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WorksheetsEarth Science, Ch 8, The Rock Record, Quiz
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
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
2.
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
3.
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
4.
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
5.
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
6.
What is the scientific study of fossils called?
a)
uniformitarianism
b)
unconformity
c)
paleontology
d)
radiometric dating
7.
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
8.
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
9.
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
10.
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
11.
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
12.
This rock diagram has a line running through with arrows pointing in the direction of rock movement. What does the line represent?
a)
A fold
b)
A fault
c)
A tilt
d)
An intrusion
13.
What is the idea that geologic change occurs suddenly?
a)
Uniformitinarianism
b)
Geologic Breakdown
c)
Catastrophism
d)
Geologic Purge
14.
What forms when sediment fills in a cavity left by a dead organism?
a)
Cast
b)
Index
c)
Trace
d)
Geology
15.
What type of fossil is a mark or cavity made by a body part?
a)
Cast
b)
Index
c)
Mold
d)
Trace
16.
How far back in time can geologists study the history of the earth?
a)
1.6 billion years
b)
46 million years
c)
4.6 billion years
d)
160 billion years
17.
What is the best understanding of time?
a)
ancient geologic time theory
b)
current geologic time column
18.
Why scientists think dinosaurs became extinct?
a)
Climate change
b)
Frozen Oceans
c)
Forest Fire
d)
Cloud Dust
19.
Which type of absolute dating is used for organic specimens.
a)
carbon-14 dating
b)
plutonium dating
c)
potassium-argon dating
d)
uranium dating
20.
What type of rocks are fossils usually found in?
a)
igneous
b)
metamorphic
c)
sedimentary
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