Geologic Time Scale Flashcards
1
Q
It is a record of the life forms and geologic events in Earth’s history.
A
Geologic Time Scale
2
Q
What are the 4 geologic columns that has subdivisions assigned?
A
- eons
- eras
- periods
- epochs
3
Q
What represents the longest amount of time?
A
Eons
4
Q
What are the 2 eons?
A
Precambrian eon and Phanerozoic eon
5
Q
What eon that humans are apart of?
A
Phanerozoic eon
6
Q
What are the 3 Eras under Phanerozoic Eon?
A
- Paleozoic Era or the Era of Old Life
- Mesozoic Era or the Age of Reptiles
- Cenozoic Era or the Era of Recent Life or the Age of Mammals
7
Q
What is the smallest unit in the geologic time scale?
A
Epochs
