At the Turn of the 20^th Century, About 50% of US

question 26

Multiple Choice

At the turn of the 20^th century, about 50% of US workers worked in either the agricultural or the domestic service spheres. Approximately 100 years later that percentage had decreased to which of the following figures?

• A) 4%
• B) 10%
• C) 16%
• D) 22%
• E) 35%

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Definitions:

Secondary Circular Reactions

Repetitive actions that an infant finds enjoyable and repeats for the sake of experiencing pleasure, typically observed from 4 to 8 months of age.

Object Permanence

Object permanence is the understanding that objects continue to exist even when they cannot be seen, heard, or otherwise sensed, a critical developmental milestone in infants.

Problem Solving

A mental process that involves discovering, analyzing, and solving problems to reach a goal or answer.

Ache

A continuous or persistent dull pain in a part of the body.