The three common substances believed to have been important in planet formation are
A) water,carbon dioxide ice (dry ice),and iron.
B) solid,liquid,and gaseous hydrogen.
C) hydrogen,helium,and neon gases.
D) rocks,ices,and gas.

Question

Quizplus · Accepted Answer

Rocks, ices, and gas are the three common substances believed to have been important in planet formation. Rocks and ices formed the solid materials from which planets could form, while the gas provided the material for the atmospheres of these planets.

The Three Common Substances Believed to Have Been Important in Planet