What are fossils?
Age of Earth (FL SC.7.E.6.3 & E.6.4)

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Science
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7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Fossils are the preserved remains or traces of ancient organisms, providing evidence of past life forms and environments.
2.
FLASHCARD QUESTION
Front
Why are fossils important for understanding Earth's history?
Back
They provide evidence of past life forms and environments.
3.
FLASHCARD QUESTION
Front
What is the Law of Superposition?
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.
4.
FLASHCARD QUESTION
Front
How does the Law of Superposition help in dating rock layers?
Back
It helps scientists determine the relative ages of rock layers based on their position.
5.
FLASHCARD QUESTION
Front
What can marine fossils in a mountain region indicate?
Back
They suggest that the region was once underwater.
6.
FLASHCARD QUESTION
Front
What is radiometric dating?
Back
Radiometric dating is a method used to determine the age of rocks and fossils by measuring the decay of radioactive isotopes.
7.
FLASHCARD QUESTION
Front
What is half-life in the context of radiometric dating?
Back
Half-life is the time it takes for half of a radioactive substance to decay.
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