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Fossils/Dating
Test Description: Earth History Unit
Instructions: Answer all questions to get your test result.
1) A scientist finds the same type of index fossil in layers of rock in both Africa and South America. What does this indicate about the ages of the rocks?
A
The South American rock is older.
B
The African rock is older.
C
The rocks are approximately the same age.
D
The rocks are younger than the fossils.
2) Which is the most accurate method used in determining the age of a fossil?
A
relative dating
B
fossil correlation
C
absolute/radiometric dating
D
law of superposition
3) Scientists uncover mammoth bones and are able to determine the amount of carbon-14 in the bones. Which best explains the use of carbon-14 in studying the mammoth?
A
It identifies the diet of the mammoth.
B
It determines the age of the mammoth.
C
It determines the cause of death of the mammoth.
D
It identifies the species of mammoth.
4) Which conclusion can be made when observing multiple undisturbed layers of rock?
A
The deeper layers are younger than the shallow layers.
B
The shallow layers are older than the deeper layers.
C
The shallow layers are the same age as the deeper layers.
D
The deeper layers are older than the shallow layers.
5) Which process would be most effective in determining the age of fossils embedded in rock?
A
radioactive decay
B
correlation of index fossils
C
core sampling
D
none of the above
6) Which best describes the relationship between rock layers and index fossils?
A
Different rock layers can be determined to be the same RELATIVE age if they contain the same index fossils
B
Different rock layers contain only specific species of index fossils.
C
Different rock layers can be compared to determine the EXACT age of index fossils.
D
Different rock layers can be determined to be the same EXACT age if they contain the same index fossils
7) A geologist found 600-year-old sediments below a particular rock layer. Which will the geologist most likely find above the rock layer?
A
1,000-year-old sediments
B
650-year-old sediments
C
450-year-old sediments
D
600-year-old sediments
8) A scientist is using an isotope to determine the age of a fossil. What method of dating is the scientist using?
A
fossil correlation
B
relative dating
C
absolute dating
D
law of superposition
9) An unstable element that decays at a predictable rate, is a ...
A
atom
B
isotope
C
fossil
10) This type of fossil is found in many places, lived a short time period, and used for relative dating
A
trace
B
index
C
mold
D
cast
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