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Exam 1 Practice
OCNG 251-505
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Exam 1 Sample Questions
Earth Origin PowerPoint
Oceanography History PowerPoint
Plate Tectonics PowerPoint A and B
Marine Provinces PowerPoint
Marine Sediments PowerPoint
The magnetic pattern on the seafloor
a. is created by lava emerging at deep sea
trenches
b. is symmetrical about and parallel to midocean ridges
c. has been used to explain the cause of
magnetic reversals
d. confirms the theory of continental drift
e. all of the above
b - symmetrical about and parallel to midocean ridges
The first voyage designed solely to collect
oceanographic data was aboard the
a. Fram
b. Meteor
c. HMS Challenger
d. Pangaea
e. JOIDES Resolution
c - HMS Challenger
The seafloor
a. increases in age from the ridge outward
b. is oldest at the ridge
c. shows no systematic age pattern
a - increases in age from the ridge outward
Which of the following led the first voyage
that circumnavigated the world?
a. Christopher Columbus
b. Vasco da Gama
c. Sir Francis Drake
d. Ferdinand Magellan
e. none of the above
d - Magellan
Which important contribution did Benjamin
Franklin make?
a. organized effort to produce accurate map
of the Gulf Stream
b. described the relationship between coral
reefs and volcanic islands
c. noted that rocks found on land must have
formed in the ocean since they had
seashells in them
d. made important observations about the
chemistry of seawater
a - map of Gulf Stream
Which explorer sought to determine whether
a continent existed near the North Pole?
a. James Cook
b. Fridtjof Nansen
c. Sir John Ross
d. John Cabot
e. Ferdinand Magellan
b - Nansen
The primary evidence for the Big Bang is
a. the presence of many solar systems other
than our own
b. the size of the planets within the solar
system
c. the Milky Way
d. galaxies moving away from a central point
e. the age of the earth and moon
d - galaxies moving away from a central
point
Continental crust is primarily made of
a. clay minerals
b. basalt
c. granite
d. phyllites and schists
e. carbonate sedimentary rocks
c - granite
Oceanic crust is primarily made of
a. clay minerals
b. basalt
c. granite
d. phyllites and schists
e. carbonate sedimentary rocks
b - basalt
Which unique conditions appear to cause
Earth to have oceans?
a. age
b. size
c. distance from Sun
d. presence of the moon
c - distance from the sun
Free oxygen first accumulated in our
atmosphere in significant amounts about
_______ million years ago.
a. 2000
b. 200
c. 20
d. 2
a - 2000
Differences in height between continental
crust and oceanic crust are explained by
a. isostasy
b. continental drift
c. paleomagnetism
d. ophiolites
a - isostasy
Movement of particles as a P wave passes
through can be best described as
a. compression and extension in the
direction of the wave movement
b. compression and extension in a direction
perpendicular to wave movement
c. shear motion perpendicular to the
direction of wave movement
d. shear motion in the direction parallel to
wave movement
a - compression and expansion in the
direction of wave movement
Movement of particles as an S wave passes
through can be best described as
a. compression and extension in the
direction of the wave movement
b. compression and extension in a direction
perpendicular to wave movement
c. shear motion perpendicular to the
direction of wave movement
d. shear motion in the direction parallel to
wave movement
c - shear motion perpendicular to the
direction of wave movement
Which of the following can be found at
convergent plate boundaries on the
seafloor?
a. crest of a mid-ocean ridge
b. offset of a mid-ocean ridge
c. deep sea trenches
d. fracture zones
c - deep sea trenches
Transform faults are _________ while
fracture zones are ____________.
a. seismically active; aseismic
b. aseismic; seismically active
c. convergent; divergent
d. divergent; convergent
a - seismically active; aseismic
Which of the following is characteristic of
oceanic-oceanic convergent plate
boundaries?
a. volcanic island arcs
b. andesitic volcanoes
c. mid-ocean ridges
d. fracture zones
a - volcanic island arcs
Which of the following is characteristic of
oceanic-continental convergent plate
boundaries?
a. volcanic island arcs
b. andesitic volcanoes
c. mid-ocean ridges
d. fracture zones
b - andesitic volcanoes
The gentlest slopes in the ocean can be
found at the
a. continental slope
b. mid-ocean ridges
c. abyssal plains
d. continental shelf
c - abyssal plains
Characteristics of passive continental
margins include all of the following except
a. thick sediment accumulation
b. broad continental shelf
c. deep-sea trench
d. very little volcanic and earthquake activity
c - deep-sea trench
Characteristics of active continental margins
include all of the following except
a. broad continental shelf
b. deep-sea trench
c. chains of islands
d. lots of volcanic and earthquake activity
e. thin sediment accumulation
a - broad continental shelf
Walking away from the shore toward the
middle of the Atlantic Ocean, in what order
would one find the following provinces?
a. slope, rise, shelf, abyssal plain
b. shelf, slope, rise, abyssal plain
c. abyssal plain, rise, slope, shelf
d. abyssal plain, shelf, slope, rise
b - shelf, slope, rise, abyssal plain
Shelf break marks the boundary between
the ________ and the __________.
a. shelf; rise
b. shelf; slope
c. shelf; abyssal plain
d. slope; rise
b - shelf; slope
Sediments which are poorly sorted and
made of a variety of minerals might have
been deposited by
a. a volcanic eruption
b. the wind
c. a river
d. a turbidity current
d - a turbidity current
Which of the following is made of calcium
carbonate?
a. granite
b. basalt
c. diatoms
d. shark's teeth
e. foraminifera
e - foraminifera
Which of the following is made of silica?
a. phosphorites
b. corals
c. diatoms
d. foraminifera
e. coccolithophores
c - diatoms
The most likely place to find abundant
manganese nodules is
a. a continental shelf
b. an abyssal plain far from a continent
c. near the crest of a mid-ocean ridge
d. in the Atlantic Ocean basin
e. all of the above have abundant nodules
b - an abyssal plain far from a continent
Sediments derived from preexisting rocks
are called
a. lithogenous
b. biogenous
c. hydrogenous
d. cosmogenous
a - lithogenous
Sediments produced by plants and animals
in the sea are called
a. lithogenous
b. biogenous
c. hydrogenous
d. cosmogenous
b - biogenous
Sediments produced as a result of chemical
reactions in seawater are called
a. lithogenous
b. biogenous
c. hydrogenous
d. cosmogenous
c - hydrogenous
All of the following are terrestrial sediments
except
a. clays
b. beach sand
c. diatom ooze
d. glacial deposits
e. volcanogenic particles
c - diatom ooze
Biogenous sediments might be composed of
all of the following except
a. coralline sands
b. diatoms
c. coccolithophores
d. foraminifera
e. red clay
e - red clay