FREE! Click here to Join FunTrivia. Thousands of games, quizzes, and lots more!
Quiz about Ganymede a Mighty Moon
Quiz about Ganymede a Mighty Moon

Ganymede: a Mighty Moon Trivia Quiz


Think our moon is big? Think again. Ganymede is even bigger. Try to answer these ten questions about the largest moon in the Solar System.

A multiple-choice quiz by bernie73. Estimated time: 5 mins.
  1. Home
  2. »
  3. Quizzes
  4. »
  5. Science Trivia
  6. »
  7. Our Solar System
  8. »
  9. Moons

Author
bernie73
Time
5 mins
Type
Multiple Choice
Quiz #
397,876
Updated
Dec 03 21
# Qns
10
Difficulty
Tough
Avg Score
6 / 10
Plays
174
Question 1 of 10
1. While our Moon (orbiting Earth) has been known to us since prehistoric times, Ganymede was not discovered until the 1600s. Which well-known astronomer discovered Ganymede? Hint


Question 2 of 10
2. As stated in the introduction, Ganymede is the largest moon in the Solar System. It is so large that not even all of the planets are larger. Which planet or planets has a smaller diameter than Ganymede? Hint


Question 3 of 10
3. Ganymede is part of a group of four satellites that orbit Jupiter. What is the correct order of the satellites from closest to Jupiter to farthest away? Hint


Question 4 of 10
4. Gravity could be an important factor if humans visit Ganymede. Which of these bodies has gravity that is closest to that of Ganymede? Hint


Question 5 of 10
5. Water could also be an important factor for human visitors to Ganymede. Which best describes the amount of water available on Ganymede? Hint


Question 6 of 10
6. The interior of Ganymede is believed to be similar to that of Europa. Along with nickel, which other element is most common at Ganymede's core? Hint


Question 7 of 10
7. Unlike many moons in the Solar System, Ganymede is large enough to have an atmosphere. Does oxygen make up a significant portion of Ganymede's atmosphere?


Question 8 of 10
8. How does the mass of Ganymede compare to that of Mars and Mercury? Hint


Question 9 of 10
9. Several unmanned missions have entered Jupiter's orbit and approached Ganymede. Which of these is one of them? Hint


Question 10 of 10
10. Ganymede has cratering similar to that observed on the Moon and Mercury. How do Ganymede's craters compare to those? Hint



(Optional) Create a Free FunTrivia ID to save the points you are about to earn:

arrow Select a User ID:
arrow Choose a Password:
arrow Your Email:




Most Recent Scores
Feb 27 2024 : Guest 72: 2/10
Feb 23 2024 : Guest 24: 9/10

Quiz Answer Key and Fun Facts
1. While our Moon (orbiting Earth) has been known to us since prehistoric times, Ganymede was not discovered until the 1600s. Which well-known astronomer discovered Ganymede?

Answer: Galileo Galilei

Galileo, using an early telescope, observed a set of heavenly bodies near Jupiter in 1609/1610 and thought they were fixed stars. After observing them for several days, he realized were not fixed stars, but instead were in orbit around Jupiter. He initially named them the Cosmian Stars or Medician Stars, in honor of Cosimo de Medici, ruler of Tuscany. Over time, the suggestion of Simon Marius and Johannes Kepler to name them after some of the lovers of Jupiter, King of the Roman gods, would take hold.

The four moons would be called Ganymede, Europa, Io, and Callisto. Ganymede was a beautiful mortal whom Jupiter claimed to serve as his cupbearer. He would grant Ganymede eternal youth and immortality. Galileo Galilei (1564-1642), in addition to his extensive work in astronomy, also made contributions to engineering and physics.
2. As stated in the introduction, Ganymede is the largest moon in the Solar System. It is so large that not even all of the planets are larger. Which planet or planets has a smaller diameter than Ganymede?

Answer: Mercury

Ganymede has a diameter of 3,273 miles. (By comparison, the distance from Seattle to Miami is 3,318 miles.) Mercury is slightly smaller with a diameter of 3,032 miles. The diameter of Mars is 4,212 miles. Interestingly, though Mercury is smaller in terms of diameter, because of differing composition, it is approximately twice as massive as Ganymede. In comparison to many of the smaller moons of Jupiter, Ganymede is large enough, and massive enough, to have a roughly spherical shape.

From 1930 to 2005, we would have had to add Pluto to the list of planets smaller than Ganymede. Though it is currently classed as a dwarf planet, Pluto is significantly smaller than Ganymede, with a diameter of 1,477 miles.
3. Ganymede is part of a group of four satellites that orbit Jupiter. What is the correct order of the satellites from closest to Jupiter to farthest away?

