Uranus and Neptune appear to be smaller versions of Jupiter and Saturn, but they differ significantly from these planets, in that:
A)they show much more structure and activity on their "surfaces."
B)their masses are larger than those of Jupiter and Saturn, even though they are smaller planets.
C)their average densities are greater; hence their internal structure and constituents must be different.
D)their rotation periods are much shorter, a few hours compared to Jupiter and Saturn's periods of a few days.

Question

Quizplus · Accepted Answer

Uranus and Neptune have greater average densities than Jupiter and Saturn, suggesting differences in their internal structures and constituents. Despite being smaller in size, their masses are not larger than Jupiter and Saturn's. They do not have shorter rotation periods; in fact, they rotate much slower than Jupiter and Saturn. While they may have more visible structure and activity on their surfaces, this is not a significant difference from Jupiter and Saturn.

Uranus and Neptune Appear to Be Smaller Versions of Jupiter