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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Examination 1 Wednesday, October 20th (8:00 - 9:00
PM)
Due Oct 20 at 9pm
Points 88
Questions 41
Available Oct 20 at 8pm - Oct 20 at 9pm about 1 hour
Time Limit 60 Minutes
Instructions
Dear Class:
There are 37 (some multiple questions) regular test questions taken from ESS 101 PowerPoint lecture
material and special readings related to human interactions with geologic processes and materials.
Each regular test question is worth 2 points. The exam is worth 80 points towards your total score out of
400, but will show being out 88 because of the 8 bonus points).
There are also 4 bonus questions worth 2 points each that will be counted towards your total points, but
are extra credit.
The class has earned 5 extra credit participation points for your direct involvement in lecture
discussions. I will add those points after I compile the final midterm 1 grade, which I will make out 80
points.
This quiz was locked Oct 20 at 9pm.
Attempt History
LATEST
Attempt
Time
Score
Attempt 1
56 minutes
88 out of 88
 Correct answers are hidden.
Score for this quiz: 88 out of 88
Submitted Oct 20 at 8:55pm
This attempt took 56 minutes.
Question 1
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2 / 2 pts
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Which of statements below is not correct regarding scientific
observations of the solar system, which support the contention that the
sun and planets formed from a rotating, disk-shaped, nebular dust cloud?
Direct observations of other planetary systems by the Hubble telescope
The planets revolve in a counter-clockwise direction around the sun
The planets are aligned with the Sun's equatorial plane
The planets are not aligned with the Sun's equatorial plane
Most of the planets and their moons rotate on their axis in a counterclockwise direction
Question 2
2 / 2 pts
Meteorites that strike the earth are predominantly composed of
____________?
(Select the 2 correct answers)
Chondritic (silicate minerals)
Sulfide minerals
Iron-Nickel
Oxide minerals
H2O (water)
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Question 3
2 / 2 pts
Which of the following statements are true regarding S-waves as they
propagate through the earth.
(Select the 2 correct answers below)
S waves are slower than P waves
S waves are completely absorbed in the asthenosphere
S waves are absorbed in the liquid outer core
S waves are also described as compression waves
S waves do not refract as they propagate through different density
materials
Question 4
2 / 2 pts
Which of the sources of heat listed below were most important to the
differentiation of the earth into compositional zones?
(3 answers are correct)
solar heating
compressional heating as earth gained mass
radioactive decay of natural radioactive elements
kinetic energy of impacting planetesimals
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
background thermal heating from residual "Big Bang" energy
Question 5
2 / 2 pts
Transform plate boundaries are typically associated with ___________.
convergent margins where the descending plates speeds up during
subduction
collisional margins where plates are being thrust over one another
convergent margins where the descending plates slows down during
subduction
divergent margins where the rate of spreading is different along segments
of the spreading ridge
divergent margins where the rate of spreading is the same along segments
of the spreading ridge
Question 6
2 / 2 pts
Which of the following statements are not correct related to the
compositional zonation of the earth? (There are 2 correct answers)
the earth is not compositionally zoned
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
the densest compositional zones are in the earth's interior
the earth's atmosphere and oceans formed during differentiation and
degassing
the earth became compositionally zoned when the sun first formed
the earth became compositionally zoned when the melting temperature of
iron was exceeded
3 / 3 pts
Question 7
Match the magma/lava type with the appropriate geographic/tectonic
setting where it is found.
Andes Mountains
andesite
Iceland
basalt
interior of Himalaya
granite
Mountains
Question 8
2 / 2 pts
As a source rock partially melts into magma, the magma (melt phase) is
____________ than the residual source rock.
(select the 3 correct answers)
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
higher density
lower melting temperature minerals
more Fe-Mg rich
lower density
more silica rich
Question 9
2 / 2 pts
Observe the image of the porphyritic andesite shown below. Which of the
following statements are correct regarding the minerals comprising the
rock?
(3 answers are correct)
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the fine minerals (c) comprising the matrix likely crystallized above ground
the mineral that crystallizes first has the lowest freezing/melting
temperature
the mineral that crystallizes first also has the highest freezing/melting
temperature
the large white mineral (b) crystallized first
the small black mineral (a) crystallized first
Question 10
2 / 2 pts
Which of the mechanism(s) listed below do not likely drive subduction of
the ocean lithosphere?
