GEOLOGIC TIME SCALE

Enumerate the four (4) chronological units of the geologic time scale from largest to smallest unit.

What is the name of the earliest geological era?

What was the name of the supercontinent that existed during the Hadean Eon?

Which period of the Mesozoic Era is known for the extinction of the dinosaurs?

The “Age of Fishes” existed during the _________ and ________ periods.

The "Age of Amphibians" happened during __________ and __________ periods.

The “Age of Invertebrates” happened during _______ and ________ periods.

Arrange the following periods from youngest to oldest:

(A) Ordovician (B) Cambrian (C) Devonian (D) Silurian

(E) Carboniferous (F) Permian

Enumerate the four (4) recognized eons, from youngest to oldest.

__________ theorize that about 4.52 billion years ago the proto-Earth collided with a Mars-size planetoid named _________.