Here's why:

* Focus on Earth's Atmosphere: Meteorology specifically studies the Earth's atmosphere, its composition, weather patterns, and climate.

* Interdisciplinary Nature: It draws upon principles from physics (for atmospheric dynamics), chemistry (for atmospheric composition), and mathematics (for modeling and forecasting).

* Connection to Other Earth Sciences: Meteorology is closely related to other Earth sciences like climatology, oceanography, and geology.

While it utilizes concepts from other scientific fields, meteorology's primary focus on Earth's atmosphere firmly places it within the realm of Earth science.