(2 answers are correct)
plate sliding
downward pull of subducting plate
convection in the outer core
convection within the continental crust
ridge push
Question 11
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Which of the following statements is not true from the first special reading
on the evolution of the earth's early atmosphere?
most of the Earth’s carbon is sequestered in its atmosphere
solar luminosity has changed over the Earth’s history
life originated more than 4 billion years ago
land dwelling animals could only evolve when the ozone layer formed in
the upper atmosphere
if photosynthesis ceased all the oxygen in the earth’s atmosphere would be
gone <1 million years
Question 12
2 / 2 pts
Which of the following plate motions would not likely occur in the future?
East Africa will diverge apart from Central Africa
The Mediterranean Sea will close as the African Plate converges with the
Eurasian Plate
western California will be displaced northward towards Alaska along a
transform fault
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
The Juan de Fuca spreading ridge will be subducted and Cascade
volcanism will cease
The Isthmus of Panama will close and North America will be connected to
South America
3 / 3 pts
Question 13
Match the structure within the subduction zone with the appropriate
geographic feature in Washington State (shown on the figure below).
Olympic Mountains
Accretionary Wedge
Puget Lowland
Forearc Basin
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Columbia Plateau
Backarc Basin
Question 14
2 / 2 pts
Which of the following statements are correct regarding preservation of
the earth's magnetic field signature within magnetite crystals contained in
a basalt flow erupted and solidified at the earth's North pole today?
(there are 2 correct answers)
magnetite crystals will be arranged haphazardly within the crystallized
basalt flow
the magnetite crystals will have a steep inclination
the magnetite crystals will have a low inclination
the magnetite crystals will possess a normal (north) polarity
the magnetite crystals will possess a reversed (south) polarity
Question 15
2 / 2 pts
Refer to the image below to answer the following question.
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Which seismic wave shadow zone is located between 105° and 140°
angular distance from the epicenter of the earthquake shown above?
surface wave
P wave
S wave
none of the other answers are correct
P and S wave
Question 16
2 / 2 pts
Refer to the image below to answer the following question.
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Which seismic wave(s) is recorded by seismograph located a 155°
angular distance from the epicenter of the above earthquake?
No seismic waves are recorded
surface waves
P waves only
S waves only
P and S waves
Question 17
2 / 2 pts
Where are minerals produced on earth?
(choose the 2 correct answers)
precipitation from and aqueous solution
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
from wood fiber in a tree
crystallization of magma
in a scientific laboratory
in a clam shell
Question 18
2 / 2 pts
What kind of tectonic setting is represented by the San Andreas Fault
zone?
Continent-Continent Collision
Ocean-Ocean Subdution
Ocean-Continent Subduction
Divergent Boundary/Continental Rifting
Transform Boundary
Question 19
2 / 2 pts
The cause of volcanism observed in the Cascades is similar to that of
________.
Hawaii
Andes Mountains
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
the Ural Mountains
the European Alps
Iceland
Question 20
2 / 2 pts
Which continent has been tectonically isolated for the longest period of
geologic time?
Australia
Eurasia (Europe-Asia)
South America
Africa
North America
Question 21
2 / 2 pts
Which of the following statements are true regarding continental collision
tectonic margins?
(select the 3 correct answers)
high mountain ranges will form in the center of continents
granitic plutons will form at depth
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basaltic volcanism will be common
andesitic volcanism will be common
marine sedimentary (ocean floor) rocks will be uplifted
Question 22
2 / 2 pts
Divergent margins typically originate under continents because
__________.
the upper mantle is hotter under continental lithosphere than ocean
lithosphere
the upper mantle is thicker under continental lithosphere
the insulating property of thick continental lithosphere retains more heat
than ocean lithosphere
the upper mantle is squeezed to the surface where continents collide
none of the other answers are correct, as divergent margins only originate
under ocean crust
Question 23
2 / 2 pts
What evidence have geophysicists used to indicate that the core is
metallic and has a liquid component?
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
(There are two correct answers)
a segment of the metallic core has been brought to the surface along deep
kimberlite dikes
the presence of iridium in the outer core
convection in the outer core drives plate tectonics
the presence of the earth’s magnetic field
seismic wave studies, specifically the S-wave shadow zone
Question 24
2 / 2 pts
Which volcanic gas was not added to the earth’s atmosphere during
early differentiation of the planet?
carbon dioxide
water vapor
hydrogen (lost to space)
oxygen
nitrogen
Question 25
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2 / 2 pts
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
Metals generally have _________ melting and boiling points are
_________ conductors of heat and electricity?
high, poor
low, good
none of the other answers are correct
low, poor
high, good
Question 26
2 / 2 pts
In the 2nd special reading it was hypothesized that the first major
dispersal of our ancient human ancestors out of East Africa into Eurasia
may have been caused by:
Flooding of the East Africa Rift Valley as we entered the Cenozoic Ice Age
Falling global sea level
Increasing aridification of the Sahara Desert in northern Africa
ephemeral (short-lived) deep freshwater lakes appearing and disappearing
along the whole length of the East Africa Rift Valley
Closing of the Sinai Peninsula
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Question 27
2 / 2 pts
Water (H2O) melts at a very low temperature because the water
molecules are held together within the crystal structure by ____________
bonds.
