Absolute Dating vs Relative Dating
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Absolute Dating?
Back
A method used to determine the exact age of a rock or fossil in years, often using radioactive decay.
Tags
NGSS.HS-PS1-8
2.
FLASHCARD QUESTION
Front
What is Relative Dating?
Back
A technique used to determine the age of rocks or fossils in relation to other rocks or fossils, without providing a specific age.
3.
FLASHCARD QUESTION
Front
What is a half-life?
Back
The length of time required for half of the radioactive atoms in a sample to decay.
Tags
NGSS.HS-PS1-8
4.
FLASHCARD QUESTION
Front
If you start with 1000 parent atoms, how many will remain after 1 half-life?
Back
500 parent atoms.
Tags
NGSS.HS-PS1-8
5.
FLASHCARD QUESTION
Front
If the half-life of a radioactive isotope is 100 years, how old is the rock after two half-lives?
Back
200 years.
Tags
NGSS.HS-PS1-8
6.
FLASHCARD QUESTION
Front
If the half-life of a radioactive isotope is 300 years, how old is the rock after three half-lives?
Back
900 years.
Tags
NGSS.HS-PS1-8
7.
FLASHCARD QUESTION
Front
What does the Principle of Superposition state?
Back
In an undisturbed sequence of rock layers, the oldest layer is at the bottom.
Tags
NGSS.MS-ESS1-4
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