Final
Final Exam (timed and single access)
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Part 1 of 1 - Final Exam Question Pool 44.0/ 100.0 Points
Question 1 of 50
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... [Show More] 2.0 Points
For the block diagram below, which of the following statements is (are) true?
block diagram
A.The igneous intrusion labeled B is older than Unit 3
B.The igneous intrusion labeled B is younger than Unit 4.
C.The igneous intrusion labeled B is younger than the tilted sequence 1.
Incorrect D.Both A and C are true statements.
E.Both B and C are true statements
Answer Key: C
Feedback: Unit B cuts across (dissects) Units 1, 2, and 3, and thus according to the principle of
cross-cutting relationships, it is younger and answer c is a correct statement. According to this
same principle, Unit 4 cuts across Unit B and is younger, thus choice b is false.
Question 2 of 50
0.0/ 2.0 Points
Identify this very common mystery mineral, which is almost always present in light colored
rocks and sandstones: hardness of 7, no cleavage, exhibits conchoidal fracture, glassy luster.
A.calcite
B.quartz
Incorrect C.feldspar
D.gypsum
E.halite
Answer Key: B
Feedback: This was one of the unknown mineral hand samples in Laboratory 5 that was
identified using the characteristics listed. It is also described in Appendix C of the text.
Question 3 of 50
0.0/ 2.0 Points
Identify this very common mystery mineral found in many igneous and metamorphic rocks:
hardness of 5.5, two cleavage directions (intersecting at 60 and 120 degrees), nonmetallic luster,
specific gravity = 3.3, and dark green to black color.
Incorrect A.feldspar
B.magnetite
C.biotite
D.quartz
E.hornblende
Answer Key: E
Feedback: This was one of the unknown mineral hand samples in Laboratory 5 that was
identified using the characteristics listed. It is also described in Appendix C of the text.
Question 4 of 50
2.0/ 2.0 Points
In what fundamental way is the process of metamorphism different from that of diagenesis and
lithification?
A.Metamorphism requires melting of preexisting rock.
B.Diagenesis and lithification do not cause any significant changes in the rock or sediment.
C.Diagenesis and lithification occur at higher temperatures and pressures.
Correct D.Diagenesis and lithification occur at lower temperatures and pressures.
Answer Key: D
Feedback: As in diagenesis and lithification, metamorphism involves heat and pressure, but the
temperatures and pressures involved are considerably higher. Some of the same physical
processes that occur in diagenesis, such as compaction and recrystallization, continue during
metamorphism—but in a more intense way.
Question 5 of 50
2.0/ 2.0 Points
Which of the following is not a significant natural cause of climate change?
A.plate tectonics
Correct B.erosion of the land
C.solar variability
D.variations in Earth’s orbit
E.volcanic activity
Answer Key: B
Feedback: Three kinds of orbital change combine to affect Earth’s climate (eccentricity, tilt,
precession). These factors interact to control how much sunlight reaches Earth at any given time
Major volcanic eruptions can cause global cooling. The global oceanic circulation is directly
influenced by the geographic distribution of continents and oceans basins, which in turn
influence climate.
Question 6 of 50
2.0/ 2.0 Points
Sedimentary rocks often preserve clues about the environment in which the sediment was
deposited. Which of these answers would best do that?
A.synclines and anticlines
B.normal faults and reverse faults
Correct C.mud cracks and ripple marks
D.layers of lava and ash
Answer Key: C
Feedback: Synclines and anticlines form well after the sedimentary rock formed, so they hold no
clues about the depositional environment. Same for the faults. Mud cracks and ripple marks tell
you that at one time, water was present, and that water was either drying up (mud cracks) or
moving (ripple marks). This is the correct answer. The final answer is not appropriate because
lava and ash are volcanic products, not sedimentary rocks.
Question 7 of 50
0.0/ 2.0 Points
Chemical weathering would be most analogous to which process?
Incorrect A.a telephone pole leaning downslope
B.leaching water through ground coffee beans to make coffee
C.a truck slowly enlarging a pothole
D.your sidewalk cracking in the winter [Show Less]