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Terms in this set (30)
The first astronomer to claim to see linear features on the surface of Mars was
The most recent time that water appears to have flowed on Mars if only briefly, is during the,
Due to its elliptical orbit Mars is closer to the Sun on average during summer in the Southern Hemisphere. This means Southern Summer on Mars will be,
Short and hot
The lightly cratered terrain surrounding the Tharsis volcanoes represents which geological era?
Why is the possible contamination of the Earth by Martian microbes in a future sample return mission not considered to be a significant problem?
Martian microbes are likely to be quite different than terrestrial microbes and, hence, will probably not be able to affect life on Earth
In the Tharsis region of Mars we find
Huge shield volcanoes like Olympus Mons
The presence of channels carved out on the slopes of large Martian volcanoes is consistent with
The existence of past underground pockets of water
The Martian meteorite ALH84001 was found in the
The ancient water erosion features on the surface of Mars suggest that the planet must have
had a much warmer, thicker atmosphere in the past
Which of the following did NOT contribute to the thinning of the Martian atmosphere during its early history?
the consumption of carbon dioxide by photosynthetic bacteria
What is the most convincing piece of evidence to suggest that Martian meteorites actually come from Mars?
they contain trapped gases with a similar composition to the Martian atmosphere
The Phoenix spacecraft which landed in the Martian arctic in 2008 found
Water ice just beneath the surface of the planet
The water that formed many of the erosion features seen on Mars appears to have originated
from beneath the surface of the planet
The seasonal polar caps on Mars are made of
Carbon dioxide ice
The most important geological process occurring on Mars today is
Seasons on Mars
are similar to those on Earth but twice as long
Liquid water cannot exist for very long on the surface of Mars today because
its atmosphere is too thin
During summer the northern polar cap of Mars is made of,
a layer of water ice
Compared to the Earth Mars has experienced wild swings in its axis tilt over relatively short time periods. This is because of its,
proximity to Jupiter and its lack of a large moon
Significant quantities of water last flowed on the surface of Mars during which geological era?
What are the most likely sources of the methane gas detected in the Martian atmosphere by the Mars Express orbiter?
biological and/or volcanic activity.
Why is the claim of fossilized life in the Martian meteorite ALH84001 controversial?
there are many possible non-biological explanations for the observed evidence
If melted the ice now known to be on Mars would represent water to cover the entire planet to a depth of:
around 11 meters
The tiny spheres called 'blueberries' discovered by the rover Opportunity are made of
The residual polar caps on Mars are made of
The Southern hemisphere of Mars is at
a higher than average elevation and is covered by impact craters
Why must lander probes on Mars be sterilized before launch?
to prevent terrestrial microbes hitching a ride on the probe and contaminating the Martian surface
Where is probably the best place to find life on Mars today?
in geologically active areas like Tharsis where subsurface may exist
What is the origin of Martian meteorites?
They are rocks blasted from the surface of Mars by impacts; these rocks then floated around in interplanetary space before falling to earth.
The most important geological process that has removed craters from the Martian surface in the past is
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