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PSU Astro 7N Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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PSU Astro 7N Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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PSU Astro 7N Exam 1 | Questions And Answers Latest {2024- 2025} A+Graded | 100% Verified
What two properties of a planet affect the gravity we feel on its surface? - 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? - 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? - 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 ... - Have seasons that are not very different from each other as compared to Earth
The rotation axis of the Earth is ... - 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? -
When is the waning gibbous moon highest in the sky? - About 3 am
What phase is the Moon in, when observed by the person standing on the Earth in the diagram above? -
New
At what time will the Moon set on the day of a Solar eclipse? - Sunset
Stars that are in the same constellation ... - 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? - 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? -
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? - It should peak at X-
ray wavelengths
As compared to a cool star, a hotter star emits ... - Shorter wavelength, higher frequency, bluer color
Radio waves can travel large distances without interference because ... - They have longer wavelengths
than visible light
Compared to ultraviolet radiation, X-rays have a wavelength that is ... - Shorter
Star A is 4000 K, and Star B is 8000 K. Which of the following is true? - The color of Star A is redder than
Star B
In the diagram above, what is happening in the box in the center? -
A star is a hot, dense gas surrounded by a cooler, low density atmosphere. What type of spectrum will a
star create? - Absorption Spectrum
What makes a transition from a lower energy state to a higher energy state when a photon is absorbed
into an atom? - Electron
An emission line is produced when: - An electron passes from a higher to a lower energy level
Bright lines in an emission spectrum represent: - 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 ... - Diameter of the
opening of a telescope
In what ways does a 5 meter telescope outperform a 1 meter telescope?I - its images are 25 times
brighter than a 1 meter
A mountain top is a good location for optical telescopes because the site ... - Is above much of the
atmosphere
Which statement about the rotation of the Inner planets is true? - Venus rotates in the opposite
direction from the three other inner planets
Which of the following is TRUE? - Mercury rotates exactly one and a half times for every one revolution
around the Sun.
Why do the orbits of the planets all lie in nearly the same plane? - The early solar nebula flattened into a
disk.
Of these choices, which planet has the most moons? - Saturn has more than Earth, Mercury, Mars, and
Venus
Venus is visible to us ... - 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^2
= a^3 to calculate the period of the orbit, in years. - 11.2 years
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? - increase P and shift the curve
How do most craters on moons form? - impact of asteroids
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