ASTRO 7N EXAM QUESTIONS AND ANSWERS 2025-26 #2
What two properties of a planet affect the gravity we feel on its surface - correct answer
mass and radius
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 - correct answer gravity is 5
times stronger on planet a
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 - correct answer surface gravity on planet x is the same as earth
A planet in a nearly circular orbit w its rotation axis tilted by 5 degrees relative to its
orbital plane around its star would - correct answer have seasons that are not very
different from each other as compared to earths
The rotation of the earth is - correct answer tilted at about 23 degrees relative to the
axis of the earths orbit around the sun
In the diagram above, what season and plant is being represented by the red x on the
planet on the left in orbit around the sun - correct answer summer on uranus
When is the waning gibbuous moon highest in the sky - correct answer ab 3:00am
What phase is the moon in, when observed by the person standing on the earth in the
diagram above - correct answer third quarter
At what time will the moon set on the day of a solar eclipse - correct answer sunset
Stars that are in the same constellation - correct answer are likely to be at very different
distances from us
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 - correct answer ursa minor is not a
zodiac constellation
A particular zodiac is high in the sky at midnight in april. Wheres will it be in october -
correct answer near the sun in the daytime sky
What do you expect the spectrum of an object that is 1,000,000 kelvin to be like? -
correct answer it should peak at x-ray wavelengths
As compared to a cool star, a hotter star emits - correct answer shorter wavelength,
high frequency, bluer color
,Radio waves can travel large distances without interference because - correct answer
they have longer wavelengths than visible light
Compared to ultraviolet radiation, x-rays have a wavelength that is - correct answer
shorter
Star a is 4000 k, and star b is 8000 k. Which of the following is true - correct answer the
color of star a is redder than star b
In the diagram above, what is happening in the box in the center - correct answer
hydrogen gas is absorbing photons at specific wavelengths
A star is a hot, dense gas surronded by a cooler, low density atmosphere. What type of
spectrum will a star create - correct answer absorption spectrum
What makes a transition from a lower energy state to a higher energy state when a
photon is absorbed into an atom - correct answer electron
An emission line is produced when - correct answer an electron passes from a higher to
a lower energy level
Bright lines in an emission spectrum represent - correct answer particular energies of
light that are emitted from a distant object
The faintness of an object that a telescope can observe is mostly determined by the -
correct answer diameter of the opening of the telescope
In what ways does a 5 meter telescope outperform a 1 meter telescope - correct answer
its images are 25 times brighter than 1 meter
A mountain top is a good location for optical telescopes because they site - correct
answer is above much of the atmosphere
Which statement ab the rotation of the inner planets is true - correct answer venus
rotates in the opposite direction from the three others
Which of the following is true - correct answer mercury rotates exactly one and a half
times for every one revolution around the sun
What do the orbits of the planets all lie in nearly the same plane - correct answer early
solar nebula flattened into a disk
Of these choices, which planet has the most moons - correct answer saturn
Venus is visible to us - correct answer only near sunrise or sunset
, A planet is in orbit around the sun. The semimajor axis of the orbit is 5 astronomical
units (au)
Use p sqaured= a cubed
To calculate the period of the orbit, in years - correct answer 11. 2
In the above diagram, how should the parameters of the white curve be changed in
order that it matches the observed distance versus time graph of callisto - correct
answer increase p and shift the curve
How do most craters on moons form - correct answer impact of asteriods
Which planet has a temp of 800 degrees f on the side facing the sun and -290 degrees f
on the side opposite of the sun - correct answer mercury
How many earth years does it take uranus to orbit the sun - correct answer 84
Meteors are - correct answer asteriods or comet debris that pass into earths
atmosphere and burn up
Which feature of neptune is most responsible for its blue color - correct answer methane
in its atmosphere
Which of the following statements is true - correct answer planet saturn has more than
30 moons
The surface of venus is hotter than the surface of mercury because - correct answer
venus is more massive and is able to retain a thick atmosphere
Which of the following is moving fastest in the orbit - correct answer venus at its
periheilon (closest point to the sun)
Which of the following is false - correct answer saturn has a density of 4.8 grams per
cubic centimeter, similar to metals like aluminum and iron
Which of the following objects have a dark/black sky, even in the daytime - correct
answer both the moon and mercury
Which of the following is the largest distance - correct answer distance from jupiter to
saturn
Where on the venn diagram, above, does the clue "tail always points away from the
