Chemistry is the science of substances and their interconversions. Subjects studied in chemistry range from microscopic and theoretical properties of atoms and molecules to topics in materials science, biological sciences, environmental science, agriculture, food science, geology and astronomy. A background in chemistry is important not only for chemists, but also for students going into biology, medicine, pharmacy, engineering, and even in such specialized fields as enology and art conservation. In addition to chemistry courses, chemistry majors need to have strong backgrounds in math and physics.