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Fossils 1 (ClassScape)
Test Description: ClassScape Questions from 8.E.2.1
Instructions: Answer all questions to get your test result.
1) A scientist finds an index fossil in layers of rock in both Africa and South America. What does this indicate about the ages of the rocks?
A
The rocks are approximately the same age.
B
The African rock is older.
C
The rocks are younger than the fossils.
D
The South American rock is older.
2) Which is the most accurate method used in determining the age of a fossil?
A
law of superposition
B
geologic column
C
relative dating
D
radioactive dating
3) Which are scientists most likely to use to estimate the age of Earth?
A
water samples
B
soil samples
C
rock layers
D
organic fossils
4) Through relative dating, a geologist finds a fossil that is approximately 10,000 years old. Which radioactive element would the geologist most likely use to accurately calculate th
A
gallium-67 with a half-life of 78 hours
B
iodine-129 with a half-life of 16 million years
C
plutonium-238 with a half-life of 88 years
D
carbon-14 with a half-life of 5,700 years
5) 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 cause of death of the mammoth.
C
It identifies the species of mammoth.
D
It determines the age of the mammoth.
6) Which conclusion can be made when observing multiple undisturbed layers of rock?
A
The shallow layers are the same age as the deeper layers.
B
The deeper layers are younger than the shallow layers.
C
The shallow layers are older than the deeper layers.
D
The deeper layers are older than the shallow layers.
7) Which process would be most effective in determining the age of fossils embedded in rock?
A
use of core sampling
B
absolute dating
C
use of index fossils
D
relative dating
8) Which best describes the relationship between rock layers and index fossils?
A
Different rock layers can be determined to be the same exact age if they contain the same index foss
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 relative age if they contain the same index f
9) Which method of radioactive dating would be most useful in determining the age of a human fossil?
A
rubidium-strontium method
B
uranium-lead method
C
carbon-14 method
D
potassium-argon method
10) A geologist found 600-year-old sediments below a particular rock layer. Which will the geologist most likely find above the rock layer?
A
600-year-old sediments
B
650-year-old sediments
C
450-year-old sediments
D
1,000-year-old sediments
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