The compositions of Uranus and Neptune differ primarily from those of Jupiter and Saturn in that the outer two planets contain more:

Question

Quizplus · Accepted Answer

Uranus and Neptune are often referred to as "ice giants" because they contain significant amounts of water ice in addition to hydrogen and helium. While Jupiter and Saturn also contain water ice, it is not as abundant in these planets as in Uranus and Neptune. Additionally, the question specifically mentions that the difference is "primarily" in the outer two planets, which are Uranus and Neptune.

The Compositions of Uranus and Neptune Differ Primarily from Those