Concrete

Stone, Concrete, Ceramics, and Glass Career Field

The stone, concrete (cement mixed with gravel or crushed rock), ceramics, and glass industries represent human creativity and resourcefulness in using material from the earth to make things that can make our lives easier. From the earth come all the elements needed to construct things such as roads, buildings, bathroom fixtures, and rocket components. Stone

Concrete Operational Period

The  concrete  operational  period  is  the  third period in Jean Piaget’s theory of cognitive development. Piagetian periods occur in invariant order. Thus, a child must pass through the sensorimotor and preoperational periods before entering the concrete operational period and must pass through the concrete operational period before entering the formal operational  period.  Although  exact  ages

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