ERSC 181 Week 8 Final Exam 2023 – Review Questions and Answers

ERSC 181 Week 8 Final Exam 2023 – Review Questions and Answers. Pyroclastic flows are more associated with __________. ocean hot spots stratovolcanoes shield volcanoes flood basalts cinder cones Question 2 2/2 points In the rock cycle, what processes directly link igneous rocks to metamorphic rocks? compaction and cementation melting and crystallization deposition and lithification recrystallization by high heat and pressure weathering and erosion Question 3 2/2 points The primary basis for classifying detrital (clastic) rocks is _______, whereas the primary basis for classifying chemical rocks is ________. particle size ; mineral composition rock type ; rounding sorting ; density particle shape ; trace elements crystalline structure ; sorting Question 4 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? 99% 12% 88% 1% 50% Question 5 2/2 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? 1 0.25 3 2 0.5 Question 6 2/2 points In the scientific method, a hypothesis is _______, and a theory is _________. an educated guess ; a law that has been universally accepted by the scientific community an objective observation ; an idea that hasn't been proven an educated guess ; a tentative untested explanation a tentative untested explanation ; well tested and widely accepted explanation a tentative untested explanation ; a law that has been universally accepted by the scientific commuQuestion 7 2/2 points In terms of groundwater resources, what properties make the best aquifer? High porosity and low permeability Low porosity and low permeability High porosity and no permeability Low porosity and high permeability High porosity and high permeability