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Mars
Chapter 9.4 and 10.4
11
Astronomy
Undergraduate 2
10/18/2011

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Cards

Term
Geology of Mars
Definition
polar caps
difference in terrain
volcanoes
evidence of erosion by liquid water
"blueberries"
Term
Vale Marineris
Definition
Mars' most prominent tectonic feature
canyon that perhaps formed through tectonic stresses
Term
Olympus Mons
Definition
tallest volcano in the solar system
concentrated on the Tharsis Bluge, was probably created by a long-lived plume of rising mantle material that bulged the surface upward and provided molten rock for the eruptions that built the giant volcanoes
Term
Evidence of Water Flow
Definition
indistinct rims on craters
sculpted patterns on crater bottoms
blueberries containing minerals found in water
Term
Martian Seasons and Winds
Definition
similar axis tilt to Earth gives Mars seasons, and the ellipicity of its orbit gives it more extreme seasons
changes in atmospheric pressure
changes in the direction of extreme pole-to-pole winds
Term
Axis Tilt
Definition
Jupiter's gravity has a great effect on Mars due to their closeness in orbit
Mars' moons, Phobos and Deimos, are too small to stabilize Mars' axis
smaller tilt=colder temperatures, more carbon dioxide frozen at the poles, and less of an atmosphere to cultivate the greenhouse effect
Term
Why did Mars change?
Definition
Its small size: it was big enough for volcanism and outgassing to release plenty of water and atmospheric gas, but too small to maintain the internal heat needed to prevent the loss of this water and gas
its cooling interior slowed volcanic activity, which released less gas into the atmosphere
its weak gravity and magnetic field allowed existing gas to be stripped into space
Term
How did martians invade popular culture?
Definition
superficial similarities between Mars and Earth
and
Percival Lowell's canals
Term
What are Mars's major geological features?
Definition
tallest volcano
biggest canyon
abundant craters
dried-up lakes, riverbeds
Term
What is Mars like today?
Definition
cold
dry
low atmospheric pressure
frozen water at polar caps
Term
seasonal changes on Mars
Definition
carbon dioxide condenses and sublimate alternately at the poles, creating pole-to-pole wings and duststorms
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