Chapter 13 neptune&uranus

In 1989, Neptune was found to have a huge storm named the: A: Great Dark Spot. B: Great Red Spot. C: Galileo Regio. D: Hellas Basin. E: South Tropical Disturbance.

A: Great Dark Spot.

The most abundant component of the atmospheres of Uranus and Neptune is: A: Hydrogen. B: Helium. C: Methane. D: Ammonia. E: Nitrogen.

A: Hydrogen.

In terms of axial tilt, which of the jovians shows us the largest inclination? A: Uranus B: Pluto C: Neptune D: Saturn E: Jupiter

A: Uranus

Neptune's moon Triton shows: A: little cratering, consistent with a young surface. B: extensive cratering, consistent with an old surface. C: little cratering, consistent with an old surface. D: little cratering, telling nothing about the age of its surface. E: extensive cratering, consistent with a young surface.

A: little cratering, consistent with a young surface.

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

A: their atmospheres contain methane, which absorbs red light.

The time between equinoxes on Uranus is about: A: 84 years. B: 42 years. C: 21 years. D: 7 hours. E: 8 hours.

B: 42 years.

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

C: Both pass directly through the cores of their planets, like all other fields.

In the atmospheres of the jovian planets, this component increases, systematically, with distance from the Sun. A: Hydrogen B: Helium C: Methane D: Ammonia E: Nitrogen

C: Methane

Although the atmospheres of Uranus and Neptune are very similar, the atmosphere of Neptune contains more: A: Hydrogen. B: Helium. C: Methane. D: Ammonia. E: Nitrogen.

C: Methane.

How many times has Neptune completed a revolution around the Sun since its discovery? A: about 100 B: about 1000 C: about 1 D: more than several thousand E: about 10

C: about 1

Unlike the other jovian planets, Uranus: A: has no ring system. B: has only a few satellites. C: has no internal energy source. D: rotates slowly. E: has a featureless atmosphere.

C: has no internal energy source.

In the atmospheres of the jovian planets, this component decreases, systematically, with distance from the Sun. A: Hydrogen B: Helium C: Methane D: Ammonia E: Nitrogen

D: Ammonia

Unlike the atmospheres of Jupiter and Saturn, Uranus and Neptune have almost no: A: Hydrogen. B: Helium C: Methane. D: Ammonia. E: Nitrogen.

D: Ammonia.

On which planet can the pole remain in darkness for 42 years, and then have 42 years of constant daylight? A: Pluto B: Jupiter C: Neptune D: Uranus E: Saturn

D: Uranus

Which jovian planet has no internal heat source? A: Jupiter B: Saturn C:Neptune D: Uranus E:None; they all have internal heat sources.

D: Uranus

The magnetic field tilts of which two bodies are the most unusual? A: Saturn and Venus B: Jupiter and Saturn C: Mercury and Earth D: Uranus and Neptune E: Mars and Saturn

D: Uranus and Neptune

The planet whose pole was facing the Sun when Voyager 2 approached in 1986 was: A: Jupiter. B: Saturn. C: Neptune. D: Uranus. E: Mars.

D: Uranus.

The solar system object most similar to Neptune is A: Earth. B: Jupiter. C: Saturn. D: Uranus.

D: Uranus.

A day at the north pole of Uranus lasts: A: about 7 hours. B: about 21 years. C: about 84 years. D: about 42 years. E: about 8 hours.

D: about 42 years.

Moons that show few craters probably A: have been shielded from impacts by their host planet. B: have had their smaller craters obliterated by larger impacts. C: are captured asteroids. D: have warm interiors.

D: have warm interiors.

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

D: less than 250 years ago.

On what basis did Herschel think he had found a comet? A: It was not a point of light like a star should appear. B: The object appeared as a small greenish disk in his telescope. C: It appeared to be moving slightly night by night. D: No star appeared in that position on his charts. E: All of the above are correct.

E: All of the above are correct.

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

E: It will provide the raw material for a future Neptunian ring.

In addition to Saturn's Titan, which other moon has a nitrogen atmosphere? A: Pluto's Charon B: Uranus' Titania C: Jupiter's Europa D: Jupiter's Ganymede E: Neptune's Triton

E: Neptune's Triton

Studying the magnetospheres of the jovians has allowed us to measure their: A: orbital radius. B: gravity. C: orbital period. D: ring system diameters. E: rotation rates.

E: rotation rates.

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

False

The axial tilts of Uranus and Neptune are similar. TrueFalse

False

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

False

Uranus' rotation axis is tipped over 98 degrees, so its magnetosphere is tipped over the same amount. TrueFalse

False

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

True

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

True

The visual appearance of Neptune is much bluer than Uranus. TrueFalse

True

Uranus and Neptune are very similar in size and mass. TrueFalse

True

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

True

William Herschel was the discoverer of Uranus. TrueFalse

True

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

true