Astro 7n Exam UPDATED ACTUAL Exam
Questions and CORRECT Answers
What two properties of a planet affect the gravity we feel on the 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 surface of the two planet? - 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 of the earth and the radius 1/2
the radius of the 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 on earth
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital
plane around its star world. - CORRECT ANSWER - Have seasons that are not different
from each other as compared to Earth's.
The Rotation Axis of the earth is - CORRECT ANSWER - tilted at about 23 degrees
relative to the axis of the Earth's Orbit around the sun
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? - CORRECT ANSWER - Summer on Uranus
When is the waning gibbous highest in the sky? - CORRECT ANSWER - 3 am
At what time will the Moon set on the day of a Solar eclipse? - CORRECT ANSWER -
Sunset
Stars that are in the constellation.. - CORRECT ANSWER - are likely to be at very
different distances from us
, " The north star" is in the constellation of Ursa Major, which lies the north pole of earth. Which
of the following is true? - CORRECT ANSWER - Ursa Major is not a zodiac constellation
A particular constellation is high in the sky at midnight in April. Where 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 million kelvin to be like? - CORRECT
ANSWER - Peak at X-Ray Wavelengths
Radio waves can travel large distances without interference because... - CORRECT
ANSWER - They have longer wavelengths than visible light
in the diagram above, what is happening in the box in the center? - CORRECT
ANSWER - Hydrogen gas is absorbing photons at specific wavelengths
What is a hot, dense gas surrounded 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 - 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
Questions and CORRECT Answers
What two properties of a planet affect the gravity we feel on the 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 surface of the two planet? - 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 of the earth and the radius 1/2
the radius of the 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 on earth
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital
plane around its star world. - CORRECT ANSWER - Have seasons that are not different
from each other as compared to Earth's.
The Rotation Axis of the earth is - CORRECT ANSWER - tilted at about 23 degrees
relative to the axis of the Earth's Orbit around the sun
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? - CORRECT ANSWER - Summer on Uranus
When is the waning gibbous highest in the sky? - CORRECT ANSWER - 3 am
At what time will the Moon set on the day of a Solar eclipse? - CORRECT ANSWER -
Sunset
Stars that are in the constellation.. - CORRECT ANSWER - are likely to be at very
different distances from us
, " The north star" is in the constellation of Ursa Major, which lies the north pole of earth. Which
of the following is true? - CORRECT ANSWER - Ursa Major is not a zodiac constellation
A particular constellation is high in the sky at midnight in April. Where 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 million kelvin to be like? - CORRECT
ANSWER - Peak at X-Ray Wavelengths
Radio waves can travel large distances without interference because... - CORRECT
ANSWER - They have longer wavelengths than visible light
in the diagram above, what is happening in the box in the center? - CORRECT
ANSWER - Hydrogen gas is absorbing photons at specific wavelengths
What is a hot, dense gas surrounded 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 - 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
