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DSE FINAL/172 QUESTIONS AND ANSWERS (A+)
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DSE FINAL/172QUESTIONS AND
ANSWERS (A+)
In the mesopelagic zone most fishes have:
A. Large eyes
B. Small eyes
C. Use bioluminescence to attract mates, find
food, and escape predation
D. All of the above
E. A and C - √Answer>E. A and C
-France, Russia, and Poland have contracts for
deep sea mining in the:
A. Mariana Trench
B. East Pacific Rise
C. Mid Atlantic Ridge
D. Indian Ridge - √Answer>C. Mid Atlantic Ridge
-The non-vent deep sea
A. Is sometimes flat, with volcanic seamounts
B. Is made up of soft clay
C. Is kilometers deep with foraminiferan skeletons
D. Is kilometers deep with diatom and radiolarian
skeletons
,E. All of the above - √Answer>E. All of the above
-Which of the following statements is FALSE?
A. The deepest zone in the oceans is the Bathyal
zone at between 1000 and 4000 meters
B. The temperature in the abyssalpelagic zone is
generally less than 4ºC
C. The mesopelagic zone is sometimes referred to
as the twilight zone as there is generally some
amount of light
D. The hadal zone is in complete darkness -
√Answer>A. The deepest zone in the oceans is
the Bathyal zone at between 1000 and 4000
meters
-Two directions that would advance deep-sea
stewardship are __________ and __________
___________ - √Answer>Research and
Collaborative governance
-How long does it take for hydrothermal fluid to go
from the reaction zone to the surface (ocean
floor)?
A. Two days
B. Five years
C. One hour
D. Twenty seconds
E. One month - √Answer>C. One hour
,-Deep-sea water
A. originates in the North Atlantic
B. is extremely cold
C. mixes with circumpolar Antarctic bottom water
D. migrates south and spreads out into the Pacific
and Indian oceans
E. all of the above - √Answer>E. all of the above
-Which of the following facts about the physical
environment in the non-vent deep sea is FALSE?
A. Below 300m light is inadequate to support
photosynthesis
B. Pressure increases by 1atm for each 100m
C. Temperature decreases with depth, below
1000m temperature is <1ºC
D. Deep sea water retains oxygen because
demand for oxygen by deep sea organisms is
small
E. There is limited food supply - √Answer>B.
Pressure increases by 1atm for each 100m
-What is the most abundant cation in seawater
and hydrothermal fluids?
A. magnesium
B. sodium
C. calcium
, D. hydrogen sulfinde - √Answer>B. sodium
-Which of the following statements is False?
A. White smoker fluids are cooler than black
smoker fluids
B. White and black smoker chimneys can collapse
easily
C. Temperature at white smokers are <90ºF
D. At lost city chimneys are made up of calcium
carbonate
E. The pH at white and black smokers is lower
than the pH at Lost City - √Answer>C.
Temperature at white smokers are <90ºF
-Which of the following statements is FALSE?
During chimney formation and destruction:
A. Calcium sulfate precipitates at TºC >150ºC
B. Calcium sulfate starts dissolving at TºC <150ºC
C. Anhydrite walls insulate and isolate
hydrothermal fluids from the surrounding seawater
D. Active chimneys fortified with SiO2, BaSO4 of
CaCO3 can be knocked over by minor earthquake
tremors - √Answer>D. Active chimneys fortified
with SiO2, BaSO4 of CaCO3 can be knocked over
by minor earthquake tremors
-Which of the following statements is FALSE?
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