Deck 13: Uranus and Neptune: The Outer Worlds of the Solar System

Question 1

The nitrogen geysers of Triton carry carbon grit into the winds of its atmosphere.

Answer 1

True

Question 2

Uranus's rotation axis is tipped over 98 degrees, so its magnetosphere is tipped over the sameamount.

Answer 2

False

Question 3

We see differential rotation at Uranus and Neptune such that the equator is moving slowerthan higher latitudes.

Answer 3

True

Question 4

Uranus was discovered by accident, and mistaken for a comet at first.

Question 5

Changes in the predicted motion of Uranus led to the search for an eighth planet.

Question 6

Images that show bands on Uranus can only be obtained using space-based telescopes.

Question 7

Both have strangely tilted magnetic fields, but that of Uranus is even farther off the rotationalaxis than that of Neptune.

Question 8

The cantaloupe-like terrain of Triton is tectonic in origin, much like the grooved terrain ofGanymede and Enceladus.

Question 9

The visual appearance of Neptune is much bluer than Uranus.

Question 10

Uranus's moon Ariel shows considerable surface activity, a surprise considering its smallsize.

Question 11

Triton shows similar cratering to the Lunar highlands, which suggests that it too is an oldsurface.

Question 12

William Herschel was the discoverer of Uranus.

Question 13

From Voyager 2, Neptune's clouds appeared much more active than did Uranus's, surprisingsince Neptune is smaller, colder, and farther from the Sun.

Question 14

The Great Dark Spot on Neptune is probably as stable as Jupiter's famed Great Red Spot.

Question 15

The axial tilts of Uranus and Neptune are similar.

Question 16

Neptune has a highly tilted rotation axis, much like Uranus, and very unlike Saturn's.

Question 17

Neptune has a larger fraction of methane in its atmosphere than Uranus.

Question 18

Neptune has completed dozens of orbits since its discovery.

Question 19

Uranus and Neptune are very similar in size and mass.

Question 20

Because the poles of Uranus spend 42 years in darkness, the temperatures between thenorthern and southern hemispheres of Uranus differ by as much as hundreds of Kelvins,depending on where Uranus is in its orbit.

Question 21

How many times has Neptune completed a revolution around the Sun since its discovery?

A)about 1
B)about 10
C)about 100
D)about 1000
E)more than several thousand

Question 22

The only spacecraft to have visited Uranus and Neptune was:

A)Pioneer 10.
B)Pioneer 11.
C)Voyager 1.
D)Voyager 2.
E)Cassini.

Question 23

When initially discovered by Voyager 2, Neptune's rings appeared as ring arcs, and are moreclumpy and less regular than most other rings.

Question 24

The planet whose pole was facing the Sun when Voyager 2 approached in 1986 was:

A)Jupiter.
B)Saturn.
C)Uranus.
D)Neptune.
E)Mars.

Question 25

On what basis did Herschel think he had found a comet?

A)The object appeared as a small greenish disk in his telescope.
B)It appeared to be moving slightly night by night.
C)No star appeared in that position on his charts.
D)It was not a point of light, like a star should appear.
E)All of the above are correct.

Question 26

Small deviations in a planet's orbital motion:

A)show we don't fully understand gravitational forces yet.
B)indicate the presence of an extensive atmosphere.
C)indicate the presence of a powerful magnetic field.
D)imply the nearby presence of a massive body.
E)show the planet's orbit isn't stable.

Question 27

The planet Uranus is:

A)easily visible with the naked eye.
B)barely visible with the naked eye.
C)only visible with a small telescope or binoculars.
D)only visible with a large, high quality telescope.
E)only visible with a space-based telescope.

Question 28

Our most detailed knowledge of Uranus and Neptune comes from:

A)spacecraft exploration.
B)the Hubble Space Telescope.
C)ground-based visual telescopes.
D)ground-based radio telescopes.
E)manned missions.

Question 29

The clearest images of Uranus shown in the text have been obtained using:

A)the Hubble Space Telescope.
B)infrared ground-based telescopes at the Keck Observatory.
C)the Pioneer Spacecraft.
D)the Cassini Spacecraft.
E)visible light ground-based telescopes at the European Southern Observatory.

