How does physical science differ from biological science?

Physical science and biological science are distinct branches of the natural sciences, primarily differentiated by their subject matter. Physical science focuses on the inorganic world, dealing with nonliving materials and the fundamental properties of matter and energy. In contrast, biology is the study of living things and their vital processes.1234

While these fields are traditionally separated, they are increasingly unified through cross-disciplinary research. Modern physical scientists generally hold that the fundamental particles and forces governing the inorganic world also apply to living organisms, meaning that complex biological systems do not necessarily require new, separate physical principles. Consequently, the methods and concepts of physical science—such as those found in physics and chemistry—are essential to biological study. This integration is evident in fields like biophysics and biochemistry, where physical principles are used to investigate and elucidate biological phenomena.4253