What is the Law of Crosscutting?
Relative and Absolute Dating

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Science
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9th - 11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The Law of Crosscutting states that any geologic feature that cuts across other layers is younger than the layers it cuts across.
2.
FLASHCARD QUESTION
Front
What is the Half-Life of an isotope?
Back
The Half-Life of an isotope is the time required for half of the isotope in a sample to decay.
3.
FLASHCARD QUESTION
Front
What percentage of the parent isotope remains after 1 Half-Life?
Back
50% of the parent isotope remains after 1 Half-Life.
4.
FLASHCARD QUESTION
Front
What does the Law of Superposition state?
Back
The Law of Superposition states that in undisturbed layers of rock, younger rocks lie above older rocks.
5.
FLASHCARD QUESTION
Front
What is the percentage of carbon-14 remaining after 22,800 years?
Back
Approximately 6.25% of the original carbon-14 remains after 22,800 years.
6.
FLASHCARD QUESTION
Front
Define 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.
7.
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 using radiometric techniques.
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