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- 1. Multiple Choice
The point of the earths surface directly above the point where an earthquake occurs is called the:
Focus
Epicenter
Fracture
Fault
- 2. Multiple Choice
Which block diagram to the right best shows a transform fault?
1
2
3
4
- 3. Multiple Choice
Which cross section shows the inferred movement of material in the asthenosphere beneath points X and Y?
1
2
3
4
- 4. Multiple Choice
When two tectonics plates collide, oceanic crust usually subducts beneath continental crust because oceanic crust is composed of igneous rocks that has
low density and is mafic
low density and is felsic
high density and is mafic
high density and is felsic
- 5. Multiple Choice
Alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of the
Mid-Atlantic Ridge
Yellowstone Hot Spot
San Andreas Fault
Peru-Chile Trench
- 6. Multiple Choice
In which cross section below do the arrows best show the convection occurring within the asthenosphere beneath line XY?
1
2
3
4
- 7. Multiple Choice
Samples of ocean floor bedrock were collected at points A, B, C and D. Which sequence shows the correct order of the age of the bedrock from oldest to youngest?
D>C>B>A
A>D>B>C
C>B>D>A
A>B>D>C
- 8. Multiple Choice
The boundary between which two tectonic plates is most similar geologically to the plate boundary at the Mid-Atlantic Ridge?
Eurasian and Indian-Australian
Nazca and South American
Pacific and Nazca
Cocos and Caribbean
- 9. Multiple Choice
Which map to the right best indicates the probable locations of continents 100 million years from now if tectonic plate movement continues at its present rate and direction? (answer can be found in ESRT)
1
2
3
4
- 10. Multiple Choice
Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has been spreading for millions of years?
the bedrock of the ridge and nearby seafloor is igneous rock
the ridge is the location of irregular volcanic eruptions
several faults cut across the ridge and nearby seafloor
seafloor bedrock is younger near the ridge and older farther away
- 11. Multiple Choice
Active volcanoes are most abundant along the
edges of tectonic plates
equatorial ocean floor
23.5oN and 23.5oS parallels of latitude
eastern coastlines of continents
- 12. Multiple Choice
The diagram to the right shows four major types of fault motion occurring in Earth’s crust. Which type of fault motion best matches the general pattern of crustal movement at California’s San Andreas fault?
1
2
3
4
- 13. Multiple Choice
The diagram represents a portion of Earth's interior. Letters A, B, and C represent interior layers. The graph shows the velocity of P-waves and S-waves at various depths in Earth's interior.
Which layers of Earth's interior are represented by letters A and B?
A is the crust and B is the rigid mantle.
A is the lithosphere and B is the asthenosphere
A is the asthenosphere and B is the crust.
A is the rigid mantle and B is the lithosphere
- 14. Multiple Choice
What is the approximate velocity in kilometers/second of the P-waves at a depth of 1000 kilometers?
6.2 km/s
7.2 km/s
11.3 km/s
13.8 km/s
- 15. Multiple Choice
The Moho is a boundary located in zone
A
B
C
D
- 16. Multiple Choice
What are the inferred pressure and temperature at the boundary of Earth's stiffer mantle and outer core?
1.5 million atmospheres pressure and an interior temperature of 4950°C
1.5 million atmospheres pressure and an interior temperature of 6200°C
3.1 million atmospheres pressure and an interior temperature of 4950°C
3.1 million atmospheres pressure and an interior temperature of 6200°C
- 17. Multiple Choice
Both P-waves and S-waves were received at seismic stations A and B, but only P-waves were received at seismic stations C and D. Which statement best explains why this occurred?
S-waves are much weaker than P-waves.
S-waves travel faster than P-waves.
The liquid outer core prevents S-waves fromtraveling to seismic stations C and D.
The solid outer core prevents S-waves fromtraveling to seismic stations C and D
- 18. Multiple Choice
What is the most probable reason for the absence of S-waves at station W?
S-waves were not generated at the epicenter.
S-waves cannot travel through liquids.
Station W was located on solid bedrock.
Station W was located on an island.
- 19. Multiple Choice
If a seismic station is 3200 km from an earthquake epicenter, which is the time needed for an S-wave to travel from the epicenter to the seismic station?
4 min 40 sec
6 min 0 sec
10 min 40 sec
11 min 10 sec
- 20. Multiple Choice
The first P-wave of an earthquake travels 5600 kilometers from the epicenter and arrives at a seismic station at 10:05 a.m. At what time did this earthquake occur?
9:49 a.m.
10:02 a.m.
9:56 a.m
10:14 a.m.
- 21. Multiple Choice
The map represents the movement of tectonic plates that resulted in the collision of India and Asia. Scientists believe that 71 million years ago, India was at position A.
Which present-day geologic feature in Nepal resulted from this collision?
a rift valley
a mountain range
an oceanic ridge
an oceanic trench
- 22. Multiple Choice
The epicenter of an earthquake is located near Massena, New York. According to the Earth Science Reference Tables, the greatest difference in arrival times of the P and S waves for this earthquake would be recorded in
Albany, New York
Utica, New York
Plattsburgh, New York
Binghamton, New York
- 23. Multiple Choice
Which diagram below best represents the pattern of magnetic orientation in the seafloor on the west (left) side of the ocean ridge?
- 24. Multiple Choice
Which inference can best be made from the diagram?
The orientation of the Earth's magnetic field has reversed with time.
The size of the continents has changed with time.
The elevation of sea level has changed with time.
The amount of fossil material preserved in the igneous rock has changed with time.
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