A working knowledge of thermodynamics will open your understanding of how heat behaves under different circumstances. Whether you're inside or outdoors, the temperature affects nearly everything you do, from what you wear to what you eat and drink. If you're interested in why heat acts the way it does in different environments, you'll want to study thermodynamics. If you're looking for a career in physical science, it's crucial to have an understanding of thermodynamics and how systems of heat and temperature work because thermodynamics explains more about the world than other disciplines of physics.