ERSC 181 Final Exam Questions and Answers | American Public University-A coarse-grained (phaneritic texture) igneous rock formed .
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A. due to erosion, frost wedging, and weathering
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B. on the surface of the earth in an explosive eruption
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C. on the surface of the ea...
Question 1 of 50
2..0 Points
A coarse-grained (phaneritic texture) igneous rock formed .
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A. due to erosion, frost wedging, and weathering
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B. on the surface of the earth in an explosive eruption
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C. on the surface of the earth in a quiet (effusive) eruption
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D. by immense direct pressure and heat
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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?
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A. 1%
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B. 99%
, •
C. 88%
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D. 50%
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E. 12%
Question 3 of 50
2..0 Points
What evidence did Alfred Wegener use for his hypothesis of continental drift?
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A. trenches and subduction zones
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B. similar rocks and fossils on distant continents
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C. mid-oceanic ridges and the age marine rocks
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D. paleomagnetic patterns on either side of the mid-oceanic ridge
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E. earthquake patterns and GPS measurements
Question 4 of 50
2..0 Points
Scientific conclusions are based on .
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A. public consensus
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B. subjective evidence and ancient books
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C. polling of experts
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D. only quantitative data
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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?
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A. Low porosity and low permeability
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B. Low porosity and high permeability
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C. High porosity and high permeability
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D. High porosity and low permeability
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E. High porosity and no permeability
Question 6 of 50
2..0 Points
Folds like anticlines and synclines are most associated with .
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A. Tectonic shear
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B. Erosion
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C. Tectonic compression
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D. Volcanism
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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?
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A. 3
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