A career in the geo-sciences involves studying the physical aspects of the Earth and searching for resources such as metals, minerals, and petroleum. Geoscientists usually specialize in one closely related field such as geology, hydrology, or geochemistry. A master's degree is required for most positions, though a bachelor's degree is sufficient to enter the field. Geoscientists need skills in GPS, GIS, communication, teamwork, and fieldwork, and there are always job opportunities available, especially for those with advanced degrees. Salaries average around $80,000 annually in the private sector and $94,000 in government roles.