1. The image below depicts the formation of what tectonic feature? A. Tephra B.
ID: 802004 • Letter: 1
Question
1. The image below depicts the formation of what tectonic feature?
A. Tephra
B. Accretionary prism
C. Ripples
D. Pillow lavas
E. Subduction currents
2. At which plate boundary type might you find this feature?
A. Transform fault
B. Fracture Zone
C. Hotspot
D. Subduction Zone
E. Divergent Mid-Ocean Ridge
3. The age of the earth is closest to:
A. 2.5 billion years
B. 3.5 billion years
C. 4.5 billion years
D. 5.5 billion years
E. 20 billion years
4. The age of the earth is known from:
A. The oldest volcanic rocks on Greenland
B. Dating meteorites using the decay of radioactive elements
C. Fossil algae in oldest rocks
D. Magnetic reversals of the oldest metamorphic rocks
E. Greek mythology
5. Which of the following statements IS true?
A. The earth formed from a different ring in the nebula than the other planets
B. On formation, the atmosphere was too hot for water vapor to condense
C. The terrestrial planets are denser than the Jovian planets
D. Initially the earth was homogeneous
E. All of the above statements are true
6. The “Iron Catastrophe’ involved which of the following?
A. Melting and concentration of iron/nickel at the Earth’s core
B. Eruption of iron rich magmas killing all life on early Earth
C. Poisoning of early cells by iron-rich bacteria
D. All of the above
E. None of the above
7. The three most abundant elements in Earth’s crust are:
A. Si, Al, and Fe
B. Si, Fe and O
C. Ca, Al and Mg
D. Si, Al, and O
E. Si, Ca, and Mg
8. Approximately how thick is the crust under a mid ocean ridge?
A. 25 km
B. 10 km
C. 40 km
D. 80 km
E. 30 km
9. Which of the following are equivalent (and correct)?
A. Lithosphere: upper-middle-lower mantle
B. Asthenosphere: upper-middle-lower mantle
C. Liquid core: inner core
D. Plates: lithosphere and upper asthenosphere
E. None of the above are equivalent and correct
10. How is the depth of the crust defined?
A. Heat flow measurements
B. Drilling
C. The Mohorovicic seismic discontinuity
D. Magnetic probe surveys
E. None of the above
Explanation / Answer
3) 4.5 billion years
4) Dating meteorites using the decay of radioactive elements
5) All of the above statements are true
6) Melting and concentration of iron/nickel at the Earth’s core
7) Si, Al, and O
8) 25 km
9) None of the above are equivalent and correct
10) None of the above
for 1 and 2 questions image is not available
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