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Geologic Time Scale
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Total cards: 7•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (7)
#1
Front (Question)
It is a record of the life forms and geologic events in Earth’s history.
Back (Answer)
Geologic Time Scale
#2
Front (Question)
What are the 4 geologic columns that has subdivisions assigned?
Back (Answer)
• eons • eras • periods • epochs
#3
Front (Question)
What represents the longest amount of time?
Back (Answer)
Eons
#4
Front (Question)
What are the 2 eons?
Back (Answer)
Precambrian eon and Phanerozoic eon
#5
Front (Question)
What eon that humans are apart of?
Back (Answer)
Phanerozoic eon
#6
Front (Question)
What are the 3 Eras under Phanerozoic Eon?
Back (Answer)
• 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
Front (Question)
What is the smallest unit in the geologic time scale?
Back (Answer)
Epochs