Science fusion unit 4: Relative and Absolute Dating

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•
Science
•
8th Grade
•
Hard
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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 providing a specific numerical age.
2.
FLASHCARD QUESTION
Front
What is Absolute Dating?
Back
Absolute dating is a method used to determine the exact age of a rock or fossil, often expressed in years, using techniques such as radiometric dating.
3.
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.
4.
FLASHCARD QUESTION
Front
What is the Principle of Cross-Cutting Relationships?
Back
The Principle of Cross-Cutting Relationships states that a fault or intrusion is younger than the rock layers it cuts through.
5.
FLASHCARD QUESTION
Front
Define Uniformitarianism.
Back
Uniformitarianism is the principle that geological processes occurring today are the same as those that occurred in the past, summarized as 'the present is the key to the past'.
6.
FLASHCARD QUESTION
Front
What is a Half-Life?
Back
A half-life is the time required for half of the parent isotope in a sample to decay into a daughter isotope.
7.
FLASHCARD QUESTION
Front
How much of the parent isotope remains after 1 Half-Life?
Back
50% of the parent isotope remains after 1 Half-Life.
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