Index Fossils

Flashcard
•
Science
•
8th Grade
•
Hard
+1
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an index fossil?
Back
An index fossil is a fossil that is used to define and identify a particular time period in the geologic time scale. It must be widespread, abundant, and have lived for a relatively short period of time.
Tags
NGSS.MS-ESS1-4
2.
FLASHCARD QUESTION
Front
What is relative dating?
Back
Relative dating is the method of determining the age of a fossil or rock layer in relation to other fossils or rock layers, without determining their exact age.
Tags
NGSS.MS-ESS1-4
3.
FLASHCARD QUESTION
Front
What is absolute dating?
Back
Absolute dating is the process of determining the exact age of a fossil or rock layer, often using methods like radiometric dating.
Tags
NGSS.HS-ESS1-5
4.
FLASHCARD QUESTION
Front
Why are index fossils important in geology?
Back
Index fossils help geologists correlate the age of rock layers across different locations and provide information about the environment in which the organisms lived.
Tags
NGSS.MS-ESS2-3
NGSS.MS-LS4-1
5.
FLASHCARD QUESTION
Front
What is the principle of superposition?
Back
The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
Tags
NGSS.MS-ESS1-4
6.
FLASHCARD QUESTION
Front
What does it mean if a fossil is found in a higher rock layer?
Back
If a fossil is found in a higher rock layer, it generally indicates that the organism lived more recently compared to those found in lower layers.
Tags
NGSS.MS-ESS1-4
7.
FLASHCARD QUESTION
Front
What is the significance of a fossil being widespread?
Back
A widespread fossil is significant because it can be used as an index fossil to correlate the age of rock layers across different geographic locations.
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