sun" belong - correct answer comets
What two properties of a planet affect the gravity we feel on its surface - correct answer
mass and radius
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 - correct answer gravity is 5
times stronger on planet a
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 - correct answer surface gravity on planet x is the same as earth
A planet in a nearly circular orbit w its rotation axis tilted by 5 degrees relative to its
orbital plane around its star would - correct answer have seasons that are not very
different from each other as compared to earths
The rotation of the earth is - correct answer tilted at about 23 degrees relative to the
axis of the earths orbit around the sun
In the diagram above, what season and plant is being represented by the red x on the
planet on the left in orbit around the sun - correct answer summer on uranus
When is the waning gibbuous moon highest in the sky - correct answer ab 3:00am
What phase is the moon in, when observed by the person standing on the earth in the
diagram above - correct answer third quarter
At what time will the moon set on the day of a solar eclipse - correct answer sunset
Stars that are in the same constellation - correct answer are likely to be at very different
distances from us
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 - correct answer ursa minor is not a
zodiac constellation
A particular zodiac is high in the sky at midnight in april. Wheres will it be in october -
correct answer near the sun in the daytime sky
What do you expect the spectrum of an object that is 1,000,000 kelvin to be like? -
correct answer it should peak at x-ray wavelengths
As compared to a cool star, a hotter star emits - correct answer shorter wavelength,
high frequency, bluer color
,Radio waves can travel large distances without interference because - correct answer
they have longer wavelengths than visible light
Compared to ultraviolet radiation, x-rays have a wavelength that is - correct answer
shorter
Star a is 4000 k, and star b is 8000 k. Which of the following is true - correct answer the
color of star a is redder than star b
In the diagram above, what is happening in the box in the center - correct answer
hydrogen gas is absorbing photons at specific wavelengths
A star is a hot, dense gas surronded by a cooler, low density atmosphere. What type of
spectrum will a star create - correct answer absorption spectrum
What makes a transition from a lower energy state to a higher energy state when a
photon is absorbed into an atom - correct answer electron
An emission line is produced when - correct answer an electron passes from a higher to
a lower energy level
Bright lines in an emission spectrum represent - correct answer particular energies of
light that are emitted from a distant object
The faintness of an object that a telescope can observe is mostly determined by the -
correct answer diameter of the opening of the telescope
In what ways does a 5 meter telescope outperform a 1 meter telescope - correct answer
its images are 25 times brighter than 1 meter
A mountain top is a good location for optical telescopes because they site - correct
answer is above much of the atmosphere
Which statement ab the rotation of the inner planets is true - correct answer venus
rotates in the opposite direction from the three others
Which of the following is true - correct answer mercury rotates exactly one and a half
times for every one revolution around the sun
What do the orbits of the planets all lie in nearly the same plane - correct answer early
solar nebula flattened into a disk
Of these choices, which planet has the most moons - correct answer saturn
Venus is visible to us - correct answer only near sunrise or sunset
, A planet is in orbit around the sun. The semimajor axis of the orbit is 5 astronomical
units (au)
Use p sqaured= a cubed
To calculate the period of the orbit, in years - correct answer 11. 2
In the above diagram, how should the parameters of the white curve be changed in
order that it matches the observed distance versus time graph of callisto - correct
answer increase p and shift the curve
How do most craters on moons form - correct answer impact of asteriods
Which planet has a temp of 800 degrees f on the side facing the sun and -290 degrees f
on the side opposite of the sun - correct answer mercury
How many earth years does it take uranus to orbit the sun - correct answer 84
Meteors are - correct answer asteriods or comet debris that pass into earths
atmosphere and burn up
Which feature of neptune is most responsible for its blue color - correct answer methane
in its atmosphere
Which of the following statements is true - correct answer planet saturn has more than
30 moons
The surface of venus is hotter than the surface of mercury because - correct answer
venus is more massive and is able to retain a thick atmosphere
Which of the following is moving fastest in the orbit - correct answer venus at its
periheilon (closest point to the sun)
Which of the following is false - correct answer saturn has a density of 4.8 grams per
cubic centimeter, similar to metals like aluminum and iron
Which of the following objects have a dark/black sky, even in the daytime - correct
answer both the moon and mercury
Which of the following is the largest distance - correct answer distance from jupiter to
saturn
Where on the venn diagram, above, does the clue "tail always points away from the
sun" belong - correct answer comets
