Conservation is the act of preserving, guarding or protecting; wise use.
Conservation may refer to:
Conservation (ethic) of biodiversity, environment, and natural resources, including protection and management
Conservation (cultural heritage) or Art conservation, protection and restoration of cultural heritage, including works of art and architecture, as well as archaeological and historical artifacts
Conservation law, measurable property of isolated physical system that does not change as the system evolves, including conservation of energy, mass, momentum, electric charge, subatomic particles, and fundamental symmetries
Conservation of biodiversity, environment, and natural resources
Conservation refers to a logical thinking ability which, according to the psychologistJean Piaget, is not present in children during the preoperational stage of their development at ages 2–7, but develops in the concrete operational stage at ages 7–11. Conservation refers to the ability to determine that a certain quantity will remain the same despite adjustment of the container, shape, or apparent size.
Conservation tasks test a child’s ability to see that some properties are conserved or invariant after an object undergoes physical transformation. The following tasks also explain the different types of conservation. Piaget proposed that children's inability to conserve is due to weakness in the way children think during the preoperational stage (ages 4–5). This stage of cognitive development is characterized by children focusing on a single, salient dimension of height or length, while ignoring other important dimensions about a situation. Children during this stage also tend to focus on the static characteristics of objects, instead of focusing on when objects undergo changes, which is a critical element of the following tasks.
A local conservation law is usually expressed mathematically as a continuity equation, a partial differential equation which gives a relation between the amount of the quantity and the "transport" of that quantity. It states that the amount of the conserved quantity at a point or within a volume can only change by the amount of the quantity which flows in or out of the volume.