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What are Titan's lakes made of?

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Ethane (75%), methan...

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What evidence suggests that Enceladus has ongoing geological activity?


A) Voyager 2 photographed liquid nitrogen geysers 10 kilometers tall.
B) Lack of impact craters on much of its surface, evidence of ice flows from possible volcanicactivity, and geysers that supply material for the E-ring.
C) Voyager 1 showed sulfur eruptions all over its pizza-pie colored surface.
D) Enceladus is located within Saturn's Roche limit, and ready to blow up.
E) Enceladus undergoes severe tidal stresses from its resonance with Titan.

F) A) and E)
G) A) and B)

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Why are Saturn's rings so noticeable?


A) They are made of metallic hydrogen.
B) They are made of lots of fresh, bright icy particles from a recent breakup.
C) The particles in the rings are highly polished from numerous collisions with other particles.
D) They are made of nitrogen frost, like the bright surface of Triton.
E) Saturn is so bright, the rings reflect a lot of light from both Saturn and the Sun.

F) C) and D)
G) A) and B)

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Why was it thought that Titan may have oceans of methane?


A) Titan's atmosphere contains traces of methane. Similarly, Earth's atmosphere contains tracesof water vapor. So, scientists thought Titan should have methane oceans.
B) The atmospheric pressure at Titan's surface and its surface temperature are such that methaneshould be liquid on Titan's surface.
C) The abundance of hydrocarbons in the atmosphere of Titan led scientists to believe that Titanhad an abundance of methane on its surface.
D) Titan's atmosphere is like Earth's (mostly nitrogen) , but its temperature is too low for water tobe in the liquid phase. The only other possible liquid was methane.
E) Since Saturn has methane ice in its atmosphere, methane should be abundant in this region ofthe solar system. The sheer abundance of methane in the region led scientists to hypothesizemethane oceans on Titan.

F) C) and E)
G) A) and E)

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Which of Saturn's medium moons has ongoing geological activity?


A) Titan
B) Rhea
C) Tethys
D) Enceladus
E) None; only large moons have geological activity.

F) B) and E)
G) A) and B)

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Contrast the probes dispatched by Galileo and Cassini in destinations.

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Galileo's probe fell into the ...

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Telesto and Calypso share an orbit with ________.

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Saturn is noticeably oblate because:


A) it has strong magnetic fields that deform its shape.
B) its powerful gravity acts stronger on the closer poles than the distant equator.
C) it is a fluid body that is spinning rapidly.
D) it is tidally distorted by the pulls for its satellite system.
E) All of the above are correct.

F) D) and E)
G) B) and E)

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Saturn's storms are most analogous to:


A) hurricanes on Earth.
B) sunspots.
C) Jupiter's Great Red Spot.
D) thunderstorms on Earth.

E) A) and B)
F) All of the above

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Helium is more abundant at Saturn than at Jupiter.

A) True
B) False

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What are Saturn's rings?


A) a great disk of liquid helium
B) large rocky boulders moving in orbit around Saturn
C) a glowing, flat magnetospheric auroral display
D) a solid thin disk of material encircling Saturn
E) small icy particles moving in orbit around Saturn

F) A) and E)
G) A) and B)

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What makes Mimas a distinct moon?


A) It suffered a huge meteorite impact that must have nearly shattered it.
B) It helps maintain a wide apparent gap in Saturn's rings, known as Encke's Division.
C) It has a rich atmosphere that may resemble that of the early Earth.
D) It is the largest of Saturn's moons.
E) The leading hemisphere is very dark, while the back side is bright ice.

F) C) and D)
G) A) and B)

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Most of the moons of Saturn have rocky, cratered surfaces, like Deimos and Phobos.

A) True
B) False

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Compared to Jupiter, the motions observed in Saturn's atmosphere are:


A) faster with fewer zone-belt alternations.
B) slower with fewer zone-belt alternations.
C) faster with more zone-belt alternations.
D) slower with more zone-belt alterations.
E) nearly identical.

F) A) and D)
G) A) and E)

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Saturn is less dense than water.

A) True
B) False

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A moon that goes inside the Roche Limit will:


A) get heated by the strong magnetic fields.
B) collide with a major satellite.
C) escape its planet's gravity.
D) be torn apart by the planet's tidal forces.
E) become a planet.

F) A) and E)
G) B) and D)

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Describe Enceladus's jets, and how do they affect Enceladus's appearance?

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Enceladus has jets of water and organic ...

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Saturn has a hexagonal ________ near its north pole.

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jet stream...

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Shepherd satellites are defined as:


A) satellites in the coma of a comet.
B) moons that confine a narrow ring.
C) a type of moon that orbits another moon.
D) moons that follow the exact orbit of another, larger, moon.
E) moons that orbit inside the system of rings.

F) A) and E)
G) C) and D)

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What is the space probe that is currently orbiting Saturn and is responsible for numerousdiscoveries of storms and weather patterns in Saturn's atmosphere called?


A) Galileo
B) Encke
C) New Horizons
D) Cassini
E) Messenger

F) A) and E)
G) A) and D)

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