Fall 2024_Fossil Record

Flashcard
•
Biology
•
9th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the fossil record?
Back
The fossil record is the history of life on Earth as documented by fossils, which are the preserved remains or traces of organisms from the past.
2.
FLASHCARD QUESTION
Front
What is a half-life?
Back
The half-life is the length of time required for half of the radioactive atoms in a sample to decay.
3.
FLASHCARD QUESTION
Front
How do fossils form?
Back
Fossils typically form when organisms are buried quickly after death, preventing decay and allowing for mineralization.
4.
FLASHCARD QUESTION
Front
What is the significance of rock layers in understanding Earth's history?
Back
Rock layers, or strata, provide a chronological record of geological and biological events, helping scientists understand the age and evolution of life.
5.
FLASHCARD QUESTION
Front
What does it mean if a rock layer is older than another?
Back
If a rock layer is older, it was deposited before the other layer, indicating that it contains older fossils and geological features.
6.
FLASHCARD QUESTION
Front
What is the principle of superposition?
Back
The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.
7.
FLASHCARD QUESTION
Front
What is a parent isotope?
Back
A parent isotope is the original radioactive isotope that undergoes decay to form a daughter product.
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