Relative Dating and Index Fossils

Flashcard
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Science
•
8th Grade
•
Hard
+1
Standards-aligned
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1.
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 determining their exact age.
2.
FLASHCARD QUESTION
Front
What does the Law of Superposition state?
Back
The Law of Superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
Tags
NGSS.MS-ESS1-4
3.
FLASHCARD QUESTION
Front
What are Index Fossils?
Back
Index Fossils are fossils of organisms that were widespread but only existed for a short period of time, used to date the rock layers in which they are found.
Tags
NGSS.MS-ESS1-4
4.
FLASHCARD QUESTION
Front
What are the two key traits of good index fossils?
Back
Good index fossils are widespread geographically and have a short lifespan.
5.
FLASHCARD QUESTION
Front
How can you determine the relative age of rock layers?
Back
You can determine the relative age of rock layers by examining their position, the types of fossils they contain, and the principles of relative dating.
Tags
NGSS.MS-ESS1-4
NGSS.MS-LS4-1
6.
FLASHCARD QUESTION
Front
What is the significance of the Law of Cross-Cutting Relationships?
Back
The Law of Cross-Cutting Relationships states that if a rock layer is cut by another feature (like a fault or intrusion), the feature that cuts through is younger than the layers it disrupts.
Tags
NGSS.MS-ESS1-4
7.
FLASHCARD QUESTION
Front
What is an unconformity in geology?
Back
An unconformity is a gap in the geological record that represents a period of erosion or non-deposition.
Tags
NGSS.MS-ESS1-4
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