Question 30

Adams and Leverrier predicted the position of Neptune, based on its perturbations of:

A)Jupiter.
B)the Sun.
C)Saturn's rings.
D)Uranus.
E)Triton.

Question 31

On which planet can the pole remain in darkness for 42 years, and then have 42 years ofconstant daylight?

A)Jupiter
B)Saturn
C)Uranus
D)Neptune
E)Pluto

Question 32

In terms of axial tilt, which of the jovians shows us the largest inclination?

A)Jupiter
B)Saturn
C)Uranus
D)Neptune
E)Pluto

Question 33

Uranus was discovered:

A)by Galileo.
B)thousands of years ago.
C)with a radio telescope.
D)after examining perturbations in Neptune's orbit.
E)less than 250 years ago.

Question 34

William Herschel thought he had found a comet when he spotted the green disk of:

A)Triton.
B)Uranus.
C)Neptune.
D)Titania.
E)Oberon.

Question 35

The rings of Uranus were discovered from Earth when the planet occulted a star.

Question 36

As with Saturn's F ring, shepherd moons play a major role in the structure of the thin narrowrings around Uranus.

Question 37

On Bode's advice, Herschel named his newly discovered planet after:

A)the Greek god of the sea.
B)the king of England.
C)his benefactor.
D)the Roman god of the underworld.
E)the father of Saturn.

Question 38

About 50 years after Uranus was discovered:

A)its rings were discovered.
B)the retrograde motion of its orbit was observed.
C)its orbit was too far off of its predicted path to be explained by observational errors.
D)it was discovered that it had more natural satellites than any other planet.
E)it was discovered that its atmosphere was featureless.

Question 39

Which three played a role in the finding of Neptune?

A)Herschel, Hubble, and Einstein
B)Newton, Einstein, and Tombaugh
C)Adams, Leverrier, and Galle
D)Bode, Herschel, and Fraunhofer
E)Shapley, Hubble, and Whipple

Question 40

In 1846, Johann Galle found Neptune:

A)a few degrees from where it was predicted to be.
B)after many years of searching for it.
C)exactly where he predicted it would be.
D)using just a pair of binoculars.
E)using grossly inaccurate star charts.

Question 41

Although the atmospheres of Uranus and Neptune are very similar, the atmosphere ofNeptune contains more:

A)hydrogen.
B)helium.
C)methane.
D)ammonia.
E)nitrogen.

Question 42

Uranus's large axial tilt is thought to be the result of:

A)the same orbital irregularities that led to the discovery of Neptune.
B)a single collision or impact event early in the solar system's history.
C)the captures of one or more of Uranus's moons.
D)giant planet migration.
E)multiple catastrophic events, such as glancing collisions.

Question 43

Compared with the other jovian planets, Neptune is:

A)much larger and featureless.
B)small with features similar to Jupiter.
C)small and featureless.
D)much larger with features similar to Saturn.
E)average, but featureless.

Question 44

A day at the north pole of Uranus lasts:

A)about 7 hours.
B)about 8 hours.
C)about 21 years.
D)about 42 years.
E)about 84 years.

Question 45

The time between equinoxes on Uranus is about:

A)7 hours.
B)8 hours.
C)21 years.
D)42 years.
E)84 years.

Question 46

Neptune and Uranus have a bluish tint because:

A)at their distances, the Sun appears blue, the red absorbed by dust in the ecliptic.
B)they are far away and distance makes objects appear bluish.
C)their atmospheres contain methane, which absorbs red light.
D)their atmospheres contain hydrogen and helium.
E)ammonia ice reflects blue light better than any other color.

Question 47

The rotation period of Uranus was measured through:

A)observations of the motions of its satellites.
B)observations of the features on its cloud surface.
C)observations of radio signals associated with its magnetosphere.
D)observations of its motion around the Sun.
E)observations of Neptune's motion around the Sun.

Question 48

Unlike the atmospheres of Jupiter and Saturn, Uranus and Neptune have almost no:

A)hydrogen.
B)helium.
C)methane.
D)ammonia.
E)nitrogen.

