A geophysicist is a scientist who studies the physical properties and processes of the Earth and other planets. This includes the study of the Earth's structure, composition, and dynamic processes such as plate tectonics, seismic activity, and volcanic eruptions. Geophysicists use a combination of physics, mathematics, and geology to analyze and interpret data from a variety of sources, including seismology, gravity, magnetism, and geodesy. Their work helps us better understand the natural forces that shape our planet and can inform decisions related to resource exploration, hazard mitigation, and environmental management.