Ast 121|80 Exam set 3 Final Quiz Questions Perfectly Solved|2024
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Course
Ast 121
Institution
Ast 121
A gas cloud collapses because of - ️️self-gravity
A lack of craters means Pluto's surface is - ️️young
A low pressure region in Jupiter's southern hemisphere moves - ️️counter-clockwise
A problem to the encounter hypothesis is - ️️Stars are very far apart, and hot gasses expand
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Ast 121|80 Exam set 3 Final Quiz
Questions
A gas cloud collapses because of - ✔ ✔ self-gravity
A lack of craters means Pluto's surface is - ✔ ✔ young
A low pressure region in Jupiter's southern hemisphere moves - ✔ ✔ counter-clockwise
A problem to the encounter hypothesis is - ✔ ✔ Stars are very far apart, and hot gasses expand
A virus is - ✔ ✔ non-living in isolation
Ceres, the first asteroid to be discovered, lies between Mars and Jupiter. Why was Ceres unknown to
ancient astronomers? - ✔ ✔ It is too faint to be seen with the unaided eye
Comets are - ✔ ✔ fossil relics of early SS, icy planetesimals, thrown into the Oort cloud, rich in CNO
compounds
Convective flow is - ✔ ✔ the motion of bubbles of high and low density gas
Direct imaging to find exoplanets is best done from space because - ✔ ✔ there is no atmosphere
Doppler shifts due to planets around other stars are on order of - ✔ ✔ 10's of km/sec
Eucaryote cells are - ✔ ✔ any cell that possesses a clearly defined nucleus
Evolution concerns - ✔ ✔ populations
Evolution is to biology as Newtonian mechanics is to - ✔ ✔ Physics
Gas giants grow very large in mass because - ✔ ✔ there is more ice and gas in the outer SS
Hot Jupiters were a surprise because - ✔ ✔ Jovian worlds are usually in the outer SS
How does the Appearance of the rings of Uranus compare with the appearance of the rings of Saturn? -
✔ ✔ Uranus are thin, Saturn are broad
How does the greenhouse effect change the habitable zone? - ✔ ✔ it moves it inward
How many of those planets will have life - ✔ ✔ can not determine from info given
How much energy from the sun strikes the Earth in one minute? - ✔ ✔ 1.1 x 10^26 ergs
, how much energy is produced in the conversion of four protons into one He nuclei? - ✔ ✔ 4.3 x 10^-
5 ergs
If Neptune were hollow, it could contain - ✔ ✔ 60 earths
If the sun puts out 3.99 x 10^33 ergs/sec, how many neutrinos are emitted per sec? - ✔ ✔ 9.35 x
10^37
If the Sun were fainter, the habitable zone would - ✔ ✔ be closer to the Sun
If there are 100 stars within 50 light years of the Sun, and there are about Earth-like planets around 1 in
5 stars in the galaxy, how many likely Earth's are there within 50 light years? - ✔ ✔ 20
Jupiter is too warm based on the amount of solar energy it absorbs by about - ✔ ✔ 20 degrees
Kirkwood gaps are caused by - ✔ ✔ gravity of jupiter
Kuiper Belt objects are discovered - ✔ ✔ optical telescopes
Magnetic Fields of Uranus and Neptune are - ✔ ✔ local events in the icy mantles
Moons, for TNO's are - ✔ ✔ common
Most asteroids are located in the asteroid belt that lies between 2.1 and 3.3 AU from the sun. What
orbital periods correspond to the inside and outside of the asteroid belt? - ✔ ✔ 3 and 6 years
Most meteors are stopped by the atmosphere at heights of - ✔ ✔ 10 to 100km
Most of the energy emitted by the sun comes out in the - ✔ ✔ IR
Neptune is 50% farther away from the Sun than Uranus is, yet their atmospheric temperatures are
nearly the same. Why? - ✔ ✔ the atmosphere of Uranus is warmed only by sunlight while that of
Neptune is also warmed by internal energy flowing outward through it.
Never look directly at the Sun because - ✔ ✔ it emits UV radiation that can burn your retina
Over time Jupiter and Saturn orbits - ✔ ✔ decreased for Jupiter, increased for Saturn
Pluto and Neptune can never collide because - ✔ ✔ Pluto's orbit is tilted
Pluto has a temperature of about 50K. Use Wien's law to calculate the wavelength at which Pluto is
brightest - ✔ ✔ 6 x 10^-5 m
Puck is - ✔ ✔ a moon of Uranus
Saturn is more Oblate than Jupiter, which means - ✔ ✔ It has a larger mantle and smaller core
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