By the time a child enters the concrete operations stage of cognitive development he or she is capable of grasping the concept of conservation.

Question

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In the concrete operations stage of cognitive development, which typically occurs between the ages of 7 and 12, children become capable of understanding the concept of conservation, which refers to the ability to understand that certain physical characteristics of objects (such as quantity or volume) remain the same even when their appearance or arrangement changes.

By the Time a Child Enters the Concrete Operations Stage