Geologic time scale Flashcards
(6 cards)
1
Q
What is a geologic time scale.
A
A system to mesure and describe Earth’s history.
2
Q
List the four major eons in order.
A
Hadean, Archean, Proterozoic, and Phanerozoic.
3
Q
Which eons are in the precambrian?
A
The Hadean, Archean, and Proterozoic.
4
Q
An eon is divided into:
A
eras!
5
Q
What are the eras in the Phanerozoic?
A
The Paleozoic, Mezozoic, and Cenozoic
6
Q
An era is divided into:
A
periods!
