Fossils/Dating Question Preview (ID: 38559)
Earth History Unit.
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An unstable element that decays at a predictable rate, is a ...
a) atom
b) fossil
c) isotope
d)
This type of fossil is found in many places, lived a short time period, and used for relative dating
a) trace
b) cast
c) mold
d) index
A scientist is using an isotope to determine the age of a fossil. What method of dating is the scientist using?
a) absolute dating
b) relative dating
c) fossil correlation
d) law of superposition
A geologist found 600-year-old sediments below a particular rock layer. Which will the geologist most likely find above the rock layer?
a) 650-year-old sediments
b) 450-year-old sediments
c) 600-year-old sediments
d) 1,000-year-old sediments
Which process would be most effective in determining the age of fossils embedded in rock?
a) correlation of index fossils
b) core sampling
c) radioactive decay
d) none of the above
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 fossils
b) Different rock layers contain only specific species of index fossils.
c) Different rock layers can be determined to be the same RELATIVE age if they contain the same index fossils
d) Different rock layers can be compared to determine the EXACT age of index fossils.
Which conclusion can be made when observing multiple undisturbed layers of rock?
a) The shallow layers are older than the deeper layers.
b) The deeper layers are younger than the shallow layers.
c) The deeper layers are older than the shallow layers.
d) The shallow layers are the same age as the deeper layers.
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 African rock is older.
b) The rocks are younger than the fossils.
c) The rocks are approximately the same age.
d) The South American rock is older.
Which is the most accurate method used in determining the age of a fossil?
a) relative dating
b) absolute/radiometric dating
c) law of superposition
d) fossil correlation
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 species of mammoth.
b) It determines the age of the mammoth.
c) It determines the cause of death of the mammoth.
d) It identifies the diet of the mammoth.
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