Chapter 11 JUPITER

Jupiter puts back into space twice the energy it gets from the Sun. TrueFalse

What is the source of Jupiter's excess energy? A: the decay of radioactive elements in its dense core B: the slow escape of gravitational energy released during the planet's formation C: nuclear fusion in its hot, sunlike core of hydrogen D: helium rain falling through its interior E: the tidal stresses of the large Galilean moons

What do our magnetic field and Jupiter's share? A: fields that extend inward all the way to the Sun B: same polarity C: auroral displays in the polar regions D: fields that extend outward past Pluto E: similar field strength

Jupiter's magnetic field is much stronger than Earth's, and has a magnetic tail that extends beyond the orbit of Saturn. TrueFalse

Like Earth, Jupiter's internal energy is generated chiefly by radioactive decay. TrueFalse

How large is Jupiter's magnetosphere? A: It is a million times the volume of the Earth's, extending beyond the orbit of Saturn. B: It envelopes even the Sun and rest of the solar system. C: It is so large it extends out to the orbit of Io. D: It extends inward to the orbit of Mars. E: It is about as large as the Earth's.

Which of the Galilean moons is the densest and most geologically active? A: Callisto B: Ganymede C: Europa D: Io E: Titan

Some of Jupiter's smaller outer moons have retrograde orbits, indicating capture occurred. TrueFalse

What is the major component of Io's volcanic flows? A: sulfur and its compounds B: basaltic lava, like the lunar mare C: carbon dioxide and water vapor, as with our eruptions D: liquid nitrogen, like the eruptions of Triton E: iron oxide, as on Mars

Which of the four Galilean moons is NOT differentiated? A: EuropaIo B: Ganymede C: Callisto D: None of the above. All the moons are differentiated.

What is thought to be the cause of Io's volcanoes? A: Jupiter's gravity and the heat it creates B: radioactive decay in Io's interior C: Jupiter's magnetosphere and its charged particles D: tidal stresses from both Jupiter and Europa E: solar radiation focused by Jupiter's gravity

What is the origin of the Jovian moons? A: They all formed with the planet. B: They were main-belt asteroids, captured by Jupiter's strong gravity. C: They were ripped from the planet's interior in an early cataclysmic event. D: The four Galilean moons formed with Jupiter, most others were later captured. E: They are Trojan asteroids, orbiting 60 degrees ahead or behind Jupiter.

Which of the jovian moons is the largest and also the largest moon in the solar system, even bigger than Mercury? A: Titan B: Triton C: Callisto D: Umbriel E: Ganymede

When comparing the densities of the Galilean moons, the farther from Jupiter, the greater their density. TrueFalse

All four of the Galilean moons have substantial amounts of liquid water under a surface layer of ice. TrueFalse

The liquid layer in Europa is composed primarily of: A: molten rock, similar to Earth's mantle. B: ethane, similar to Neptune's moon Triton. C: molten metal, similar to Earth's outer crust. D: water, similar to Earth's oceans. E: liquid hydrogen, similar to the region below Jupiter's atmosphere.

Of the Galilean satellites, which has the oldest, most heavily cratered surface? A: Europa B: Io C: Callisto D: Titan E: Ganymede

In size, from largest to smallest, the correct order for the Galilean moons is: A: Callisto, Ganymede, Europa, Io. B: Ganymede, Callisto, Io, Europa. C: Io, Europa, Callisto, Ganymede. D: Europa, Ganymede, Io, Callisto. E: Ganymede, Callisto, Europa, Io.

Of the Galilean moons, the one with striking grooved terrain and icy tectonic features as well as older craters is: A: Europa. B: Ganymede. C: Callisto. D: Amalthea. E: Io.