Answer: Io, Europa, Ganymede, Callisto

Ganymede has a mean distance of 665,100 miles from Jupiter. By comparison, Io is about 262,000 miles from Jupiter on average, Europa is about 416,900 miles, and Callisto is about 1,161,300 miles. Ganymede orbits Jupiter in about seven days, three hours. Because Jupiter and Ganymede are tidally locked, the same side of Ganymede always faces Jupiter. Europa orbits twice in the time it takes Ganymede to orbit once and Io orbits four times. Callisto's orbit is more than twice as long as Ganymede's at about 16 days, 17 hours.

Ganymede travels in its orbit at about 6.7 miles/second. Its orbit is relatively regular with an eccentricity of 0.0013.
4. Gravity could be an important factor if humans visit Ganymede. Which of these bodies has gravity that is closest to that of Ganymede?

Answer: Moon

The simplest way to answer this question is to compare the weight of the same individual in different locations. A person who weighed 100 pounds on Earth would weigh about 14.6 pounds on Ganymede. The same person would weigh about 16.5 pounds on the Moon, about 37.9 pounds on Mars, and about 2.9 pounds on the asteroid/dwarf planet Ceres.

Interestingly, the Moon has a slightly higher gravity than Ceres, even though Ganymede has a mass about twice than that of the Moon. This is due to Ganymede having a much lower density.
5. Water could also be an important factor for human visitors to Ganymede. Which best describes the amount of water available on Ganymede?

Answer: Water is very common on Ganymede

It is believed that there is a substantial amount of water on Ganymede, both on the surface and also in the form of an ocean below ground. The problem for human visitors would be that the water on Ganymede is almost entirely in the form of ice. With the typical range of surface temperature on Ganymede varying between about -333 degrees Fahrenheit and -186 degrees Fahrenheit, an additional heat source would be needed to bring the ice up to 32 degrees Fahrenheit so that it could melt.

It is possible that the ocean below the surface is liquid as temperatures there may be warmer.
6. The interior of Ganymede is believed to be similar to that of Europa. Along with nickel, which other element is most common at Ganymede's core?

Answer: Iron

The iron-nickel core of Ganymede is believed to be at a temperature of about 2200-2600 degrees Fahrenheit. The core is likely to be liquid because of the high temperature and despite the higher level of pressure. Surrounding the iron-nickel core is a rocky mantle and then the interior ocean and surface.

It is believed that the presence of iron produces a magnetic field around Ganymede. This magnetic field would largely be masked from a distance by Jupiter's own magnetic field.
7. Unlike many moons in the Solar System, Ganymede is large enough to have an atmosphere. Does oxygen make up a significant portion of Ganymede's atmosphere?

Answer: Yes

The oxygen is probably released by solar radiation breaking the surface ice apart into hydrogen and oxygen. By comparison with the Earth, the atmosphere on Ganymede is very thin, roughly equivalent to Earth's exosphere (or outermost layer of atmosphere). Multiple forms of oxygen are found in Ganymede's atmosphere including O2 and O3 (ozone).
8. How does the mass of Ganymede compare to that of Mars and Mercury?

Answer: Its mass is less than that of either

The mass of Ganymede is about 1.4819 times 10 to the 23rd power kilograms. This is about 1/40 that of Earth and about half of Mercury's mass. Despite being significantly bigger than Mercury, the large amount of water on Ganymede gives the moon a lower average density. Mars, by comparison, has a mass about four times that of Ganymede.
9. Several unmanned missions have entered Jupiter's orbit and approached Ganymede. Which of these is one of them?

Answer: Galileo

The Jupiter Orbiter Probe launched by the Galileo spacecraft performed several flybys of the four large moons of Jupiter as well as one flyby of the smaller moon of Amalthea. The primary mission of the probe lasted from 1989 to 1997 with extended missions lasting until 2003. The probe was purposely sent on a one-way trip into Jupiter's atmosphere in 2003 to prevent any bacteria on the probe from contaminating the moons. The probe was able to observe Ganymede's magnetic field.

The Magellan probe was sent to Venus. The Viking mission was sent to Mars. The Cassini probe was sent to Saturn.
10. Ganymede has cratering similar to that observed on the Moon and Mercury. How do Ganymede's craters compare to those?

Answer: Ganymede's craters are less pronounced

It is thought that Ganymede experienced heavy cratering at about the same time the Moon did (about 3.5 to 4 billion years ago). On Ganymede the darker areas of terrain tend to have heavy cratering whereas the lighter grooved areas have less cratering.

It is thought that Ganymede's icy crust is weaker than that found on the Moon or Mercury, leading to the craters having become more flattened over time.
Source: Author bernie73

This quiz was reviewed by FunTrivia editor rossian before going online.
Any errors found in FunTrivia content are routinely corrected through our feedback system.
3/5/2024, Copyright 2024 FunTrivia, Inc. - Report an Error / Contact Us