Examlex
A ________ is a naturally occurring inorganic substance in the earth's crust.
Coordination
The organized and harmonious action of different parts of an organism or group to achieve a specific function or effect.
Secondary Circular Reactions
Secondary circular reactions, a concept in Piaget's theory of cognitive development, refer to the repetition of actions that produce an effect on the environment, observed in infants aged 4-8 months.
Primary Circular Reactions
A development stage in infants characterized by repetitive actions upon their own body, intended for the pleasure and sensory exploration these actions provide.
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