Geology is a SCIENCE that studies the Earth's physical structure and history. It involves the study of rocks, minerals, fossils, and other geological features. Geologists use a variety of techniques to understand the Earth's history, including mapping, radiometric dating, and seismic analysis. They also use laboratory experiments to study the properties of rocks and minerals. Geology is an important field of study for understanding the Earth's past and present, as well as predicting its future.