Geology is the study of the Earth, its composition, structure, and history. It is a science that focuses on the physical and chemical processes that shape the planet, as well as the organisms that inhabit it. Geologists use a variety of tools and techniques to study the Earth, such as mapping, sampling, and analyzing rocks and minerals. They also use satellite imagery and other remote sensing technologies to gain insight into the Earth's surface and subsurface features. Geology is an important field of study for understanding the Earth's past and present, and for predicting its future.