A geophysicist is a scientist who studies the physical properties and processes of the Earth. They use techniques from physics, mathematics, and geology to understand phenomena such as earthquakes, volcanic activity, and the Earth's magnetic field. Their work often involves collecting and analyzing data from various sources, including satellites, seismographs, and geological surveys. Geophysicists play a crucial role in natural resource exploration, environmental protection, and understanding climate change. They may work in academia, government agencies, or private industry, collaborating with other scientists and engineers to solve complex problems related to the Earth's systems and resources.