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Geologic Time Vocab
Test Description: Review the terms from the Geologic time unit.
Instructions: Answer all questions to get your test result.
1) States that the oldest rocks lie on the bottom and the youngest rocks are on top of any undisturbed sequence of sedimentary rocks.
A
Law of Superposition
B
Unconformity
C
Radioactive dating
D
Geologic Time Scale
2) The process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample.
A
Index Fossil
B
Radioactive dating
C
Absolute Age
D
Relative Age
3) Gaps in the rock record.
A
Fossil
B
Law of Superposition
C
Intrusion
D
Unconformity
4) Any method of measuring the age of an event or object in years. The actual age for a rock or mineral.
A
Radioactive dating
B
Absolute Age
C
Geologic Time Scale
D
Relative Age
5) Found in a narrow time range but widely distributed around the earth.
A
Intrusion
B
Index Fossil
C
Fossil
D
Extinction
6) Uses information about rock layers and the fossil record to determine the age relationships between rocks.
A
Absolute Age
B
Radioactive dating
C
Fossil
D
Relative Age
7) Occurs when a large proportion of the earth’s species go extinct in a relatively short period of time.
A
Law of Superposition
B
Intrusion
C
Mass Extinction
D
Unconformity
8) An igneous rock layer formed when magma hardens beneath Earth’s surface.
A
Intrusion
B
Unconformity
C
Fault
D
Fossil
9) A type of fossil that provides evidence of the activity of ancient organisms.
A
Index Fossil
B
Mold
C
Cast
D
Trace Fossil
10) A fossil in which minerals replace all or part of an organism
A
Trace Fossil
B
Index Fossil
C
Carbon Film
D
Petrified Fossil
*select an answer for all questions
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