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eons

100

What is an eon?

A large division in Earth's history, there are 4 eons in the span of Earth's timeline

200

Name the four eons 

Hadean, Archean, Proterozoic, and Phanerozoic 

300

In which eon did simple life begin to form

The archean eon

eras

100

What are eras?

Eras are a subdivision of eons, meaning they are more specific groupings throughout history 

200

What three eras took place in the Phanerozoic eon?

the paleozoic era, the mesozoic era, and the cenozoic era

300

During which era were dinosaurs in domination

This was during the mesozoic era

periods

100

What are periods?

A subdivision of eras, meaning they are more specifically categorized 

200

List one period from each of the three eras 

Cambrian period (paleozoic), triassic period (mesozoic), and quaternary period (cenozoic) 

answers may vary

300

During which period did the Ice Ages occur

This was during the quaternary era