© 2017 Pearson Education, Inc.

Question 1 As their distance from Jupiter increases, the four Galilean satellites show a consistent increase in density. increase in size. decrease in cratering. decrease in density. amount of cratering. Answer: d © 2017 Pearson Education, Inc.

Question 1 As their distance from Jupiter increases, the four Galilean satellites show a consistent increase in density. increase in size. decrease in cratering. decrease in density. amount of cratering. Explanation: Like a miniature version of our solar system, Jupiter’s four large moons show a decrease in density as distance increases. Io is most dense of the four; Callisto is least dense. © 2017 Pearson Education, Inc.

Question 2 The surface of which jovian moon most resembles the pack ice of the Arctic Ocean? Europa Io Amalthea Ganymede Callisto Explanation: Ice-filled surface cracks indicate an ocean may lie below. © 2017 Pearson Education, Inc.

Question 3 What is thought to cause Io’s volcanism?
Jupiter’s magnetosphere Jupiter’s rapid rotation Tidal stress from Jupiter and Europa Radioactive decay from its core Io’s large mass and tectonic activity Answer: c © 2017 Pearson Education, Inc.

Question 3 What is thought to cause Io’s volcanism?
Jupiter’s magnetosphere Jupiter’s rapid rotation Tidal stress from Jupiter and Europa Radioactive decay from its core Io’s large mass and tectonic activity Explanation: Io is constantly “squeezed” by its huge neighbor as well as by companion moons, heating its interior. © 2017 Pearson Education, Inc.

Question 4 How was the ring of Jupiter discovered?
By optical telescopic observers from Earth By Voyager I as it passed Jupiter By an occultation of a star By radar imaging using the Arecibo dish With the Hubble Space Telescope’s superior resolution Answer: b © 2017 Pearson Education, Inc.

Question 4 How was the ring of Jupiter discovered?
By optical telescopic observers from Earth By Voyager I as it passed Jupiter By an occultation of a star By radar imaging using the Arecibo dish With the Hubble Space Telescope’s superior resolution Explanation: Jupiter’s ring is composed of dark, dusty particles that were first seen when Voyager was past the planet, looking back toward the Sun. © 2017 Pearson Education, Inc.

Question 5 The Roche limit is defined as the critical
distance from a planet, inside of which a moon can be tidally destroyed. density that a moon can have and be solid. distance from a planet that a moon can experience synchronous rotation. mass a moon can have and still be classified as a moon. Answer: a © 2017 Pearson Education, Inc.

Question 5 The Roche limit is defined as the critical
distance from a planet, inside of which a moon can be tidally destroyed. density that a moon can have and be solid. distance from a planet that a moon can experience synchronous rotation. mass a moon can have and still be classified as a moon. Explanation: Saturn’s rings, as well as those of the other jovian planets, lie within its planet’s Roche limit. © 2017 Pearson Education, Inc.

Question 6 Shepherd satellites are defined as
satellites in the coma of a comet. moons that confine a narrow ring. a type of moon that orbits another moon. moons that share an orbit of another, larger moon. moons that orbit inside a system of rings. Answer: b © 2017 Pearson Education, Inc.

Question 6 Shepherd satellites are defined as
satellites in the coma of a comet. moons that confine a narrow ring. a type of moon that orbits another moon. moons that share an orbit of another, larger moon. moons that orbit inside a system of rings. © 2017 Pearson Education, Inc.

Question 7 Why are the rings of Saturn so bright?
They are made of frozen metallic hydrogen. They contain glassy beads expelled by volcanoes on Enceladus. They contain shiny bits of iron. Titan and other moons reflect an additional glow onto the rings. They are made of relatively new ice. Answer: e © 2017 Pearson Education, Inc.

Question 7 Why are the rings of Saturn so bright?
They are made of frozen metallic hydrogen. They contain glassy beads expelled by volcanoes on Enceladus. They contain shiny bits of iron. Titan and other moons reflect an additional glow onto the rings. They are made of relatively new ice. Explanation: Saturn’s rings are perhaps only 50 million years old, the result of a small moon coming within the planet’s Roche limit. © 2017 Pearson Education, Inc.

Question 8 Which moon in the solar system shows a dense atmosphere?
Our Moon Phobos Europa Titan Triton Answer: d © 2017 Pearson Education, Inc.

Question 8 Which moon in the solar system shows a dense atmosphere?
Our Moon Phobos Europa Titan Triton Explanation: The Huygens probe, deployed by the Cassini spacecraft in 2005, showed that Titan’s atmosphere has a complex organic chemistry. © 2017 Pearson Education, Inc.

Question 10 The rings of Neptune were confirmed by Voyager 2 in 1989.
appear both narrow and diffuse. all lie within Neptune’s Roche limit. often appear as clumpy ring arcs, rather than complete and symmetrical rings. All of these are correct. Answer: e © 2017 Pearson Education, Inc.

Question 10 The rings of Neptune were confirmed by Voyager 2 in 1989.
appear both narrow and diffuse. all lie within Neptune’s Roche limit. often appear as clumpy ring arcs, rather than complete and symmetrical rings. All of these are correct. © 2017 Pearson Education, Inc.

Question 11 Neptune’s moon Triton shows
a thick atmosphere similar to Titan. volcanic features similar to those on Io. cratering similar to that of Callisto. large cliffs similar to Miranda. All of the above are correct. Answer: b © 2017 Pearson Education, Inc.

Question 11 Neptune’s moon Triton shows
a thick atmosphere similar to Titan. volcanic features similar to those on Io. cratering similar to that of Callisto. large cliffs similar to Miranda. All of the above are correct. Explanation: Triton has a thin atmosphere, active geysers of nitrogen gas, large fissures, and frozen lakes of water ice. © 2017 Pearson Education, Inc.

Question 12 Many astronomers believe Pluto is perhaps best classified as a cold terrestrial planet. small jovian planet. large Kuiper belt object. wandering moon. captured comet. Answer: c © 2017 Pearson Education, Inc.

Question 12 Many astronomers believe Pluto is perhaps best classified as a cold terrestrial planet. small jovian planet. large Kuiper belt object. wandering moon. captured comet. Explanation: Several other large Kuiper belt objects have been discovered, including the largest known, called Eris. © 2017 Pearson Education, Inc.

Question 13 Which of these moons are most exciting to exobiologists?
Io and Enceladus Titan and Europa Titan and Triton Europa and Miranda Phobos and Deimos Answer: b © 2017 Pearson Education, Inc.

Question 13 Which of these moons are most exciting to exobiologists?
Io and Enceladus Titan and Europa Titan and Triton Europa and Miranda Phobos and Deimos Explanation: Europa has indications of liquid water beneath the ice. Titan shows evidence of channels under its dense atmosphere. © 2017 Pearson Education, Inc.

Question 14 Which of the following is true of Pluto?
There are many fewer craters than on Earth’s Moon. Tall, icy mountains are found here. Large, smooth plains are found on Pluto. Its moon is Charon. All of these are true. Answer: e © 2017 Pearson Education, Inc.

Question 14 Which of the following is true of Pluto?
There are many fewer craters than on Earth’s Moon. Tall, icy mountains are found here. Large, smooth plains are found on Pluto. Its moon is Charon. All of these are true. Explanation: New Horizons spacecraft traveled past the Pluto–Charon system in Images showed tall, icy mountains as well as the large plain shown here. © 2017 Pearson Education, Inc.

© 2017 Pearson Education, Inc.

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