Closed System

A closed system refers to a physical or conceptual space where no matter or energy can enter or exit. In practical terms, this means that everything that occurs within the system is self-contained. For example, consider a sealed container of gas; the gas can move and interact inside the container, but nothing from the outside can influence it. Closed systems are often used in science to simplify experiments and understand processes without external interference, allowing for clearer analysis of how different elements interact within the defined boundaries.