What is an index fossil?
8.E.2

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Science
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8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An index fossil is a fossil that is used to define and identify a particular time period in the geological time scale. It must have lived for a relatively short period of time and be widely distributed.
2.
FLASHCARD QUESTION
Front
What does absolute age indicate?
Back
Absolute age indicates the actual age of a rock or fossil in years, determined through methods like radiometric dating.
3.
FLASHCARD QUESTION
Front
What is relative dating?
Back
Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without providing a specific numerical age.
4.
FLASHCARD QUESTION
Front
What does the law of superposition state?
Back
The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
5.
FLASHCARD QUESTION
Front
What are fossils?
Back
Fossils are traces or remains of organisms that lived long ago, preserved in sedimentary rock.
6.
FLASHCARD QUESTION
Front
What is the difference between absolute age and relative age?
Back
Absolute age provides a specific age in years, while relative age indicates whether an object is older or younger than another.
7.
FLASHCARD QUESTION
Front
What is superposition in geology?
Back
Superposition is a principle that helps determine the relative ages of rock layers, stating that in a sequence of undisturbed layers, the oldest is at the bottom.
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