The difference in composition between the giant planets and the terrestrial planets is most likely caused by the fact that
A) the giant planets are much larger.
B) only the terrestrial planets have iron cores.
C) the terrestrial planets are closer to the Sun.
D) the giant planets are made mostly of carbon.
E) only small differences in chemical composition existed in the solar nebula.

Question

Quizplus · Accepted Answer

The terrestrial planets are closer to the Sun, which means they formed in a region where it was too warm for volatile compounds like water, methane, and ammonia to condense. This led to them being composed mostly of rock and metal, unlike the giant planets which formed further out where it was cooler, allowing them to accumulate more gas and ices.

The Difference in Composition Between the Giant Planets and the Terrestrial