Midterm 1 - Quiz 9
More questions on Mars.
- 1.Which of the following best characterizes a shield volcano?
- A.
It sits above a hot spot in the planet's mantle.
- B.
It has very steep slopes.
- C.
It can erupt only briefly before being dragged off the hot spot.
- D.
It cannot get as high as Mt. Everest bfore the thin crust starts slumping.
- E.
It cannot grow very large, for it has a very short span of eruption.
- 2.Evidence for liquid water at some time in the history of Mars includes:
- A.
Valles Marineris
- B.
Valles Grande
- C.
The "canali" observed by Schiaparelli and Lowell
- D.
All of the above
- E.
None of the above
- 3.Additional evidence for liquid water at some time in the history of Mars includes:
- A.
Runoff channels
- B.
Outflow channels
- C.
"gullies" in craters walls
- D.
All of the above
- E.
None of the above
- 4.Where is the water today on Mars?
- A.
In "permafrost" layers
- B.
In permanently frozen "residual" ice caps at the north and south poles
- C.
In trace amount in atmospheric clouds
- D.
All of the above
- E.
None of the above
- 5.The seasonal changes in the "polar caps" is largely from:
- A.
Dust layers due to very different winter vs summer patterns of dust storms
- B.
Layers of frozen water
- C.
Layers of frozen carbon dioxide (often called "dry ice")
- D.
All of the above
- E.
None of the above
- 6.Mars appears red because:
- A.
Carbon dioxide in Mars' atomosphere reflects dominantly red light
- B.
The surface temperature of Mars means that the planet radiates dominantly in the "red" part of the spectrum.
- C.
Iron(rust-like) compounds in the surface material of the planet.
- D.
All of the above
- E.
None of the above
- 7.Given that Mars' atmosphere is composed of "greenhouse gases" why is the surface temperature not higher?
- A.
"greenhouse" effect only works when there is significant cloud cover on the planet.
- B.
"greenhouse" effect only works when the "greenhouse gases" are less than a few percent of the total atmosphere on the planet.
- C.
Because the overall thin atmosphere there are simply not enough "greenhouse gases" to trap the infrared radiation from the planet surface.
- D.
All of the above
- E.
None of the above
- 8.Dust storms on Mars are about the size of:
- A.
Lake Superior
- B.
Texas
- C.
North America
- D.
Virtually the entire planet
- E.
All of the above
- 9.Carbon dioxide, in addition to being the dominant has in the Martian atmosphere, is also found:
- A.
In polar "ice" caps
- B.
Absorbed in the surface rocks
- C.
All of the above
- D.
None of the above
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