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Waves, tides and powerful storms that play a large role in
shaping our coastlines are the result of forces that arise from interactions
between which two following systems?

climate system
carbon cycle
biological system
geodynamo system
plate tectonic
system
solar system

IncorrectQuestion 2
0 / 1 pts
The geology of the ocean basins is due to two main
processes; __________________________.
deformation and
plate tectonics
volcanism and
sedimentation
earthquakes and
sedimentation
wind and erosion
weathering and
salinity

IncorrectQuestion 3
0 / 1 pts
In recent decades, more than 70% of the total length of the
worlds beaches have retreated at least 10 cm a year. What is the main cause of this?

It is a natural
result of plate tectonics causing erosion and washing sand away.
It is mainly a
result of the damming of rivers which decreases sediment input.
It is a result of
pollution causing erosion to increase exponentially.
It is due to global
warming and change in weather patterns increasing longshore currents.

IncorrectQuestion 4
0 / 1 pts
Which of the following was the costliest natural disaster in
US history?
Hurricane Irene
Hurricane Sandy
Hurricane Andrew
Hurricane Katrina

Question 5
1 / 1 pts
What is a storm surge?
When a hurricane
makes landfall.
The result of
intensifying winds combining to reach maximum speed.
The combination of a
high tide and a cyclone.
A dome of seawater
formed rising above sea level that floods the land during a hurricane.

Question 6
1 / 1 pts
Oceanographers have determined that sea level has

risen close to 200
cm over the past century.
remained at the same
level for the past century.
risen about 17 cm
over the past century.
lowered about 2 cm
over the past century

Question 7
1 / 1 pts
Which of the following are depositional features along the
shoreline? (choose 2)

spit
barrier island
wave-cut terrace
groin

IncorrectQuestion 8
0 / 1 pts
In mapping the topography of the ocean floor, (choose 2)

our knowledge of the
seafloor is complete; there are no regions we have not mapped.
sonar uses light
waves to map ocean floor depth.
satellites enable us
to map the seafloor by determining the elevation of the ocean surface.
deep seafloor
research involves drilling, permanent observatories, sonar, ROV’s and manned
sumbersibles.

IncorrectQuestion 9
0 / 1 pts
Which of the following is the best way to preserve a beach?

Leave it alone,
building no groins, seawalls, breakwaters on or near them.
Build groins every
10 meters or so.
Build breakwaters to
prevent waves from removing its sand.
Build seawalls to
prevent the longshore current from carrying the sand away.

Question 10
1 / 1 pts
As oceanic crust spreads farther and farther from the ridge:
it is swept clear of
sediments.
it accumulates more
and more volcanic materials.
it keeps the same
amount of sediments..
it accumulates more
and more sediments.

IncorrectQuestion 11
0 / 1 pts
Submarine canyons are formed primarily by:

glaciers when sea
level was much lower.
turbidity currents
eroding the edge of the continental shelf and slope.
rivers when sea
level was much lower.
faulted rift valleys

Question 12
1 / 1 pts
What type of geologic process is most involved in creating
abyssal plains in ocean basins between mid-ocean ridges and the continental
shelf?
deformation
sedimentation
volcanism
longshore currents

IncorrectQuestion 13
0 / 1 pts
Which of the following factors are at work determining the
nature of erosional or depositional features along shorelines?: (choose 3)

The nature of rocks
or sediments at the shoreline.
Heights of the tides
affecting both erosional and depositional features.
Tectonic uplife of
the coastal region leading to depositional coastal forms.
Tectonic subsidence
of the coastal region leading to erosional coastal forms.
Volcanism occurring
at the mid-ocean ridges.
Changes in sea level
affecting the submergence or emergence of a shoreline.

IncorrectQuestion 14
0 / 1 pts
What causes the highest tides to take place every two weeks?
The Sun and Moon are
positioned in line with each other with respect to Earth.
The gravitational
force of the Moon is parallel to prevailing wind directions.
The Sun and Moon are
positioned at right angles to each other with respect to Earth.
Variations in
Earth’s orbit causes an increase in the gravitational force of the Sun.

