravity of Earth?
A: surface gravity on planet X is 2 times weaker than on Earth
B: surface gravity on planet X is 2 times stronger than on Earth
C: surface gravity on planet X is the same as on Earth
D: surface gravity on planet X is 8 times stronger than on Earth
E: surface gravity on planet X is 4 times weaker than on Earth - CORRECT ANSWER C
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane
around its star would ...
A: have longer days and nights than those of Earth
,B: have very severe seasons compared to Earth
C: have shorter years than those of Earth
D: have shorter days and nights than those of Earth
E: have seasons that are not very different from each other as compared to Earth's. - CORRECT ANSWER
E
5. The rotation axis of the Earth is ... A: tilted so that it is always pointed directly at the Sun
B: is sometimes parallel and sometimes perpendicular to the axis of the Earth's orbit around the Sun. C:
tilted at about 23 degrees relative to the axis of the Earth's orbit around the Sun.
D: perpendicular to the axis of the Earth's orbit around the Sun.
E: parallel to the axis of the Earth's orbit around the Sun. - CORRECT ANSWER C
In the diagram above, what season and planet is being represented by the red X on the planet on the left
in orbit around the Sun?
A: winter on Earth
B: summer on Earth
C: winter on Venus
D: winter on Uranus
E: summer on Uranus - CORRECT ANSWER E
When is the waning gibbous moon highest in the sky?
A: about 9:00am
B: about 3:00am
C: about noon
D: about midnight
E: about 3:00pm - CORRECT ANSWER B
What phase is the Moon in, when observed by the person standing on the Earth in the diagram above?
A: New
B: Third Quarter
, C: Waning Gibbous
D: Full
E: First Quarter - CORRECT ANSWER B
At what time will the Moon set on the day of a Solar eclipse?
A: Sunrise.
B: Noon.
C: Sunset.
D: Midnight.
E: It will not set at all. It will be up for 24 hours. - CORRECT ANSWER C
Stars that are in the same constellation ...
A: appear in all different directions around the sky.
B: are all at close to the same distance from us.
C: are likely to be at very different distances from us.
D: are all in our Solar System.
E: are all in orbit around the same larger star. - CORRECT ANSWER C
The "North Star" is a star in the constellation of Ursa Minor, which lies just above the North pole of
Earth. Which of the following is true? A: Ursa Minor is a Zodiac constellation in the winter but not in the
summer.
B: Ursa Minor is a Zodiac constellation in the summer but not in the winter.
C: Ursa Minor is not a Zodiac constellation.
D: The Zodiac constellations are located near the axis below the South pole.
E: Ursa Minor is a Zodiac constellation all year. - CORRECT ANSWER C
A particular Zodiac constellation is high in the sky at midnight in April. Where will it be in October?
A: high in the sky at midnight
B: near the Sun in the daytime sky
Right Answers 2024/25
What two properties of a planet affect the gravity we feel on its surface?
A: radius and distance from the Sun
B: radius and temperature
C: mass and distance from the Sun
D: mass and radius
E: mass and temperature - CORRECT ANSWER D
Two planets have the same radius. If Planet A is 5 times more massive than Planet B, how does gravity
differ on the surfaces of the two planets?
A: gravity is 5 times stronger on Planet B
B: gravity is 5 times stronger on Planet A
C: gravity is 25 times stronger on Planet A
D: gravity is 25 times stronger on Planet B
E: gravity is equal on Planet A and Planet B - CORRECT ANSWER B
Say that there were a planet X in our Solar System with a mass 1/4 the mass of Earth and a radius 1/2 the
radius of Earth. How will the gravity on its surface compare to the surface gravity of Earth?
A: surface gravity on planet X is 2 times weaker than on Earth
B: surface gravity on planet X is 2 times stronger than on Earth
C: surface gravity on planet X is the same as on Earth
D: surface gravity on planet X is 8 times stronger than on Earth
E: surface gravity on planet X is 4 times weaker than on Earth - CORRECT ANSWER C
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane
around its star would ...
A: have longer days and nights than those of Earth
,B: have very severe seasons compared to Earth
C: have shorter years than those of Earth
D: have shorter days and nights than those of Earth
E: have seasons that are not very different from each other as compared to Earth's. - CORRECT ANSWER
E
5. The rotation axis of the Earth is ... A: tilted so that it is always pointed directly at the Sun
B: is sometimes parallel and sometimes perpendicular to the axis of the Earth's orbit around the Sun. C:
tilted at about 23 degrees relative to the axis of the Earth's orbit around the Sun.
D: perpendicular to the axis of the Earth's orbit around the Sun.
E: parallel to the axis of the Earth's orbit around the Sun. - CORRECT ANSWER C
In the diagram above, what season and planet is being represented by the red X on the planet on the left
in orbit around the Sun?
A: winter on Earth
B: summer on Earth
C: winter on Venus
D: winter on Uranus
E: summer on Uranus - CORRECT ANSWER E
When is the waning gibbous moon highest in the sky?
A: about 9:00am
B: about 3:00am
C: about noon
D: about midnight
E: about 3:00pm - CORRECT ANSWER B
What phase is the Moon in, when observed by the person standing on the Earth in the diagram above?
A: New
B: Third Quarter
, C: Waning Gibbous
D: Full
E: First Quarter - CORRECT ANSWER B
At what time will the Moon set on the day of a Solar eclipse?
A: Sunrise.
B: Noon.
C: Sunset.
D: Midnight.
E: It will not set at all. It will be up for 24 hours. - CORRECT ANSWER C
Stars that are in the same constellation ...
A: appear in all different directions around the sky.
B: are all at close to the same distance from us.
C: are likely to be at very different distances from us.
D: are all in our Solar System.
E: are all in orbit around the same larger star. - CORRECT ANSWER C
The "North Star" is a star in the constellation of Ursa Minor, which lies just above the North pole of
Earth. Which of the following is true? A: Ursa Minor is a Zodiac constellation in the winter but not in the
summer.
B: Ursa Minor is a Zodiac constellation in the summer but not in the winter.
C: Ursa Minor is not a Zodiac constellation.
D: The Zodiac constellations are located near the axis below the South pole.
E: Ursa Minor is a Zodiac constellation all year. - CORRECT ANSWER C
A particular Zodiac constellation is high in the sky at midnight in April. Where will it be in October?
A: high in the sky at midnight
B: near the Sun in the daytime sky
