Matching Pairs Periods of TimeOnline version Vocabulary related to periods of time. by Jorge Cardoza 1 A period of 100 years. 2 It was a decade of the Gregorian calendar that began on January 1, 1970, and ended on December 31, 1979. 3 A period of one thousand years. 4 A period of human life, measured by years from birth, 5 All of the people born and living at about the same time, regarded collectively. 6 It is a span of time defined for the purposes of chronology or historiography. 7 70s 8 A period of twenty-five years. 9 A period of ten years. 10 It was a decade of the Gregorian calendar that began on January 1, 1980, and ended on December 31, 1989. 11 80s An era A millenium The nineteen-eighties (1980s) An age a decade A century The nineteen-seventies (1970s) A generation Same as nineteen-seventies (1970s) A quarter-century Same as nineteen-eighties (1980s)