UO Astronomy 121|49 Test 1 Final Exam Questions |Containing Answers|17 Pages
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Course
UO Astronomy 121
Institution
UO Astronomy 121
A rock suddenly moving without any external forces (earthquakes, someone throwing it, poltergeists, etc) would be a violation of which law?
a. Kepler's 3rd law
b. Kepler's 2nd law
c. Newton's 2nd law
d. Kepler's 1st law
e. Newton's 1st law
f. Newton's 3rd law - ️️e. Newton's 1st law
Ac...
A rock suddenly moving without any external forces (earthquakes, someone throwing it, poltergeists,
etc) would be a violation of which law?
a. Kepler's 3rd law
b. Kepler's 2nd law
c. Newton's 2nd law
d. Kepler's 1st law
e. Newton's 1st law
f. Newton's 3rd law - ✔ ✔ e. Newton's 1st law
According to chapter 3, if the Earth suddenly collapsed and shrank to half its size then... (multiple)
a. The spin would decrease
b. it would turn into a black hole
c. The density would increase
d. The density would decrease
e. cannot tell from information given
f. The spin would increase - ✔ ✔ c. The density would increase
&
f. The spin would increase
According to Kepler's third law, there is a relationship between the time a planet takes to revolve
around the Sun and its
a. distance from the Sun
,b. period of rotation
c. eccentricity
d. astrological sign
e. size - ✔ ✔ a. distance from the Sun
Approximately how long does it take for a comet to orbit the Sun with an average distance of 50AU to
the Sun?
a. 338 years
b. 354 years
c. 14 years
d. 550 years
e. 53 years - ✔ ✔ b. 354 years
Aristarchus' sun-centered model was rejected over specific reasons. Which of the following are valid and
relevant scientific observations as to why the Earth cannot move according to his critics as opposed to
observations based on belief and cultural bias or reasons that irrelevant and wouldn't indicate a
heliocentric or geocentric Universe? (multiple)
a. If the Earth were moving then the Earth wouldn't be round but we know it is round.
b. The Earth cannot be part of the heavens as it is corrupt.
c. If Earth were moving, we would see nearby stars move relative to more distant stars but we don't
d. If Earth were moving we would feel some general motion in one direction but we don't
e. If Earth were moving, we wouldn't be at the center of the universe and we know we are. - ✔ ✔ c.
If Earth were moving, we would see nearby stars move relative to more distant stars but we don't
&
d. If Earth were moving we would feel some general motion in one direction but we don't
Based on Kepler's laws, which statement is 100% true?
, a. None of the listed answers (except this one) is true.
b. Jupiter sometimes moves faster than Mars in it's orbit
c. If a comet has an average distance of 100AU from the sun, we can conclude that it will take about 100
years to go around the Sun.
d. Saturn's year is 29 times longer than an Earth year. Thus the orbital path physical length
(circumference) is 29 times bigger than e. Earth's orbital path length
f. Halley's comet (75 year orbit, perihelion = 0.6AU, aphelion = 35AU) will occasionally move faster than
Venus in it's orbit. - ✔ ✔ f. Halley's comet (75 year orbit, perihelion = 0.6AU, aphelion = 35AU) will
occasionally move faster than Venus in it's orbit.
During what phase of the Moon is the Moon up only during the night hours and all night long
a. full moon
b. new moon
c. waxing crescent
d. waning crescent
e. first quarter
f. 3rd quarter - ✔ ✔ a. full moon
From a particular location on Earth, why can we see many more total eclipses of the Moon than total
eclipses of the Sun?
a. the line-up of the Earth, Moon, and Sun needed for a lunar eclipse happens many, many times more
often than the line-up needed for a solar eclipse
b. the Moon is much bigger in the sky than the Sun
c. the Moon is always in the same place in our sky, while the Sun moves around the sky d. a total lunar
eclipse is visible over a much larger part of the Earth's surface than a total solar eclipse
d, we always see exactly the same number of total lunar and total solar eclipses from any one location
on Earth
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