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Knowing that an amount stays the same when its shape or container changes is called:

ACentration
BAnimism
CConservation
DSeriation
Answer & Solution
Correct answer: C. Conservation
1. Piaget tested children with clay, liquids and counters that changed shape or arrangement. 2. The logical understanding that the quantity is unchanged by such changes is **conservation**. 3. It is absent in the preoperational stage and develops in the concrete operational stage. **Why not the others:** Centration is the error that blocks conservation; seriation is ordering by size. _Source: Wikipedia, "Conservation (psychology)", section "introduction" (revision 1351958246)_
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