Geophysics is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis. Geophysicists study the physical aspects of the earth and its atmosphere and apply scientific principles in order to solve problems. They may also study other planets. ... Geophysicists who work for mining, oil, and natural gas companies usually look for deposits of petroleum or minerals. Geophysical observations are fundamental to our understanding of the Earth and how it works. Geophysics is also fundamental to the needs of society – it is essential for exploring for energy, water, and mineral resources, monitoring environmental impact and change and assessing natural and manmade hazards.