
Paleozoic Era
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Invertebrates
Back
do not have a backbone.
2.
FLASHCARD QUESTION
Front
The longest unit of Geologic time
Back
Eon.
3.
FLASHCARD QUESTION
Front
The shortest unit of Geologic time
Back
Epoch.
4.
FLASHCARD QUESTION
Front
Many organisms going extinct in a relatively short period of time
Back
Mass extinction.
5.
FLASHCARD QUESTION
Front
Eons are broken down into smaller units called
Back
Eras.
6.
FLASHCARD QUESTION
Front
What is the Paleozoic Era?
Back
A major era in Earth's history, spanning from about 541 to 252 million years ago, characterized by the emergence of diverse life forms.
7.
FLASHCARD QUESTION
Front
What significant event marks the end of the Paleozoic Era?
Back
The Permian-Triassic extinction event, the largest mass extinction in Earth's history.
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