Which one of these statements about all four of the giant planets is true?
A) The giant planets are almost entirely made up of hydrogen and helium; only about 1 percent of the planets' mass is made up of heavier elements.
B) The giant planets are thought to have substantial rocky cores.
C) Liquid metallic hydrogen makes up a large part of the interiors of the giant planets.
D) The spin axes of the giant planets are all approximately perpendicular to their orbital planes.

Question

Quizplus · Accepted Answer

The giant planets (Jupiter, Saturn, Uranus, and Neptune) are thought to have substantial rocky cores beneath their thick atmospheres of hydrogen and helium. This is a key feature that distinguishes them from terrestrial planets and is consistent with current models of their formation and internal structure.

Which One of These Statements About All Four of the Giant