​ https://youtu.be/ccwFRZFsDbk

• ​BC = Before _______ or...

• BCE = Before the ___________

​ex. 10 BC

• ​AD = Anno _______ or...

• CE = Common _____

​​ex. AD 10

​

Timeline Terms​

Decade = 10 years

Century = 100 years

Millennium = 1,000 years

​

2nd largest geological time

300-150 million yrs.​

ERa

smallest geological time

2.5 - 40 million yrs.​

Epoch

• ​BC = Before Christ

• BCE = Before the Common Era

​ex. 10 BC or 10 BCE

• ​AD = Anno Domini ("year of our Lord") or...

• CE = Common Era

​​ex. AD 10 or CE 10

​

Timeline Terms​

​Years Between Dates​

Same labels = Subtraction

Different Labels = Addition​

​Ex.) 500 BC to 300 BC = _____ yrs.

​Ex.) 500 BC to AD 300 = _____ yrs.​