Geological Time Scale
Flashcard
•
Science
•
6th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the importance of studying fossils?
Back
Studying fossils provides information about how life and environmental conditions may have changed over time.
2.
FLASHCARD QUESTION
Front
What event marks the first appearance of most major groups of animals in the fossil record?
Back
The Great Cambrian Explosion.
3.
FLASHCARD QUESTION
Front
What is the chronological time chart that breaks down geological time into Eons, Eras, Periods, and Epochs called?
Back
Geological time scale.
4.
FLASHCARD QUESTION
Front
What are specialized fossils that indicate boundaries in geological time and help determine the age of rocks?
Back
Index fossils.
5.
FLASHCARD QUESTION
Front
Which fossil is considered the youngest?
Back
Fossil C.
6.
FLASHCARD QUESTION
Front
What is an Eon in the geological time scale?
Back
An Eon is the largest division of geological time, encompassing billions of years.
7.
FLASHCARD QUESTION
Front
What is an Era in the geological time scale?
Back
An Era is a subdivision of an Eon, lasting tens to hundreds of millions of years.
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