Astronomy college course/Galilean moons of Jupiter/questions


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AstroGalileanMoons_Study
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AstroGalileanMoons_Study-v1s1
/1/. How does the density of a Galilean moon depend on its distance from Jupiter?
 * ___ a) all the moons have nearly the same density


 * ___ b) the density of the moons is unknown


 * ___ c) the more dense moon is closer to Jupiter (always)


 * ___ d) the less dense moon is closer to Jupiter (always)


 * ___ e) the most dense moon is neither the closest nor the most distant

/2/. How does the mass of a Galilean moon depend on its distance from the central body?
 * ___ a) the mass of the moons is unknown


 * ___ b) the more massive moon is closer to Jupiter (always)


 * ___ c) the less massive moon is closer to Jupiter (always)


 * ___ d) the most massive moon is neither the closest nor the most distant


 * ___ e) all the moons have nearly the same mass

/3/. Does Jupiter's moon Io have craters?
 * ___ a) yes, about half from impacts and the others from volcanoes


 * ___ b) yes, from volcanoes


 * ___ c) no, the surface is too new


 * ___ d) yes, from impacts


 * ___ e) no, the surface is too old

/4/. The mechanism that heats the cores of the Galilean moons is
 * ___ a) radiation from the Sun and from Jupiter


 * ___ b) radiation from the Sun


 * ___ c) radioactive decay of heavy elements


 * ___ d) tides from the other moons and Jupiter


 * ___ e) tides from Jupiter

/5/. Immediately after publication of Newton's laws of physics (Principia), it was possible to "calculate" the mass of Jupiter. What important caveat applied to this calculation?
 * ___ a) tides from the other moons and Jupiter.


 * ___ b) They needed to wait over a decade for Jupiter to make approximately one revolution around the Sun.


 * ___ c) Only the mass of Jupiter relative to that of the Sun could be determined.


 * ___ d) The different moons yielded slightly different values for the mass of Jupiter.


 * ___ e) The different moons yielded vastly different values for the mass of Jupiter.

/6/. Ganymede, Europa, and Io have ratios in __________ that are 1:2:4.
 * ___ a) orbital period


 * ___ b) Two other answers are correct (making this the only true answer).


 * ___ c) rotational period


 * ___ d) density


 * ___ e) Argon isotope abundance

/7/. Which of Jupiter's moons has an anhydrous core?
 * ___ a) Ganymede


 * ___ b) Io


 * ___ c) Ganymede


 * ___ d) Two other answers are correct (making this the only true answer).


 * ___ e) Europa

Key to AstroGalileanMoons_Study-v1s1
/1/. How does the density of a Galilean moon depend on its distance from Jupiter?
 * - a) all the moons have nearly the same density


 * - b) the density of the moons is unknown


 * + c) the more dense moon is closer to Jupiter (always)


 * - d) the less dense moon is closer to Jupiter (always)


 * - e) the most dense moon is neither the closest nor the most distant

/2/. How does the mass of a Galilean moon depend on its distance from the central body?
 * - a) the mass of the moons is unknown


 * - b) the more massive moon is closer to Jupiter (always)


 * - c) the less massive moon is closer to Jupiter (always)


 * + d) the most massive moon is neither the closest nor the most distant


 * - e) all the moons have nearly the same mass

/3/. Does Jupiter's moon Io have craters?
 * - a) yes, about half from impacts and the others from volcanoes


 * + b) yes, from volcanoes


 * - c) no, the surface is too new


 * - d) yes, from impacts


 * - e) no, the surface is too old

/4/. The mechanism that heats the cores of the Galilean moons is
 * - a) radiation from the Sun and from Jupiter


 * - b) radiation from the Sun


 * - c) radioactive decay of heavy elements


 * + d) tides from the other moons and Jupiter


 * - e) tides from Jupiter

/5/. Immediately after publication of Newton's laws of physics (Principia), it was possible to "calculate" the mass of Jupiter. What important caveat applied to this calculation?
 * - a) tides from the other moons and Jupiter.


 * - b) They needed to wait over a decade for Jupiter to make approximately one revolution around the Sun.


 * + c) Only the mass of Jupiter relative to that of the Sun could be determined.


 * - d) The different moons yielded slightly different values for the mass of Jupiter.


 * - e) The different moons yielded vastly different values for the mass of Jupiter.

/6/. Ganymede, Europa, and Io have ratios in __________ that are 1:2:4.
 * - a) orbital period


 * + b) Two other answers are correct (making this the only true answer).


 * - c) rotational period


 * - d) density


 * - e) Argon isotope abundance

/7/. Which of Jupiter's moons has an anhydrous core?
 * - a) Ganymede


 * + b) Io


 * - c) Ganymede


 * - d) Two other answers are correct (making this the only true answer).


 * - e) Europa


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