ERSC 181 Week 8 Final Exam (Timed and single Access) Questions and Answers 2023

ERSC 181 Week 8 Final Exam (Timed and single Access) Questions and Answers 2023. The primary basis for classifying detrital (clastic) rocks is _______, whereas the primary basis for classifying chemical rocks is ________. Question 6 2 / 2 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? Question 7 2 / 2 points Which of the following surficial processes results in the most poorly sorted sediments? Tectonic extension Erosion Tectonic shear Volcanism Tectonic compression particle size ; mineral composition sorting ; density particle shape ; trace elements rock type ; rounding crystalline structure ; sorting 88% 1% 12% 50% 99% … 3/16 Question 8 2 / 2 points In terms of groundwater resources, what properties make the best aquifer? Question 9 2 / 2 points Where is the top of the asthenosphere closest to the earth's surface? Question 10 2 / 2 points A coarse-grained (phaneritic texture) igneous rock formed _________________. Question 11 2 / 2 points glaciers deep marine wind rivers ocean waves Low porosity and high permeability High porosity and high permeability High porosity and low permeability Low porosity and low permeability High porosity and no permeability Underneath a collision zone Next to a subduction zone Underneath a mid-ocean ridge In the center of continental plates (craton) Underneath a transform fault on the surface of the earth in a quiet (effusive) eruption on the surface of the earth in an explosive eruption by immense direct pressure and heat deep under the surface of the earth due to erosion, frost wedging, and weathering Week 8 Final Exam (timed and single access) … 4/16 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? Question 12 2 / 2 points Which best explains the processes at the mid-oceanic ridge? Question 13 2 / 2 points Which of the following is the most significant natural cause of climate change in the last 2 million years? Question 14 2 / 2 points In the rock cycle, what processes directly link igneous rocks to metamorphic rocks? 2 0.25 0.5 1 3 Plates converge destroying old crust Plates slide past each other destroying old crust Plates diverge creating new crust Plates diverge destroying old crust Plates converge creating new crust Volcanic eruptions Milankovitch cycles Photosynthesis Solar flares Burning of fossil fuels Week 8 Final Exam (timed and single access) … 5/16 Question 15 2 / 2 points Pyroclastic flows are more associated with __________. Question 16 2 / 2 points Shield volcanoes consist of _________. Question 17 2 / 2 points What evidence did Alfred Wegener use for his hypothesis of continental drift? Question 18 2 / 2 points deposition and lithification melting and crystallization compaction and cementation recrystallization by high heat and pressure weathering and erosion