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WorksheetsChapter 8: The Rock Record
Total questions: 13
Worksheet time: 6mins
Name
Class
Date
1.
The principle that a fault or body of rock is younger than any other body of rock that it cuts through is known as what?
a)
relative age
b)
law of crosscutting relationships
c)
varve
d)
law of super position
2.
The time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope is called what?
a)
uniformitarianism
b)
relative age
c)
half-life
d)
radioactive dating
3.
The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock
a)
varve
b)
index fossil
c)
trace fossil
d)
fossil
4.
Which of the following is a method of determining the absolute age of an object by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope?
a)
radiometric dating
b)
uniformitarionism
c)
law of superposition
d)
paleontology
5.
A principle that geologic processes that occurred in the past can be explained by current geologic processes is called...
a)
paleontology
b)
law of superposition
c)
relative age
d)
uniformitarianism
6.
The age of an object in relation to the ages of other objects is known as what?
a)
relative age
b)
absolute age
c)
half-life
d)
unconformity
7.
What is the scientific study of fossils called?
a)
uniformitarianism
b)
unconformity
c)
paleontology
d)
radiometric dating
8.
The principle that a sedimentary rock layer is older than the layers above it and younger than the layers below it if the layers are not disturbed is called ...
a)
unconformity
b)
law of crosscutting relationship
c)
law of superposition
d)
varve
9.
What is a fossilized mark that formed in sedimentary rock by the movement of an animal on or within soft sediment called?
a)
index fossil
b)
fossil
c)
trace fossil
d)
varve
10.
A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time is called what?
a)
law of crosscutting relationships
b)
unconformity
c)
radiometric dating
d)
varve
11.
The numeric age of an object or event, often stated in years before the present, as established by an absolute-dating process such as radiometric dating is known as what?
a)
half-life
b)
varve
c)
relative age
d)
absolute age
12.
A pair of sedimentary layers (one coarse, one fine) that is deposited in an annual cycle, commonly in glacial lakes, and that can be used to determine absolute age is called what?
a)
trace fossil
b)
index fossil
c)
varve
d)
fossil
13.
What is a fossil that is used to establish the age of a rock layer because the fossil is distinct, abundant, and widespread and the species that formed that fossil existed for only a short span of geologic time?
a)
index fossil
b)
trace fossil
c)
fossil
d)
varve
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