Question 49

Studying the magnetospheres of the jovians has allowed us to measure their:

A)rotation rates.
B)orbital period.
C)orbital radius.
D)gravity.
E)ring system diameters.

Question 50

In 1989, Neptune was found to have a huge storm named the:

A)South Tropical Disturbance.
B)Great Red Spot.
C)Great Dark Spot.
D)Hellas Basin.
E)Galileo Regio.

Question 51

The unique feature of Neptune is:

A)that its rotational axis is tilted 98 degrees.
B)that it rotates in a retrograde sense.
C)that its atmosphere rotates more slowly than its interior.
D)that it has no ring system.
E)its banded cloud surface.

Question 52

At the equator during the equinoxes on Uranus a day lasts:

A)7 hours.
B)8 hours.
C)21 years.
D)42 years.
E)84 years.

Question 53

The masses of Neptune and Uranus were first determined by:

A)observations of their motions around the Sun.
B)observations of their magnetic fields.
C)their densities divided by their volumes.
D)observations of the motions of their satellites.
E)their compositions.

Question 54

Which of these is true about the seasons of Uranus?

A)With a tilt of 29 degrees, they are not that different from our solstices and equinoxes.
B)Its strange tilt produces extreme seasonal variations, especially at the poles.
C)At the Uranian equator, the Sun would pass overhead every sixteen hours.
D)At the Uranian pole the Sun sets every 16 hours during the summer and winter.
E)There are no seasons at the poles.

Question 55

Adams and Leverrier both predicted the position of Neptune, based on its effects on:

A)the Sun.
B)Jupiter.
C)Saturn.
D)Uranus.
E)Pluto.

Question 56

Uranus's atmosphere:

A)rotates faster at the poles than the equator.
B)rotates faster at the equator than the poles.
C)does not exhibit differential rotation.
D)rotates at the same rate as the magnetic field.
E)does not rotate.

Question 57

In the atmospheres of the jovian planets, this component decreases, systematically, withdistance from the Sun.

A)hydrogen
B)helium
C)methane
D)ammonia
E)nitrogen

Question 58

The most abundant component of the atmospheres of Uranus and Neptune is:

A)hydrogen.
B)helium.
C)methane.
D)ammonia.
E)nitrogen.

Question 59

Which of the following is true about the seasons on Uranus?

A)The seasons on Uranus are not unlike those on Earth or Mars.
B)The Uranian rotation axis produces some extreme seasonal effects.
C)Like Jupiter, Uranus has little tilt, with its equator always facing the Sun.
D)From the Uranian equator, the Sun would remain stationary all the time.
E)Uranus's weather will become less turbulent as equinox approaches in 2049.

Question 60

Uranus and Neptune appear bluish in color because:

A)methane gas in their atmospheres absorbs red light well.
B)ammonia absorbs blue light well.
C)hydrogen and helium are both blue in large concentrations.
D)dust motes in their atmospheres scatter blue well, just as in our own blue sky.
E)from their distance, the Sun would appear hotter and bluer than from Earth.

Question 61

In addition to Saturn's Titan, which other moon has a nitrogen atmosphere?

A)Jupiter's Europa
B)Uranus's Titania
C)Neptune's Triton
D)Jupiter's Ganymede
E)Pluto's Charon

Question 62

In the atmospheres of the jovian planets, this component increases, systematically, withdistance from the Sun.

A)hydrogen
B)helium
C)methane
D)ammonia
E)nitrogen

Question 63

Which planet had the Great Dark Spot in 1989, but had lost it by 1995?

A)Jupiter
B)Saturn
C)Uranus
D)Neptune
E)Mars

Question 64

Which statement about the magnetic fields of Uranus and Neptune is FALSE?

A)Neither fits the Dynamo model very well.
B)Uranus's field is tilted 60 degrees off its already tilted rotational axis.
C)Neptune's field is tilted 47 degrees to its more conventional rotational axis.
D)Both pass directly through the cores of their planets, like all other fields.
E)Both may have ammonia water replacing the liquid metallic hydrogen.

