quiz 6 Astronomy

1.
	What is the reason that it is so difficult to view Mercury from Earth? Student Response Value Correct Answer A. Mercury can't be seen at night.  B. Mercury is always very close to the Sun. 100%    C. Mercury is very dim. D. Mercury is very small. E. Mercury is often hidden by the Moon. Score: 1/1
2.
	Mercury experiences extreme high and low temperatures between night and day because: Student Response Value Correct Answer A. Mercury has no axial tilt, with its equator always exposed to direct sunlight. B. its dense atmosphere creates a runaway greenhouse.  C. it has no atmosphere to moderate temperatures over the globe. 100%    D. its oceans are much hotter than ours. E. it is so close to the Sun. Score: 1/1
3.
	How do the atmospheres of the Moon and Mercury compare? Student Response Value Correct Answer A. The cooler Moon retains a thicker nitrogen atmosphere. B. As no spacecraft has yet landed there, no information exists about Mercury's. C. They are about equal, each only 1% as dense as ours. D. Mercury's is much denser, like Venus, with much carbon dioxide.  E. Neither body has a permanent atmosphere. 100%    Score: 1/1
4.
	One of the effects of Mercury's very slow spin is Student Response Value Correct Answer A. large variations in the size of its polar cap. B. wind patterns that are slow, but global in size. C. tectonic activity.  D. extreme variations in its surface temperature. 100%    E. an intensely powerful magnetic field. Score: 1/1
5.
	The lunar mare are found: Student Response Value Correct Answer A. anywhere large meteor impacts created deep basins. B. almost entirely on the far side, which was more likely to be hit. C. mainly in the south polar region, where the largest impact occurred.  D. almost entirely on Earth side, where the crust was thinner. 100%    E. not at all, since no liquid water really exists on the Moon. Score: 1/1
6.
	The lunar highlands are: Student Response Value Correct Answer A. made of lighter colored, younger rocks than the mare. B. formed by plate tectonics, like the Earth's Himalayas.  C. more rugged, heavily cratered , and older than the lunar mare. 100%    D. formed by volcanic eruptions, much like our Andes. E. brighter than the mare, since they are covered with reflective glass from the rays. Score: 1/1
7.
	Mercury presents the same side to the Sun Student Response Value Correct Answer A. every third orbit. B. every 12 hours.  C. every other orbit. 100%    D. all the time, just like our Moon. E. twice every orbit. Score: 1/1
8.
	What did radar astronomers find in the polar regions of Mercury? Student Response Value Correct Answer A. rift valleys B. polar caps of dry ice that vary seasonally, much like Mars C. large mare basins, such as near our Moon's south pole  D. water ice that never melts in the deep craters 100%    E. auroral displays much like Earth's Score: 1/1
9.
	What is true of the Moon's orbital and rotational periods? Student Response Value Correct Answer A. The orbital period is longer.  B. They are equal. 100%    C. The orbital period is greatest at full moon. D. The rotational period is longer. E. The rotational period varies with the Moon's phase. Score: 1/1
10.
	The rate of cratering in the lunar highlands shows us that Student Response Value Correct Answer  A. they range from 4.6 - 4.4 billion years old, on average. 100%    B. the oldest rocks are at least as old as the mare, but some craters are much younger. C. most of the asteroids must have hit the Moon, not the earth. D. they must be younger than the older, darker mare. E. the largest impacts are the youngest, such as Copernicus and Tycho. Score: 1/1
11.
	Which type of feature is the best evidence of lunar volcanism? Student Response Value Correct Answer A. vents seen erupting in the mountainous highlands B. craters all over the Moon C. the Orientale Basin D. rays around the latest eruptions  E. rilles associated with lava flows accompanying the mare formation 100%    Score: 1/1
12.
	Which of these features is attributed to the shrinking of Mercury's core? Student Response Value Correct Answer A. mare B. rays  C. scarps 100%    D. rilles E. craters Score: 1/1
13.
	The scarps on Mercury were probably caused by Student Response Value Correct Answer A. meteorite bombardment. B. a tidal bulge. C. tectonic activity.  D. the interior cooling and shrinking. 100%    E. volcanism. Score: 1/1
14.
	Moonquakes on the Moon were detected by: Student Response Value Correct Answer A. seismographs attached to the Russian Lunar rovers. B. laser beams reflected off mirrors left on the Moon by Apollo missions. C. the radar observations over time from earth.  D. the seismographs left these by the Apollo astronauts. 100%    E. telescopic observations of lunar landslides. Score: 1/1
15.
	How does Mercury's magnetic field compare to our own? Student Response Value Correct Answer A. It was predicted from Mercury's rapid rotation and molten core. B. Like Venus, Mercury has no detectable magnetic field. C. It is amazingly strong, comparable to our own. D. Like Mars and the Earth, it too has undergone polarity reversals.  E. It is 1/100th as strong as ours, but does deflect the solar wind to some degree. 100%    Score: 1/1
16.
	The cratering of the lunar highlands shows us: Student Response Value Correct Answer A. they have been unchanged for the last 4.6 billion years.  B. they are older than the smoother maria. 100%    C. they were made of more rigid lavas than the basalts that made the maria. D. they are like the Earth's continents, removed from the tectonic cycle of the mare. E. they are younger than the maria. Score: 1/1
17.
	How are the polar regions of Mercury and the Moon similar? Student Response Value Correct Answer  A. Both seem to have ice pockets in the deepest, darkest crater floors. 100%    B. Both have bright dry ice polar caps, like Mars. C. Both are covered by huge mare-type basins from impacts. D. Both have been hit by large comets that melted there. E. Both have lakes of liquid water under their regolith. Score: 1/1
18.
	Two Mercury years are the same length as three Mercury sidereal days. Student Response Value Correct Answer False 0% True Score: 0/1
19.
	Mercury has "weird terrain" directly opposite its huge Caloris Impact Basin. Student Response Value Correct Answer True 100% True Score: 1/1
20.
	Mercury's magnetic field is surprisingly comparable to the Earth's field in strength. Student Response Value Correct Answer True 0% False Score: 0/1
21.
	The high eccentricity of Mercury's orbit probably has nothing to do with Mercury's 3:2 synch of rotation and revolution. Student Response Value Correct Answer True 0% False Score: 0/1
22.
	Mercury has the widest variation in surface temperatures between night and day of any planet in the solar system. Student Response Value Correct Answer True 100% True Score: 1/1