16 terms

Geological Time Exercise

STUDY
PLAY

Terms in this set (...)

Which era is the age of the mammals?
Cenozoic
Which era is the age of the dinosaurs?
Mesozoic
Which era is the age of the trilobites?
Paleozoic
What eon do we live in?
Phanerozoic
What does the eon name phanerozoic mean?
abundant life
When was the Cambrian Explosion?
570 to 505 mya
In which eon did the sun and earth form?
Hadean
In which eon did life originate?
Hadean
From which eon come the earliest known fossils?
Archean
Photosynthesis began how many mya?
2500 mya
Photosynthesis marks the beginning of what eon?
Proterozoic
Multicellular organisms appeared in which eon?
Proterozoic
The Cambrian period is part of which era?
Paleozoic
When did most of the phyla we study first appear?
Paleozoic
The Great Dying/Extinction was ____ mya, and separates these two eras, the _______ and ______
245 mya, Paleozoic and Mesozoic
The "K-T Event/Extinction" was ____ mya and separates these two eras, the ______ and ______
66 mya, Mesozoic and Cenozoic