Time Designations 2

Front

Prehistoric or Prehistory

Back

a time period before writing

Front

Century

Back

a time period of 100 years

Front

Decade

Back

a period of 10 years

Front

Circa

Back

about

Front

CE

Back

Refers to Common Era. It is the same time period as AD

Front

AD

Back

stands for Anno Domini. Refers to "the Year of our Lord."

Front

BCE

Back

stands for Before Common Era. Refers to the same time period as BC.

Front

BC

Back

stands for Before Christ. Refers to the same time period as BCE.