Compared to Jupiter and Saturn, Uranus and Neptune

Question

BlackTom AI · Accepted Answer

The question asks to compare Uranus and Neptune with Jupiter and Saturn across several planetary properties.
Option 1: 'rotate faster' — In reality, the rotation rates of Jupiter and Saturn are roughly 10 hours, while Uranus and Neptune have rotation periods near 17 hours. So saying Uranus/Neptune rotate faster is incorrect.
Option 2: 'have stronger magnetic fields' — All four planets have magnetic fields, but Jupiter and Saturn have stronger, more powerful fields due to their larger internal dynamos. The magnetic fields of Uranus and Neptune are unusual: they're tilted and offset, and not stronger overall. This makes this choice misleading and not correct.
Option 3: 'have more hydrogen and less rock' — Jupiter and Saturn are gas giants with large hydrogen/helium envelopes and relatively smaller rocky cores in proportion. Uranus and Neptune are ice giants with a larger fraction of volatile ices and comparatively less hydrogen/helium by mass. Therefore this statement is inaccurate for Uranus/Neptune relative to the gas giants.
Option 4: 'are less dense' — Density varies among these planets. Jupiter is less dense than Neptune but more than Uranus, and Saturn is the least dense of the four. Because density comparisons between them are not uniformly 'less dense' for Uranus/Neptune, this claim is not consistently true and is therefore incorrect.
Option 5: 'have more ices' — This matches the standard description: Uranus and Neptune are often labeled ice giants because they contain a larger proportion of volatile ices (water, ammonia, methane) in their interiors compared to Jupiter and Saturn, which are dominated by hydrogen/helium gas. This statement is correct.
Thus, each of the other options either misstates the rotation, magnetic field strength, composition, or density in a way that conflicts with established planetary characteristics, whereas having more ices accurately reflects Uranus/Neptune as ice giants relative to Jupiter/Saturn.

ASTRON 2140 AU2025 (23428) Quiz 4 - 2025 Nov 21

Compared to Jupiter and Saturn, Uranus and Neptune

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ASTRON 2140 AU2025 (23428) Quiz 4 - 2025 Nov 21

Compared to Jupiter and Saturn, Uranus and Neptune

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类似问题

Moons close to Jupiter have relatively more _____, while those farther away have relatively more _____.

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The most abundant material in the Jovian planets is

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Why is Neptune denser than Saturn?

Overall, Jupiter's composition is more like that of

Compared to other rocky planets, the Moon is deficient in which of the following elements?

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Moons close to Jupiter have relatively more _, while those farther away have relatively more _.