Astronomy Exam 7
From particles ejected off of its moons
How did Jupiter's rings form?
We don't know
How did Mars get its moons?
3.5 au
How far from the Sun is the Snow Line?
4
How many rings does Jupiter have?
Venus
In its composition, Mars' atmosphere most clearly resembles which other planet?
Jupiter, Saturn, Uranus, Neptune
List the final planets from largest to smallest
Liquid water at some point in the past
Martian blueberries provide strong evidence for what?
Iron
Nearly half of Mercury's volume is composed of what element?
Mercury
Of all the terrestrial planets, which has the longest solar day?
Venus
Of the terrestrial planets, which has the longest sidereal day?
Ice particles
Of what are Saturn's rings composed?
Solid CO2
Of what are the polar caps of Mars most primarily composed?
Sulfuric acid
Of what do clouds of Venus exist?
Mars
Other than Earth, which world has the most evidence for surface features affected by winds?
The smaller
Two planets orbit a distant star, if the planets have identical compositions, which one cools the fastest?
High pressure zones
What are the light-colored bands on Jupiter?
Methane
What causes the blue appearance of the planets Uranus and Neptune?
It was resurfaced with lava from its interior
What happened to Venus about one billion years ago?
Hurricane
What is Jupiter's Great Red Spot?
distance from planet within which tides destroy orbiting object
What is the Roche limit?
It rotates so slowly
What is the most likely reason Venus' magnetic field is so weak?
Carbon dioxide
What is the principle component of Venus' atmosphere?
Only moon with substantial atmosphere
What is unique about Titan?
Retrograde Orbit
What is unique about Triton?
Mercury
What planet has the greatest variance in surface temperature?
Tides, Tidal Forces
What powers the geological activity on Jupiter's moons?
Rings, rocky cores, fast rotation, stron magnetic fields
What properties do all gas giants share?
Rings, rocky cores, fast rotation, strong magnetic fields
What properties do all gas giants share?
During the earliest phase of formation - differentiation
When were the iron cores of terrestrial planets formed?
Earth
Which is the largest of the terrestrial planets?
Callisto
Which is the least geologically active of Jupiter's moons?
Io
Which is the most geologically active of Jupiter's moons?
Mercury
Which planet has the highest density?
Saturn
Which planet has the lowest density?
Uranus
Which planet has the most extreme seasons?
Venus
Which planet rotates backwards?
Uranus
Which planet rotates perpendicular to its orbit?
Mars and Venus
Which planets have the most similar atmosphere?
Venus
Which terrestrial world experiences the strongest greenhouse effect?
Mercury
Which terrestrial world has the least evidence for volcanism?
The moon
Which terrestrial world is most similar to Mercury?
Venus
Which terrestrial world is the most affected by volcanism?
It catches a bit of solar wind
Why does Mercury have a thin layer of hydrogen and helium as an atmosphere?