A scientific law is a concise statement or a mathematical equation that describes a consistent, observable relationship between natural phenomena under specified conditions. These laws summarize observations, providing a predictive framework for how systems behave, such as the relationship between force, mass, and acceleration, or the conservation of energy within a closed system. It is crucial to understand that while a law describes *what* happens—how variables relate—it does not necessarily explain *why* it happens. This explanatory role belongs to scientific theories, which build upon verified laws and observations to provide a comprehensive model of the underlying mechanism. The validity of a law is established through consistent empirical testing and observation across diverse conditions.