Geology is the scientific discipline concerned with the Earth's materials, structure, history, and the processes by which these elements change. It investigates the composition of the planet's crust, mantle, and core, analyzing the physical processes such as the rock cycle, which describes the continuous transformation of minerals from igneous to sedimentary to metamorphic forms. Key areas of study include the dynamics of plate tectonics, which explains large-scale crustal movements, the chemistry and formation of minerals, and the temporal evolution of subsurface features. The field utilizes methods ranging from analyzing fossil records and radiometric dating to studying seismic activity to reconstruct Earth's deep past and current physical state.