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Rock Layers And Geologic Time
Test Description: Review for Earth science test
Instructions: Answer all questions to get your test result.
1) Which of the following allows us to assume that, in undisturbed rock, the oldest layer is on the bottom?
A
The Law of Original Horizontality
B
Principle of Cross-Cutting Relationships
C
The Law of Superposition
D
All of the above
2) What does the principle of cross-cutting relationships tell us?
A
If an intrusion exists within a rock layer, the intrusion must be older
B
Rock layers will cross each other after an earthquake
C
Volcanoes are examples of cross-cutting relationships
D
If an intrusion exists within a rock later, the rock layer must be older
3) What are fossils of species that lived for a short period of time over a wide area?
A
Index
B
Mold
C
Imprint
D
Cast
4) T/F: Imprint fossils allow geologists to approximate the age of the rock layers in which they were found.
A
False
B
True
5) If the same fossils were found in different rock layers of different areas, geologists can assume that
A
The rock layers were created more than 50 million years apart
B
There is nothing we can conclude about finding the same fossils
C
The rock layers are approximately the same age
D
The fossils were moved from one layer to another by other animals
6) What is Earth's approximate age?
A
400.5 million years
B
400.5 billion years
C
4000.6 million years
D
4.6 billion years
7) We know Earth is approximately 4.6 billion years old, even though no rocks have been dated older than 4 billion years, because _________
A
Earth's crust is difficult to date
B
Earth's crust is subject to extensive erosion
C
Earth's crust was blasted away during the formation of Earth
D
Earth's crust is being destroyed by solar radiation
8) Which of the following causes erosion?
A
All of the above
B
Running water
C
Wind
D
Animal behavior patterns
9) T/F- Crevices in a mountain can become larger as water freezes and expands, then melts again.
A
True
B
False
10) Removing plants in an area with running water will cause which of the following?
A
Sedimentation of the hillside will decrease
B
Erosion of the area will increase
C
Erosion of the area will decrease
D
Sedimentation of the lake will increase
11) A sample of four rock layers is being examined. Layers 1-4 are tilted, and an intrusion cuts through layers 1-4. Which of the following must be true?
A
The 4th layer was tilted after the intrusion
B
The layers were tilted after the intrusion
C
The intrusion formed after the layers were tilted
D
The 4th layer was formed after the intrusion
12) Which of the following is the correct term for giving the age of rock layers and fossils with specific years?
A
Relative dating
B
Numerical Dating
C
Absolute Dating
D
Sequential Dating
*select an answer for all questions
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