GEOL 109 Exam Questions with Revised Answers|
Verified 100% Correct
Which of the following is involved in collisional accretion? - ✔✔The aggregation of
planetismals when they impact one another.
Which of the following are true about planetary accretion? (Select all that apply.) -
✔✔As these particles accreted, the planets became hot as kinetic energy was
converted to thermal energy.
The planets grew larger and larger via repeated impact.
The planets became internally differentiated to different degrees.
The particles that accreted to form the planets were in orbit around the Sun.
When did the planets form? - ✔✔The planets formed about the same time as the Sun
in a relatively short period of time only a few million years long.
Which of these is evidence for planetary accretion? - ✔✔The heavily cratered
surfaces of the Moon and other planetary bodies.
How did the giant outer planets obtain their thick atmospheres? - ✔✔By collapse of
nebular gas onto a protoplanet's icy core.
Large planetary bodies failed to accrete in some parts of the solar system and did not
sweep their neighborhoods clear of debris. Select the two most prominent zones of this
"debris." - ✔✔between Mars and Jupiter
beyond Neptune
, Which of the following are characteristics of the orbits of the objects that accrete to
make planets? (Select all that apply.) - ✔✔Their orbits form a flattened disk shape.
They orbit in the equatorial plane (ecliptic) of the star.
The spin axes of some planets are tilted relative to the plane in which most orbit. What
could have caused this? - ✔✔The impact of a large object late in the history of
accretion changed the spin.
Think about the process of planetary accretion. Which statement best describes our
current ideas about the rate of impact cratering in the inner solar system? (has four
graphs) - ✔✔Initially, the rate declined smoothly, but there was a later episode of
heavy bombardment followed by resumption of the decline.
Which of the following best describes the orbital evolution of the planets in our solar
system according to the Nice Model? - ✔✔The orbits of the outer planets changed
significantly about 3.9 billion years ago as Uranus and Neptune moved outward from
the Sun.
Which is true about our current understanding of extrasolar planets (exoplanets)? -
✔✔Exoplanets are common and found around many different types of stars.
In general, large planets cool - ✔✔more slowly than small planets of similar
compositions
Important sources of planetary heat include all of the following except - ✔✔the Big
Bang
Which of the following is not a mechanism of heat transport? - ✔✔magnetism
Verified 100% Correct
Which of the following is involved in collisional accretion? - ✔✔The aggregation of
planetismals when they impact one another.
Which of the following are true about planetary accretion? (Select all that apply.) -
✔✔As these particles accreted, the planets became hot as kinetic energy was
converted to thermal energy.
The planets grew larger and larger via repeated impact.
The planets became internally differentiated to different degrees.
The particles that accreted to form the planets were in orbit around the Sun.
When did the planets form? - ✔✔The planets formed about the same time as the Sun
in a relatively short period of time only a few million years long.
Which of these is evidence for planetary accretion? - ✔✔The heavily cratered
surfaces of the Moon and other planetary bodies.
How did the giant outer planets obtain their thick atmospheres? - ✔✔By collapse of
nebular gas onto a protoplanet's icy core.
Large planetary bodies failed to accrete in some parts of the solar system and did not
sweep their neighborhoods clear of debris. Select the two most prominent zones of this
"debris." - ✔✔between Mars and Jupiter
beyond Neptune
, Which of the following are characteristics of the orbits of the objects that accrete to
make planets? (Select all that apply.) - ✔✔Their orbits form a flattened disk shape.
They orbit in the equatorial plane (ecliptic) of the star.
The spin axes of some planets are tilted relative to the plane in which most orbit. What
could have caused this? - ✔✔The impact of a large object late in the history of
accretion changed the spin.
Think about the process of planetary accretion. Which statement best describes our
current ideas about the rate of impact cratering in the inner solar system? (has four
graphs) - ✔✔Initially, the rate declined smoothly, but there was a later episode of
heavy bombardment followed by resumption of the decline.
Which of the following best describes the orbital evolution of the planets in our solar
system according to the Nice Model? - ✔✔The orbits of the outer planets changed
significantly about 3.9 billion years ago as Uranus and Neptune moved outward from
the Sun.
Which is true about our current understanding of extrasolar planets (exoplanets)? -
✔✔Exoplanets are common and found around many different types of stars.
In general, large planets cool - ✔✔more slowly than small planets of similar
compositions
Important sources of planetary heat include all of the following except - ✔✔the Big
Bang
Which of the following is not a mechanism of heat transport? - ✔✔magnetism
