Which planet is known for having an iron core and high cliffs?

The planet known for having an iron core and high cliffs is Mercury. Mercury's internal structure is characterized by a large iron-rich core that makes up a significant portion of its volume, reflecting its high density compared to other planets. This composition suggests that Mercury underwent a massive collision in its early history, which likely stripped away much of its outer layers, leaving behind a dense metallic core.

Additionally, Mercury is also recognized for its geological features, including high cliffs known as "lobate scarps." These rugged cliffs are indicative of the planet's geological history and demonstrate that it has undergone significant contraction as it cooled. The presence of these high cliffs suggests that Mercury's surface has been shaped by various geological processes, contributing to its rugged terrain.

In contrast, while Earth and Mars also have iron cores, they do not feature the same prominent cliffs as seen on Mercury. Uranus, being a gas giant, has a vastly different internal structure and lacks the solid surface that would allow for noticeable geological formations like cliffs. Thus, Mercury stands out for its combination of an iron core and distinctive high cliffs.