The Oort Cloud is primarily made up of rocky bodies that have been ejected from the inner solar system during its formation.

The statement is false. The Oort Cloud is a distant spherical shell of icy bodies, mainly comets, that formed in the outer reaches of the solar system, not from rocky material ejected from the inner planets. It is thought to have been populated by objects that were scattered outward by the giant planets, leaving them far from the Sun. For example, a comet that we see entering the inner solar system today likely originated in the Oort Cloud, where it has remained in a cold, icy state for billions of years. Thus, the Oort Cloud consists of icy, not rocky, bodies.