quiz 8 Astronomy

1.
	Jupiter is noticeably oblate because: Student Response Value Correct Answer A. it undergoes a gravitational attraction from each of its various moons.  B. it rotates rapidly. 100%    C. it has such powerful gravity. D. it has a strong magnetic field. E. it has a mantle of liquid metallic hydrogen. Score: 1/1
2.
	What is the name used to describe the dark bands encircling Jupiter? Student Response Value Correct Answer A. brown stripes B. zonal flows  C. belts 100%    D. convection cells E. zones Score: 1/1
3.
	The reason the jovian planets lost very little of their original atmosphere is due to their Student Response Value Correct Answer A. many moons. B. ring systems.  C. large mass. 100%    D. rapid rotation. E. strong magnetic fields. Score: 1/1
4.
	Together which two gases make up 99% of Jupiter's atmosphere? Student Response Value Correct Answer A. Helium and Ammonia B. Ammonia and Methane C. Water Vapor and Methane  D. Hydrogen and Helium 100%    E. Hydrogen and Ammonia Score: 1/1
5.
	Alternating zones of rising and sinking gas in Jupiter's atmosphere Student Response Value Correct Answer A. produced the ring system discovered by Voyager. B. cause Jupiter's magnetic field to ripple. C. generate their own magnetic fields.  D. create light and dark bands. 100%    E. circle the planet from pole to pole. Score: 1/1
6.
	What is the source of Jupiter's excess energy? Student Response Value Correct Answer A. the tidal stresses of the large Galilean moons B. helium rain falling through its interior C. nuclear fusion in its hot, sunlike core of hydrogen D. the decay of radioactive elements in its dense core  E. the slow escape of gravitational energy released during the planet's formation 100%    Score: 1/1
7.
	What is thought to lie at the center of Jupiter? Student Response Value Correct Answer A. a fusion core like the Sun's, with hydrogen being turned into helium B. a hot sea of liquid metallic hydrogen C. a solid core of crystalline helium D. gaseous hydrogen and helium, for Jupiter is not differentiated like Earth  E. a massive core of rocky materials with some iron mixed in 100%    Score: 1/1
8.
	What is true of Jupiter's magnetosphere? Student Response Value Correct Answer A. Although its surface field is greater, since the planet is larger the total field is actually weaker than Earth's.  B. It has a tail that extends at least to Saturn's orbit. 100%    C. It does not trap protons and electrons, as Earth's Van Allen belts do. D. It is most extensive on the sunward side of the planet. E. It is only slightly stronger than Saturn's. Score: 1/1
9.
	What do our magnetic field and Jupiter's share? Student Response Value Correct Answer  A. auroral displays in the polar regions 100%    B. fields that extend outward past Pluto C. same polarity D. fields that extend inward all the way to the Sun E. similar field strength Score: 1/1
10.
	What is thought to be the cause of Io's volcanoes? Student Response Value Correct Answer A. solar radiation focused by Jupiter's gravity B. radioactive decay in Io's interior  C. tidal stresses from both Jupiter and Europa 100%    D. Jupiter's gravity and the heat it creates E. Jupiter's magnetosphere and its charged particles Score: 1/1
11.
	Which of the Galilean moons is the densest and most geologically active? Student Response Value Correct Answer A. Titan  B. Io 100%    C. Europa D. Callisto E. Ganymede Score: 1/1
12.
	The surface of which jovian moon most resembles the pack ice of the Arctic Ocean? Student Response Value Correct Answer A. Io B. Callisto C. Amalthea D. Ganymede  E. Europa 100%    Score: 1/1
13.
	Of the Galilean satellites, which has the oldest, most heavily cratered surface? Student Response Value Correct Answer A. Io  B. Callisto 100%    C. Titan D. Ganymede E. Europa Score: 1/1
14.
	Which of the four Galilean moons is not differentiated? Student Response Value Correct Answer A. Ganymede  B. Callisto 100%    C. Europa D. Io E. None of the above. All the moons are differentiated. Score: 1/1
15.
	Which of the jovian moons is the largest and also the largest moon in the solar system, even bigger than Mercury? Student Response Value Correct Answer A. Callisto B. Triton C. Umbriel D. Titan  E. Ganymede 100%    Score: 1/1
16.
	In size, from largest to smallest, the correct order for the Galilean moons is: Student Response Value Correct Answer A. Callisto, Ganymede, Europa, Io.  B. Ganymede, Callisto, Io, Europa. 100%    C. Io, Europa, Callisto, Ganymede. D. Europa, Ganymede, Io, Callisto. E. Ganymede, Callisto, Europa, Io. Score: 1/1
17.
	Where is Jupiter's ring located? Student Response Value Correct Answer A. above Jupiter's cloud tops and inside the orbit of its inner-most moon     B. between the orbits of Io and Europa 0% C. between the orbit of the inner-most moon and the orbit of Io D. in a thin ring at the distance of Io but inclined by an angle of about 30 degrees to Io's orbit E. sharing the orbit of Amalthea Score: 0/1
18.
	Which statement about Jupiter's rings is false? Student Response Value Correct Answer  A. They are made of ice, like Saturn's. 100%    B. They may be made in part of material from Metis and Adrastea. C. They lie in the planet's equatorial plane. D. They lie closer to Jupiter than Io's orbit. E. They are made of dark dusty particles. Score: 1/1
19.
	Colors in Jupiter's clouds are largely due to helium compounds. Student Response Value Correct Answer False 100% False Score: 1/1
20.
	All the Galilean moons are in synchronous rotation, with the same face always pointed toward Jupiter, except for tidally stressed Io. Student Response Value Correct Answer True 100% True Score: 1/1
21.
	If it were about 80 times as massive as present, Jupiter could become a star. Student Response Value Correct Answer False 0% True Score: 0/1
22.
	While hydrogen, helium, water, and ammonia can produce the white coloration of Jupiter's zones, the brownish color of the belts requires more complex chemistry. Student Response Value Correct Answer False 0% True Score: 0/1