Molecular dynamics is a simulation technique used to study the physical behavior of molecules over time. The term molecular dynamics is often interchangeably used with the term molecular simulation, which refers to the same technique. Other synonyms for molecular dynamics include molecular mechanics, particle simulations, and molecular modeling. Molecular mechanics is a more specific term used to describe simulation methods that rely on classical mechanics to predict molecular behavior. Particle simulations refer to techniques that simulate the motion of individual particles in a system, while molecular modeling encompasses a wide range of techniques used to study the structure and properties of molecules. Regardless of the term used, molecular dynamics plays an important role in understanding the behavior of molecules and their interactions in biological, chemical, and physical systems.