Objectives:
Identify the three major eons that make up the geologic time scale and list three relative time periods.
Define the term mass extinction.
Use the geologic time sceal to date Earth's important geologic events.
Use the geologic time scale to identify the appearance or disappearance of specific living organisms on Earth.


Key Terms:
Eon
Stromatolites
Precambrian
Eras
Mass extinction
Pangaea
Epochs

Assignments & Lecture Notes:

History of the Earth Note Sheets (Video)-

Geologic Time Scale -



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