Ethnicity involves more than race.

Variation.

A race may possess several ethnicities. For example, African blacks (a human race) have different ethnical tribes, with a different belief system and a very diverse cultural wealth, sometimes within the same country.

This means that race is a concept that obeys parameters to define different populations of the same biological species. Ethnicities are different associations belonging to the same race.

i disagree that there is little difference between adult female development and adult male development. sociological studies comparing female and male pathways to adulthood, revelead that there are sustancial differences between them. particularly, female and male differ from timing of marriage, when they began to live with children and the likelihood of combining wife/husband and parent roles.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.