Index Fossils
Flashcard
•
Science
•
8th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What are index fossils?
Back
Index fossils are fossils of organisms that were widespread but existed for a relatively short period of geological time. They are used to date and correlate the age of rock layers.
Tags
NGSS.MS-LS4-1
2.
FLASHCARD QUESTION
Front
What are the two key traits of the best index fossils?
Back
The best index fossils are widespread geographically and have a short lifespan.
3.
FLASHCARD QUESTION
Front
According to the law of superposition, where are the oldest fossils found?
Back
The oldest fossils are found near the bottom of the rock layers.
Tags
NGSS.MS-ESS1-4
4.
FLASHCARD QUESTION
Front
What is relative dating?
Back
Relative dating is the method of sequencing events based on the order in which they occurred, without determining their exact age.
Tags
NGSS.MS-ESS1-4
5.
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 radiometric techniques.
6.
FLASHCARD QUESTION
Front
What is the significance of index fossils in geology?
Back
Index fossils help geologists to identify the relative ages of rock layers and to correlate them across different geographic locations.
Tags
NGSS.MS-ESS1-4
NGSS.MS-ESS2-3
7.
FLASHCARD QUESTION
Front
What does it mean if two rock layers contain the same index fossil?
Back
If two rock layers contain the same index fossil, it suggests that they were formed during the same geological time period.
Tags
NGSS.MS-ESS1-4
NGSS.MS-LS4-1
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