IncorrectQuestion 15
0 / 1 pts
What process causes temperature to increase and pressure to
decrease as a hurricane forms?
Water evaporates,
heating air in the vicinity of the developing storm.
Water condenses,
heating air in the vicinity of the developing storm.
Water evaporates,
cooling air in the vicinity of the developing storm.
Water condenses,
cooling air in the vicinity of the developing storm.

IncorrectQuestion 16
0 / 1 pts
How can human activity such as construction of a jetty or
groin extending at right angles out into the ocean cause a beach to be
altered? (Choose 2 answers)
The construction of
a jetty or groin does not alter the beach.
The jetty prevents
input of sand on one side, and part of the beach is removed by erosion.
The jetty stops
longshore currents, increasing deposition of sand on one side.
This usually causes
much sand to be eroded away from both sides of the structure.

IncorrectQuestion 17
0 / 1 pts
Longshore currents (choose 3 that correctly apply)

are shallow currents
flowing parallel to shore.
are generated by a
combination of swash and backwash.
are erosional and
also depositional agents.
are deep currents
flowing perpendicular to shore.
have nothing to do
with the formation of rip currents.
are caused mainly by
the interaction between the sun and moon

Question 18
1 / 1 pts
Which coast of the united states has wider continental
margins?
East coast
This is a mystery
and still unknown to scientists.
West coast
Both costs have continental
margins with the same width

Question 19
1 / 1 pts
Which of the following characterizes the West Coast of the
United States? (Choose 3 answers)
There aren’t
trenches close by.
There are trenches
off shore.
This is considered
an active margin.
There aren’t
subduction zones close by.
This is considered a
passive margin.
There are subduction
zones present.

IncorrectQuestion 20
0 / 1 pts
Which of the following characterizes the East Coast of the
United States?
it is considered an active
margin.
It is considered a
passive margin.
There are no
trenches adjacent to the continent.
There are subduction
zones near the continent.
There are no
subduction zones nearby.
There are trenches
present.

IncorrectQuestion 21
0 / 1 pts
Waves carry ______________ from one place to another often
far away place, and the water itself ___________________.
water/can move many
miles together with the wave.
energy;moves right along with the waves.
water/loses energy
as it travels.
energy/moves in a
circle staying basically where it is.

IncorrectQuestion 22
0 / 1 pts
Why are abyssal plains so flat?
Because of years of
accumulating sediments.
Because the volcanic
lava flattens as it spreads out.
Because of the
mid-ocean ridges steadily diverging apart.
Because of the water
continuously eroding it away.

IncorrectQuestion 23
0 / 1 pts
What are neap tides? (Choose TWO answers)

The tides each month
that have maximum displacement.
Tides that are the
result of the sun and moon attracting Earth’s water in perpendicular
directions.
The tides each month
that have the least displacement.
Tides that result
from hurricanes.
Tides that are
caused by the sun and moon being in alignment with the Earth.

PartialQuestion 24
0.33 / 1 pts
Which of the following is correct regarding hurricanes?
(choose 3)

A storm with 145
miles/hour winds and a storm surge of 4 meters would be a category 4 hurricane.
occur most commonly
in the South Pacific.
A storm with 165
miles/hour winds and a storm surge of 5 meters would be a category 3 hurricane.
The deadliest
natural disaster of our time was a cyclone that killed 1/2 a million people in
Bangladesh in 1970.
typically form
during the months of May through August.
The deadliest
natural disaster of our time was Hurricane Katrina.
they form over warm
tropical waters.

IncorrectQuestion 25
0 / 1 pts
Which 3 of the following would be inputs for the sand budget
for a beach? (Choose 3 answers)
Sediments eroded
from backshore cliffs by waves.
Sediments eroded
from upcurrent beach by longshore drift and current.
Sediments
transported to backshore dunes by offshore winds.
Sediments carried
downcurrent by longshore drift.
Sediments brought in
by rivers.
Sediments brought to
deep water by tidal currents and waves.

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