strong covalent bonds
strong ionic
strong metallic
weak ionic
weak Van der Waal
Question 28
2 / 2 pts
Why does quartz not exhibit a well-defined 6-sided crystal structure in the
rock granite?
it has the lowest melting/freezing temperature and is the first to crystallize
none of the other answers are corrects, as quartz form 6-sided crystals in
the rock granite
it has the highest melting/freezing temperature and is the last mineral to
crystallize
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it has lowest melting/freezing temperature and is last mineral to crystallize
it has the highest melting/freezing temperature and is the first to crystallize
Question 29
2 / 2 pts
What other mineral did we discussed in lecture that exhibited Van der
Waal bonds in its respective crystal structure (solid form)?
graphite
table salt (halite)
muscovite mica
biotite mica
mercury
Question 30
2 / 2 pts
What are the two most dominant elements comprising the crust and
mantle?
(more than one answer is correct)
iron
nickel
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
aluminum
oxygen
silicon
Question 31
2 / 2 pts
Look at the image below of the mineral pyroxene.
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
What is the ratio of Si:O in the pyroxene mineral structure?
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1:2
1:2.5
1:3
1:2.75
1:4
Question 32
2 / 2 pts
What mineral group provides the cementing agent in concrete?
oxide
silicate
carbonate
sulfide
halide
Question 33
2 / 2 pts
Why does Ca-rich plagioclase develop cleavage planes yet it is a
framework silicate mineral with all its oxygen atoms shared between
tetrahedra?
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this mineral is not a silicate mineral and consists of weak ionic bonds
between the oxygen atoms
this mineral may have an Al atom in its tetrahedra which requires additional
ionic bonds with Ca atoms
the mineral cleaves between covalent bonds separating sheet pairs
this mineral does not cleave
none of the other answers are correct
Question 34
2 / 2 pts
Which of the following statements are correct regarding silicate
tetrahedron? (Choose the 3 correct answers).
it is bonded with van der waal bonds within the tetrahedron
it has a net charge of -4
it is bonded with covalent bonds within the tetrahedron
it is the least common mineral group comprising the crust and mantle
1 silicon atom is bonded with 4 oxygen atoms
Question 35
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2 / 2 pts
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
How do scientists explain the presence of heavy elements, such as iron
and nickel comprising planets in our solar system?
the heavy elements formed during a super nova event during the death of
a pre-existing star
none of the other answers are correct
the heavy elements are remnants from the original Big Bang formation
event of our Universe
heavy elements were produced within the planets during differentiation
heavy metal were produced in our sun and expelled by the solar wind
6 / 6 pts
Question 36
Match the source rock with the magma type produced from partial melting
of that source rock.
partial melt of
asthenosphere
partial melt of subducting
ocean crust and marine
sediments
partial melt of continental
crust
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basaltic magma
andesitic magma
granitic magma
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Question 37
2 / 2 pts
Answer the question below based on the diagram showing partial melting
in the earth mantle (asthenosphere).
Which of the following statements are correct based on the information
shown in the above diagram.
(3 answers are correct)
the rising magma will solidify before it reaches the surface
the rising magma will have a temperature of less than 1100° C when it
reaches the surface
the rising magma will become more liquid as it rises towards the surface
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Examination 1 Wednesday, October 20th (8:00 - 9:00 PM) : ESS 101 B Au 21: Introduction To Geology And Societal Impacts
the rising magma will have temperature of about 1400°C when it reaches
the surface
the rising magma's actual temperature was same as its melting
temperature where it first started melting
Question 38
2 / 2 pts
Bonus Question (2 points)
What is Terry's favorite tree?
bristlecone pine
live oak
ponderosa pine
douglas fir
madrona
Question 39
2 / 2 pts
Bonus Question (2 points)
What crystal system does sphalerite belong to?
cubic
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tetragonal
triclinic
monoclinic
hexagonal
Question 40
2 / 2 pts
Bonus Question (2 points)
What clothing item was most often worn by Terry during his live-stream
lectures?
Sweaters
Linen shirts
Vests
UW Sweatshirts
Tie-Dyed tee shirts
Question 41
2 / 2 pts
Bonus Question (2 points)
How many lectures has Terry missed this quarter?
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1
0
3
2
none of the answers are correct, as I never attend lecture or watch
recorded versions
Quiz Score: 88 out of 88
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