PSU Astro 7N Exam 1; Questions with Complete
Solutions 100% Verified
What two properties of a planet affect the gravity we feel on its surface? Correct answerMass and radius
Two planets have the same radius. If Planet A is 5 times more mass than Planet B, how does
gravity differ on the surf...
PSU Astro 7N Exam 1; Questions with Complete
Solutions 100% Verified
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 mass 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 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 would ... Correct answer-Have seasons that are not very different
from each other as compared to Earth
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-
When is the waning gibbous moon highest in the sky? Correct answer-About 3 am
, PSU Astro 7N Exam 1; Questions with Complete
Solutions 100% Verified
What phase is the Moon in, when observed by the person standing on the Earth in the diagram
above? Correct answer-New
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 a Zodiac
constellation in the summer but not in the winter
A particular Zodiac 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 1,000,000 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,
higher 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-
A star 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-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 a telescope
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