Race is an unreliable concept which changes even with geography.
Race depends more on the society in which we live more than on our biological characteristics.
Ethnicity refers to cultural characteristics.
Ethnicity is a sense of belonging to a certain group.
“Derived from the word ethnos (a Greek word meaning “people” or “nation”),ethnicity and ethnic refer to people who identify with one another on the basis of common ancestry and cultural heritage” (Henslin, 2014, p.256).
For example a child born from Russian parents and adopted by Japanese family will still be treated as “white”, Russian. Raised in Japan the kid does not know Russian language,