Earth's History Timeline (Eons, Eras, Periods and Epochs)

How many Eons are there?

4

What is the first Eon?

Hadean

What is the second Eon?

Archean

What is the third Eon?

Proterozoic

What is the fourth Eon?

Phanerozoic

What are the Eons?

Hadean Archean Proterozoic Phanerozoic

How many Eras are there?

3

What is the first Era?

Paleozoic

What is the second Era?

Mesozoic

What is the third Era?

Cenozoic

What are the Eras?

Paleozoic Mesozoic Cenozoic

What Eon do the Paleozoic Mesozoic and Cenozoic Eras fall under?

Phanerozoic

How many Periods are in the Paleozoic Era?

6

What is the Periods in the Paleozoic Era's "trick"?

Cougs Only Sleep During Cold Periods

What is the first Period in the Paleozoic Era?

Cambrian

What is the second Period in the Paleozoic Era?

Ordovician

What is the third Period in the Paleozoic Era?

Silurian

What is the fourth Period in the Paleozoic Era?

Devonian

What is the fifth Period in the Paleozoic Era?

Carboniferous

What is the sixth Period in the Paleozoic Era?

Permian

What are the Periods in the Paleozoic Era?

Cambrian Ordovician Silurian Devonian Carboniferous Permian

How many Periods are in the Mesozoic Era?

3

What is the first Period in the Mesozoic Era?

Triassic

What is the second Period in the Mesozoic Era?

Jurrassic

What is the third Period in the Mesozoic Era?

Cretaceous

What are the Periods in the Mesozoic Era?

Triassic Jurassic Cretaceous

How many Periods are in the Cenozoic Era?

2

What is the first Period in the Cenozoic Era?

Teriary

What is the second Period in the Cenozoic Era?

Quaternary

What are the Periods in the Cenozoic Era?

Tertiary Quaternary

How many Epochs are there?

2

What is the first Epochs in the Cenozoic Era?

Pleistocene

What is the second Epochs in the Cenozoic Era?

Holocene

What are the Epochs?

Pleistocene Holocene

What Period do the Pleistocene and Holocene Epochs fall under?

Quarternary