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Europa .NATS - Chapter 9 b
Terms in this set (24)
Which of the following is the most convincing observation that suggests that like Europa, Ganymede may also have a subsurface ocean?
in addition to its internal magnetic field, Ganymede has a magnetic field induced by Jupiter which is consistent with a salty ocean beneath its crust
The largest Jovian moon Ganymede and Titan are
larger than Mercury but smaller than the Earth
Saturn's icy moon Enceladus
has fountains of ice particles and water vapor spraying out from its surface
What is the origin of nitrogen in Titan's atmosphere?
breakdown of ammonia (NH3) by ultraviolet light form the Sun
Which Galilean moons of Jupiter show evidence for subsurface oceans of water beneath their icy crusts?
Europa, Ganymede, and Callisto
Life beneath the surface of Europa would most likely obtain energy from
Even though Jupiter's moon Lo is similar in size to geologically dead Moon, it is more geologically active than the earth. How can this be?
Lo is tidally heated to its elliptical orbit, which causes large tidal forces exerted by Jupiter to constantly change, flexing and distorting its interior
Titan is roughly the same size as Mercury, yet titan has an atmosphere while Mercury does not. How can this be?
Even though Titan's gravity is weak, it is much colder, allowing molecules to be trapped in its atmosphere
Which of the following has the Cassini orbiter observed on the surface of Saturn's moon Titan?
lakes of hydrocarbons in the north polar regions
During its descent into Titan's atmosphere, the Huygens probe found
no sign of flowing or pooled liquids currently on the surface although channels carved in the past by fluids were seen
Neptune's moon Triton
orbits in the opposite direction to Neptune's rotation
Which feature seen on Saturn's moon lapetus suggests that its interior must have been warm at some time in the past?
the presence of a steep ridge running along its equator
The fact that the strength of gravity decreases with distance means the force of gravity exerted by one object on another (eg the Erth and Moon) is greater on the near side than the far side. This effect is commonly referred to as a
Triton's source of internal heat is mostly associated with
tidal heat left over from it being captured into orbit around Neptune
The lack of large impact craters on the surface of Europa is consistent with
a subsurface ocean of water because large impacts will break the thin crust causing water and slushy ice below to flood out and resurface the crust
Jovian moons are typically made of
ice and rock
Compared to the moons of Jupiter, the moons of Saturn, Uranus, and Neptune
contain not only water ice but also methane and other ices
Life in the subsurface ocean of Europa will most likely consist of
simple single celled organisms
In addition to being the second largest moon in the solar system, Saturn's moon Titan, is
the only moon to have its own atmosphere
In addition to being the largest moon in the solar system, Ganymede, the Galilean moon of Jupiter, is
the only moon to have its own internal magnetic field
Lo has an elliptical orbit because
of orbital resonances with Europa and Ganymede
Current models suggest that if Europa does indeed have a subsurface ocean, it
could contain roughly twice as much water as all of Earth's oceans combined
The fact that many of the larger Jovian moons orbit nearly in the equatorial plane of their host world, moving in the same direction as their planet's spin, suggest that they
formed from a rotating disk of gas and dust like a miniature solar system
How is Titan, the moon of Saturn, similar to the Earth?
like the Earth, Titan has an atmosphere made mostly of molecular nitrogen
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