this flexible degree is for students wanting to gain geoscience expertise outside of core geology. as an earth science major, you will begin with the fundamentals of earth science coupled with some basic mathematics, chemistry and physics. after completing the fundamentals, an earth science major may focus on the earth-human issues, such as geological hazards, climate change and even the geology of national parks. alternatively, the earth science major may be enhancing another science major with specific earth science knowledge, such as geochemistry, geophysics or remote sensing. most earth science majors are interested in environmental conservation, parks and planning, science journalism, policy, economics, engineering; communications and business students often consider this for a second major.