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astronomy test 2
chapter 10
40
Astronomy
11/04/2011

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Term
Which of the following provides evidence that water once flowed on Mars?
Definition
Runoff and outflow channels
Term
what occurs during southern summer on Mars?
Definition
very large dust storms
Term
what is the source of Mars's red color?
Definition
iron oxide in the soil
Term
the lack of global magnetic field on Mars is probably related to which of the following considerations?
Definition
the composition of its core
Term
which statement is NOT true about the polar caps of Mars?
Definition
they are predominantly water ice, with a small amount of carbon dioxide
Term
the surface of Mars shows which of the following principal characteristics?
Definition
two distinctly different regions with different cratering records and histories
Term
which statement is NOT true about the moons of Mars?
Definition
they are predominantly iron with a small amount of silicon dioxide
Term
how do the sizes of Earth, Venus, and Mars compare?
Definition
Earth is slightly larger than Venus and much larger than Mars
Term
which of the following statements about the planetary feature known as Olympus Mons is true?
Definition
It is a volcanic peak on Mars nearly as big across as Texas
Term
which one of the following is NOT a property of the Tharsis bulge?
Definition
it is covered by numerous impact craters
Term
what is significance of crater Yuty?
Definition
it is a splash crater
Term
how does Mars's orbital eccentricity compare with those of other planets in the solar system?
Definition
It is much larger than the eccentricities of most of the planets
Term
life on Mars-past or present is a highly controversial subject. Which of the following is not cited as possible evidence of ancient life on Mars?
Definition
evidence of cell walls fossilized in meteorites
Term
why didn't plate tectonics ever develop on Mars?
Definition
Mars's interior cooled too quickly
Term
Why is Martian summer in the southern hemisphere so much hotter than Martian summer in the northern hemisphere?
Definition
Mars is much closer to the Sun during the southern summer
Term
T or F; water once flowed on the surface of Mars
Definition
True
Term
why is Mars red?
Definition
the iron in the surface rocks have been oxidized over time
Term
compared with Earth's diameter, the diameter of Mars is
Definition
significantly smaller
Term
T or F; the density of Mars is very similar to that of the other terrestrial planets
Definition
False
Term
rank these magnetic fields, from weakest to strongest
Definition
the moon, mercury, mars, venus
Term
the moons of mars
Definition
are probably captured asteroids
Term
T of F; because of its axial tilt and more elliptical orbit, Mars's polar caps change size even more than do the earth's
Definition
True
Term
what physical feature of Mars are atypical compared with the other terrestrial planets?
Definition
its atmospheric content
Term
unlike Earth, Mars' seasons are affected (enhanced and diminished) by the distance between Mars and the Sun. This is because
Definition
the orbit of Mars is significantly are elliptical
Term
why is the southern hemisphere of Mars believed to be older than the northern?
Definition
the southern hemisphere is more heavily cratered
Term
T or F; running water continues to the major erosive factor of Mars today
Definition
False
Term
compare the atmospheres of Mars and Venus
Definition
both are chiefly carbon dioxide, but at Mars it can freeze as dry ice
Term
How many moons does Mars have?
Definition
two
Term
assuming that features you can see on Mars are similar to features found on Earth, what would a casual inspection of the interactive photo of Mars lead you to suspect about water on Mars?
Definition
surface water only exist as frozen ice
Term
which of the following Mars surface features provides dramatic evidence that volcanism has played a role in shaping the surface of Mars?
Definition
Olympus Mons
Term
when you zoom in on the section labeled 'southern highlands,' which geologic processes are most clearly evident?
Definition
impact cratering and erosion
Term
Volcanism
Definition
Big Island of Hawaii
Mars's Olympus Mons
Smooth surface of the lunar maria
Term
old surface features of the lunar highlands
Definition
Impact cratering
Term
earth's Grand Canyon caused by?
Definition
erosion
Term
Current locations of Earth's continents
Mars's Valles Mariners
Mercury's many long, tall cliffs
THEY ARE ALL CAUSED BY?
Definition
Tectonics
Term
Fastest cooling to Slowest cooling
Definition
mercury, mars, venus, earth
Term
Longest volcanic/tectonic activity to shortest
Definition
Earth, Mars, Mercury
Term
Venus
Definition
sulfuric acid clouds, almost no wind, runaway greenhouse effect
Term
earth
Definition
atmosphere composed primarily of nitrogen, ultraviolet-absorbing stratosphere
Term
mars
Definition
extreme low density atmosphere, global dust storms