4 PointsWhich moon has a thick atmosphere made mostly of nitrogen?
4 PointsWhich moon has a thick atmosphere made mostly of nitrogen?
Triton
Europa
Titan
Ganymede
Question 2
4 PointsWhat is the most important reason why an icy moon is more likely to be geologically active than a rocky moon of the same size?
Ice is affected by tidal forces to a greater extent than rock.
Ice has a lower melting point than rock.
Ice is less dense than rock.
Ice is less rigid than rock.
Ice contains more radioactive elements than rock.
Question 3
4 PointsWhat kinds of moons orbit the Jovian planet?
small, medium – size, and large moons
with volcanic activity
with geological activity
none of the above
Question 4
4 PointsWhat is the largest moon in the Solar system?
Titan (Moon´s Saturno)
Ganymede (Moon´s Jupiter)
Triton (Moon´s Neptuno)
Europa (Moon´s Jupiter)
Question 5
4 PointsWhen a comet passes near the Sun, part of it takes on the appearance of a large, bright ball from which the tail extends. This part is called ________.
the nucleus
the Oort core
the plasma tail
the coma
Question 6
4 PointsWhy do asteroids and comets differ in composition?
Asteroids formed inside the frost line, while comets formed outside.
Asteroids are much larger than comets.
Comets are much larger than asteroids.
Comets formed from the jovian nebula, while asteroids did not.
Asteroids and comets formed at different times.
Question 7
4 PointsWhere did comets that are now in the Kuiper belt originally form?
inside Jupiter’s orbit
between the orbits of Jupiter and Neptune
in the Oort cloud
in the asteroid belt
near the radius at which they orbit today
Question 8
4 PointsWhich of the jovian planets has/have rings?
Jupiter
Saturn
Uranus
Neptune
All of these
Question 9
4 PointsSuppose you could float in space just a few meters above Saturn’s rings. What would you see as you looked down on the rings?
a solid, shiny surface, looking much like a piece of a DVD but a lot bigger
countless icy particles, ranging in size from dust grains to large boulders
dozens of large “moonlets” made of metal and rock, each a few kilometers across
Nothing-up close; the rings would be so completely invisible that you’d have no way to know they are there. They can be seen only from a distance.
Question 10
4 PointsIn what way(s) has Pluto long been known to be different from the planets?
It is composed primarily of ices.
All of these
It has a highly eccentric orbit.
It is far smaller than the terrestrial planets.
Its orbit is more inclined to the ecliptic plane.
Question 11
4 PointsAccording to current evidence, Pluto is best explained as ________.
a terrestrial planet that is surprisingly far from the Sun
a large member of the Kuiper belt
a very small jovian planet
an escaped moon of Jupiter or Saturn
Question 12
4 PointsWill Pluto eventually collide with Neptune?
No, because Pluto’s orbit is completely inside Neptune’s orbit.
No, because Pluto’s orbit never comes anywhere close to Neptune’s orbit.
Yes.
No, because the two planets have an orbital resonance that prevents them from colliding.
No, because Pluto’s orbit is completely outside Neptune’s orbit.
Question 13
4 PointsHow do the jovian planet interiors differ?
The core mass decreases with the mass of the planet.
The composition changes from mostly hydrogen in Jupiter and Saturn to mostly helium in Uranus and Neptune.
All have about the same amount of hydrogen and helium but the proportion of rocks is greater in those planets closer to the Sun.
All have cores of about the same mass but differ in the amount of surrounding hydrogen and helium accumulated.
Question 14
4 PointsHow do the size and mass of Jupiter’s core compare to the size and mass of Earth?
Jupiter doesn’t have a core—it is made entirely from hydrogen and helium.
It is about the same size but is 10 times more massive.
It is the same size and mass.
It is about 10 times larger in size and the same mass.
It is about 10 times larger both in size and mass.
Question 15
4 PointsWhy is Neptune denser than Saturn?
Because it has less H/He, proportionately. It has larger proportions of hydrogen compounds, rock, and metal.
Because it has a greater proportion of hydrogen than Saturn.
Its hydrogen is molecular, whereas Saturn’s hydrogen is atomic.
Because the extra mass of Neptune compresses its interior to a greater extent than that of Saturn.
Question 16
4 PointsAccording to our theory of solar system formation, why did Uranus and Neptune end up to be much less massive than Jupiter and Saturn?
The size differences are thought to be a random coincidence.
The Jovian planets farther from the Sun took longer to form and captured less hydrogen and helium gas and there was less time to pull in gas before the solar wind cleared the nebula.
Ices were able to condense at the distance of Jupiter and Saturn, but only rock and metal could condense at the distances of Uranus and Neptune.
The colder gas in the outer regions of the solar nebula had less gravity and therefore could not gather up into such large balls as it could closer in.
Question 17
4 PointsWhich of the following photos shows the planet Neptune?
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