П_Пашкевич, я когда нагуглил образец Earth science textbook, там примерно такое содержание:
What is Earth Science?
Studying Earth's Surface
Earth's Minerals
Rocks
Earth's Energy
Plate Tectonics
Earthquakes
Volcanoes
Weathering and Formation of Soil
Erosion and Deposition
Evidence About Earth's Past
Earth's History
Earth's Fresh Water
Earth's Oceans
Earth's Atmosphere
Weather
Climate
Ecosystems and Human Populations
Human Actions and the Land
Human Actions and Earth's Resources
Human Actions and Earth's Waters
Human Actions and the Atmosphere
Observing and Exploring Space
Earth, Moon, and Sun
The Solar System
Stars, Galaxies, and the Universe

И таки в фанфике упоминается геология как подраздел этой earth sci.