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AMU ERSC181 week 8 Final Exam, graded $14.61
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Exam (elaborations)

AMU ERSC181 week 8 Final Exam, graded

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  • Course
  • SCIN 181
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  • American Public University

AMU ERSC181 week 8 Final Exam, graded -A coarse-grained (phaneritic texture) igneous rock formed . • A. due to erosion, frost wedging, and weathering • B. on the surface of the earth in an explosive eruption • C. on the surface of the earth in a quiet (effusive) erupt...

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  • February 23, 2022
  • 31
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • scin 181
  • graded
  • graded
  • amu ersc181 week 8 final exam

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  • American Public University
  • SCIN 181
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Week 8 Final Exam (timed and single access)
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Part 1 of 4 - 48.0/ 52.0 Points

Question 1 of 50
2..0 Points
A coarse-grained (phaneritic texture) igneous rock formed .


•

A. due to erosion, frost wedging, and weathering


•

B. on the surface of the earth in an explosive eruption


•

C. on the surface of the earth in a quiet (effusive) eruption


•

D. by immense direct pressure and heat


•

E. deep under the surface of the earth




Question 2 of 50
2..0 Points
The Precambrian Era is the time before abundant multicellular life with hard parts evolved. This time
interval represents what percentage of earth’s history?


•

A. 1%


•

B. 99%

, •

C. 88%


•

D. 50%


•

E. 12%




Question 3 of 50
2..0 Points
What evidence did Alfred Wegener use for his hypothesis of continental drift?


•

A. trenches and subduction zones


•

B. similar rocks and fossils on distant continents


•

C. mid-oceanic ridges and the age marine rocks


•

D. paleomagnetic patterns on either side of the mid-oceanic ridge


•

E. earthquake patterns and GPS measurements




Question 4 of 50
2..0 Points
Scientific conclusions are based on .

, •

A. public consensus


•

B. subjective evidence and ancient books


•

C. polling of experts


•

D. only quantitative data


•

E. objective evidence and experiments




Feedback:01.2
Question 5 of 50
2..0 Points
In terms of groundwater resources, what properties make the best aquifer?


•

A. Low porosity and low permeability


•

B. Low porosity and high permeability


•

C. High porosity and high permeability


•

D. High porosity and low permeability

, •

E. High porosity and no permeability




Question 6 of 50
2..0 Points
Folds like anticlines and synclines are most associated with .


•

A. Tectonic shear


•

B. Erosion


•

C. Tectonic compression


•

D. Volcanism


•

E. Tectonic extension




Question 7 of 50
2..0 Points
When the radiometric clock starts ticking in zircon minerals, there is only 100% of the unstable radiometric
parent isotope X and 0% of the stable daughter isotope Y. After testing in a lab millions of years later, there
is 25% of the parent radiometric isotope and 75% of the daughter isotope. How many half lives have
elapsed?


•

A. 3


•

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