Here's why:

* Geology is the study of the Earth, including its composition, structure, and history. This encompasses all the processes that have shaped our planet over millions of years.

* Geologists investigate a wide range of Earth-changing processes, including:

* Plate tectonics: The movement of the Earth's tectonic plates, causing earthquakes, volcanic eruptions, and mountain formation.

* Erosion: The wearing away of rocks and soil by wind, water, or ice.

* Weathering: The breaking down of rocks by physical or chemical processes.

* Sedimentation: The deposition of sediments, which eventually form sedimentary rocks.

* Climate change: The long-term shifts in Earth's climate, influenced by various factors like volcanic activity and solar radiation.

While other disciplines like meteorology (study of weather), oceanography (study of oceans), and climatology (study of climate) also deal with Earth-changing processes, geology provides the overarching framework for understanding how these processes interact and shape our planet.