Which of the following is not true children at the stage of concrete operations? group of answer choices
a. they acquire the concept of conservation.
b. they become able to think logically in concrete situations.
c. they acquire the concept of reversibility.
d. they become able to think logically in abstract situations. previousnext

In 1990, the average income for an american worker was $1,518 per month. in 2000, the average income for an american worker was $2,632 per month. during this time period, a basket of necessities (food, housing, etc.) increased from $657 per month in 1990 to $1,402 per month in 2000. the real value of income ▼ increased decreased over that 10-year period.

What is the role of buyer & seller in the marketplace

Chapter 1 what is the sociological perspective? why did durkheim say that some people are more likely to commit suicide? what does it mean that sociology us to see that “things are not as they seem"? what is the "sociological imagination"? how did industrialization and urbanization lead to the development of sociology? who is the "father" of sociology (and coined the term sociology)? what was the major goal of sociology’s pioneers like comte and durkheim? what did herbert spencer say? what did karl marx think caused social change? when did sociology become established as an academic discipline in the u.s.? what did w.e.b. dubois say was the major problem of the 20th century? what is the functionalist view of society? what is the main focus of the conflict perspective? why are gender and race important to the conflict perspective? what is the symbolic interactionist perspective? chapter 2 why is culture vital to human survival, and how is that different from animal instinct? what is the sapir-whorf hypothesis? what is a norm? what are mores and folkways? how does the u.s. compare to other nations in terms of how multicultural or culturally diverse it is? what is a subculture? what is a counterculture? what is cultural lag? can you give an example? what is the ethnocentrism vs. cultural relativism debate about?