Geophysics is the science that deals with how interactions between matter and energy — physics — affect physical properties and processes on, in, and around the planet.
Geophysics is an earth science that combines elements of geology and physics. It involves understanding and analyzing many different geologic phenomena, such as Earth's magnetic field and the temperature, fluidity, and composition of Earth's layers. Geophysicists use instruments to measure things like sound waves, gravity, and magnetism. They may use seismographs to detect and record ground vibrations. The data geophysicists gather can be analyzed using mathematics to do things like map underground rock layers, locate oil and mineral deposits, or predict earthquakes and volcanic eruptions.