Earth Science is a broad field of study that encompasses the physical, chemical, and biological processes that shape our planet. Geology (GEOL) is the study of the Earth's structure, composition, and history. Geography (GEOG) is the study of the Earth's surface features and how they interact with each other. Ecology (ECOL) is the study of the relationships between organisms and their environment. Together, these three disciplines form the basis of Earth Science, providing an understanding of the Earth's past, present, and future.