Week 8 Final Exam (timed and single access) Overall Grade (highest attempt): 96 / 100 - 96 % Question 1 2/2 points 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 process...
Question 1 2/2 points
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 community
Question 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
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