Which eminent historian called the process of replacing one paradigm with another a scientific revolution??

Large and loose groups, referred to as ________, are comprised of individuals who share particular characteristics but who may not interact with one another

A) status groups. B) crowds C) cohort groups. D) cliques.

Theories are vital tools because they

A) provide organizing frameworks for our observations of children. B) provide the ultimate truth about child development. C) do not require scientific verification. D) are resistant to the influence of cultural values and belief systems.