Here's a breakdown:

* Geology is the scientific study of the Earth, including its composition, structure, physical processes, and history.

* Petrology is the specific branch of geology that focuses on the study of rocks.

* Soil Science is a separate discipline that focuses on the study of soil, its formation, properties, and management.

While soil is often studied in geology, soil science provides a more in-depth understanding of its composition, fertility, and role in ecosystems.