Conservation refers to a logical thinking ability that allows a person to determine that a certain quantity will remain the same despite adjustment of the container, shape, or apparent size, according to the psychologist Jean Piaget.

Dictionary result for conservation

prevention of wasteful use of a resource.
"the government must take action to promote energy conservation"

the principle by which the total value of a physical quantity or parameter (such as energy, mass, linear or angular momentum) remains constant in a system which is not subject to external influence.

the act of conserving; prevention of injury, decay, waste, or loss; preservation:

conservation of wildlife; conservation of human rights.

official supervision of rivers, forests, and other natural resources in order to preserve and protect them through prudent management.

a district, river, forest, etc., under such supervision.

the careful utilization of a natural resource in order to prevent depletion.

the restoration and preservation of works of art.