Earth History

Flashcard
•
Other Sciences
•
8th Grade
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
Types of fossils EXCEPT: Mineral Replacement, Bone neutralization, Carbon Film, Cast and Mold
Back
Bone neutralization
2.
FLASHCARD QUESTION
Front
The half-life of Carbon-14 is 5,730 years. How much parent material is left after 5,730 years?
Back
50%
3.
FLASHCARD QUESTION
Front
How can the absolute age of an igneous rock be determined?
Back
comparing radioactive isotopes
4.
FLASHCARD QUESTION
Front
What is the characteristic of the bottom layer of rock?
Back
the oldest
5.
FLASHCARD QUESTION
Front
Index fossils are useful for determining the relative age by ...
Back
a narrow time range and a wide geographic range
6.
FLASHCARD QUESTION
Front
In what way are index fossils and layers of ash found in ice cores?
Back
both are used for relative dating
7.
FLASHCARD QUESTION
Front
Which time period on the chart was the longest?
Back
Cambrian
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