What is the term for the principle that properties such as mass and volume remain unchanged despite changes in form?

The term for the principle that properties such as mass and volume remain unchanged despite changes in form is "Conservation." This principle is fundamental in various fields of science, particularly in physics and chemistry. The conservation laws state that certain physical properties remain constant in an isolated system. For instance, the law of conservation of mass asserts that mass can neither be created nor destroyed in a chemical reaction, only transformed from one form to another. Similarly, the conservation of volume applies in fluid dynamics, where the volume of an incompressible fluid remains constant regardless of the changes in its shape or flow. Understanding this principle is crucial for grasping how substances behave during physical changes, allowing for accurate predictions in scientific experiments and practical applications.