Question 65

What is erupting out of the geysers on Triton?

A)liquid water with basalt
B)liquid methane with a dark hydrocarbon slush
C)liquid nitrogen with carbon grit
D)liquid carbon dioxide with graphite
E)liquid hydrogen with dark helium ash

Question 66

Bands in Uranus's atmosphere, similar to those seen on the other jovian planets,

A)form due to Uranus's rapid rotation.
B)do not exist due to Uranus's large axial tilt.
C)do not exist because Uranus is too small.
D)are formed by interactions with Uranus's moons and rings.
E)are driven by Uranus's internal energy source.

Question 67

Unlike the other jovian planets, Uranus:

A)has no ring system.
B)has only a few satellites.
C)has a featureless atmosphere.
D)has no internal energy source.
E)rotates slowly.

Question 68

The observed temperature difference between the northern and southern hemispheres ofUranus:

A)is dozens of Kelvins.
B)is hundreds of Kelvins.
C)varies greatly.
D)is about 10 Kelvin.

Question 69

In strength, the magnetic fields of Uranus and Neptune are:

A)very different, with flopped over Uranus having no field, and Neptune a strong one.
B)similar, with both about 100 times stronger than our own.
C)even stronger than that of Jupiter.
D)perfect fits for the Dynamo theory.
E)like Jupiter and Saturn, due to mantles of liquid metallic hydrogen.

Question 70

The wind speeds on Uranus are most similar to wind speeds on:

A)Mercury.
B)Earth.
C)Jupiter.
D)Saturn.
E)Neptune.

Question 71

Which jovian planet has no internal heat source?

A)Jupiter
B)Saturn
C)Uranus
D)Neptune
E)None; they all have internal heat sources.

Question 72

The magnetic field tilts of which two bodies are the most unusual?

A)Mercury and Earth
B)Jupiter and Saturn
C)Uranus and Neptune
D)Saturn and Venus
E)Mars and Saturn

Question 73

The wind speeds on Neptune are most similar to wind speeds on:

A)Mercury.
B)Earth.
C)Jupiter.
D)Saturn.
E)Uranus.

Question 74

Neptune's moon Triton shows:

A)little cratering, consistent with a young surface.
B)extensive cratering, consistent with a young surface.
C)little cratering, consistent with an old surface.
D)extensive cratering, consistent with an old surface.
E)little cratering, telling nothing about the age of its surface.

Question 75

Radiation darkening is a likely explanation of:

A)why Uranus's moons are less reflective than Saturn's.
B)the lack of distinct, visible bands in Uranus's atmosphere.
C)Uranus's extreme axial tilt.
D)the tilt of Uranus's magnetic field relative to the rotation axis.
E)why Uranus's rings are so much fainter than Saturn's.

Question 76

What is the prediction for the future of Triton?

A)It will provide the raw material for a future Neptunian ring.
B)It will develop active volcanoes as Neptune's tidal stresses become greater.
C)It will crash into Nereid when the smaller moon comes too close.
D)Its orbit, while retrograde, is very stable and will not change.
E)Its retrograde orbit will throw it back out into the Kuiper Belt again, with Pluto.

Question 77

The rings of Uranus and Neptune are found:

A)by the Hubble Space Telescope.
B)above their equators.
C)in the ecliptic plane.
D)outside the Roche limit.
E)all of the above.

Question 78

Hubble Space Telescope photos have shown us:

A)Uranus weather has produced more prominent patterns as equinox approaches.
B)the Great Dark Spot of Neptune vanished in 1995.
C)the rings of Uranus show up better in infrared than in visible light.
D)Neptune still has more activity than Uranus, despite its distance from the Sun.
E)All of the above are correct.

Question 79

Which of the Uranian moons displays the widest range of surface terrains, suggesting somecatastrophic disruption?

A)Puck
B)Umbriel
C)Oberon
D)Miranda
E)Ariel

Question 80

Orange-red spots seen on Uranus are due to:

A)high altitude clouds with sulfur compounds.
B)low altitude clouds with compounds.
C)high altitude water clouds.
D)low altitude water clouds.
E)mid altitude methane clouds.