Upgrade to remove ads
Ch. 8 AST 105
Terms in this set (39)
Where is probably the best place to find life on Mars today?
in geologically active areas like Tharsis where subsurface water may exist
Other astronomers were skeptical about Percival Lowell's claims of Martian canals because
when they pointed their own telescopes toward Mars they couldn't see them
The Tharsis region of Mars was most likely formed
by a plume of molten mantle material rising to the surface forming a giant bulge in the Martian crust
The Meridani Plains were chosen as the landing site for the Mars Exploration Rover Opportunity because
remote sensing measurements from the Mars Odyssey orbiter indicate that deposits of the mineral hematite (which commonly forms in water) are present
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
Gusev Crater was chosen at the landing site for the Mars Exploration Rover Spirit because
we believe this region was once filled with water
As far as we know, the first scientist to seriously suggest the possibility of life on Mars was
The first scientist to measure the rotation period of Mars was
Observations by the Mars Odyssey orbiter show that most of the water on Mars today is
frozen beneath the surface
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 most important geological process that has removed craters from the Martian surface in the past is
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 discovery of opaline and hydrated sulfate minerals on Mars by the rover Spirit suggests that Mars once had
volcanically heated thermal hot springs
Even though 95% of the Martian atmosphere is composed of carbon dioxide, the greenhouse effect on Mars today is very weak because its atmosphere is very
When Percival Lowell insisted on the existence of Martian canals, even though his observations were discredited by other scientists, he exhibited
What field of science were the experiments on the two Viking lander most closely related to?
What is the nickname of the Mars Science Laboratory rover that landed on Mars in 2012?
What field of science are the experiments on the two Mars Exploration Rovers most closely related to?
What are the relative ages of the heavily cratered Southern highlands and the smooth Northern plains of Mars?
the highlands are older than the plains
Results from the Mars Exploration Rovers Spirit and Opportunity suggest that liquid water
was once plentiful on the surface of Mars
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
At the Mars Pathfinder landing site, the surrounding rocks are scattered and stacked against each other. This suggests that the spacecraft landed in
an ancient floodplain
The indistinct rims of large craters and the relative lack of small craters on Mars may be due to
winds, rainfall, and glaciers
The first astronomer to claim to see linear features on the surface of Mars was
The Southern hemisphere of Mars is at
a higher than average elevation and is covered with impact craters
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
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
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 did the Martian surface look like from the Viking lander sites?
a dry, dusty, boulder-strewn desert
Seasonal variations on Mars are due
to both its axis tilt and its changing distance from the Sun
Significant quantities of water last flowed on the surface of Mars during which geological era?
The seasonal polar caps on Mars are made of
carbon dioxide ice
During summer, the northern polar cap of Mars is made of
a layer of water ice
Which of the following statements best describes the idea behind the Carbon Assimilation Experiment on board the Viking landers?
living organisms in the soil should incorporate carbon from atmospheric gases
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 Martian meteorite ALH84001 was found in the
How easy would it be for future astronauts to psychologically adapt to living on Mars?
fairly easy because the Martian day is only about 40 minutes longer than the terrestrial day
Which was the only biology experiment on the Viking landers which gave a positive result?
Spacecraft orbiting Mars have detected hydrated minerals, such as clays, sulfates, and silica, which are known to form in the presence of
The interior of Mars cooled more quickly than the interior of the Earth because it has
a larger surface area-to-volume ratio
This set is often in folders with...
AST 103 Test 2
Extraterrestrial Life Chapter 8
Extraterrestrial Life Chapter 9
Extraterrestrial Life Chapter 10
You might also like...
NATS 1880 - Chapter 8
Nats Chapter 8
Other sets by this creator
Frog Families Details
Amphibian Families Simple
Natural History People 1
Alabama Fish Families (Details)
Other Quizlet sets
NR 150 Exam 2
Oceanography iclicker : Unit 2