Name: 
 

NOSB Physical Ocenography Practice



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which of the following is not a type of an estuary
a.
fjord
d.
river bed
b.
well-mixed
e.
bar-built
c.
coastal plain
 

 2. 

Salt marshes are associated with all of the following except
a.
brown kelp
d.
peat moss
b.
lots of decomposing organic material
e.
salt tollerant plants
c.
regular inundation by salt water
 

 3. 

Mangroves have to be able to survive
a.
excess oxygen in the soil
c.
low water salinity
b.
high soil pH
d.
little oxygen in the soil
 

 4. 

The benefits that magrove trees may give to the environment includes all of the following except
a.
water filtration
c.
food and habitat for lots of species
b.
production of freshwater from their roots
d.
soil stability and flood control
 

 5. 

In an estuary which of the following trends is most likely as you go down in depth
a.
increasing salinity
c.
increasing pH
b.
increasing teacher
d.
decreasing salinity
 

 6. 

The main chemical component of coral reefs (as produced by the coraline organism)
a.
calcium sulfate
c.
calcium carbonate
b.
iron sulfide
d.
sodium hydroxide
 

 7. 

The reef seen below is
mc007-1.jpg
a.
a fringing reef
c.
an atoll
b.
a barriar reef
d.
a lagoon reef
 

 8. 

The living portion of the coral organism seen below is called a
mc008-1.jpg
a.
algae
c.
sun star
b.
polyp
d.
anemone
 

 9. 

The depth to which coral can grow is largely dependent upon
a.
water salinity
c.
water clarity
b.
water temperature
d.
water in the food column
 

 10. 

Corals do not grown near the mouths of rivers in the tropics because
a.
sediment from rivers reduces water clarity
c.
warm river water increases temperature
b.
freshwater from rivers decrease salinity to below 30 ppt
d.
both A and B are true but not C
 

 11. 

While coral reefs in the Pacific are continuously growing the islands they often surround are
a.
shrinking
c.
growing
b.
expanding
d.
subsiding
 

 12. 

Coral bleaching occurs when coral experience
a.
physical stress
c.
higher than normal temperatures
b.
excess solar iradiance
d.
all of the above
 

 13. 

Manatees and Dugongs each primarily
a.
coral polyps
c.
brown kep
b.
see grass
d.
shrimp
 

 14. 

Coral reefs grow in communities with
a.
soft bottoms
c.
large tidal changes
b.
hard bottoms
d.
large amounts of river run off
 

 15. 

Muscles are examples of
a.
infauna
c.
suspension feeders
b.
deposit feeders
d.
predators
 

 16. 

The portion of an algae that holds it to the bottom is
a.
blade
c.
root
b.
stipe
d.
holdfast
 

 17. 

Which of the following statements about biogenous sediment is true
a.
much of biogenous sediements are formed from calcium carbonate
c.
biogenous sediments primarily arrive in the ocean via freshwater rivers
b.
most marine sediments are biogenous
d.
biogenous sediments are the results of continental erosion
 

 18. 

Which of the following statements about lithogenous sediment is true
a.
they tend to dissolve at deeper depths
c.
they are the remains of plankton and other living organisms
b.
they are primarily produced in the oceans surface waters
d.
most marine sediments are lithogenous
 

 19. 

Oceanic sea grasses
a.
have a stipe, blades, and a holdfast
c.
have floats to maintaine bouyancy
b.
have roots, leaves, and shoots like terestrial plants
d.
have stiff woody trunks and branches to keep them upright in the current
 

 20. 

Brown kelp
a.
is the fastest growing photosynthetic organism on earth
c.
evolved from and are related to land based plants
b.
grows is deep muddy sediment
d.
grows in deep ocean trenches
 

 21. 

An urchin barren
a.
describes a kelp forest community with no sea urchins
c.
occurs when sea otters eat too many sea urchins
b.
may occur when sea otters are removed from a kelp forest ecosystem
d.
will have a higher species diversity than a kelp forest that is not an urchin barren
 

 22. 

The inn-keeper worm below is a good example of
mc022-1.jpg
a.
epifauna
d.
a suspension feeder
b.
infauna
e.
both b and c are true
c.
a deposit feeder
 

 23. 

Red and blue mussels are commonly found in the same intertidal communities.  One mussel exists in the higher intertidal area.  Another species exists in the lower.  The one in the higher (blue mussels) grows slower than the ones in the lower intertidal (red mussels).  Both have free-swimming larval forms that swim around until they are ready to settle down.  Select the most logical hypothesis for this observation. 
a.
Blue mussles are more nutrient tolerant
c.
Blue mussles are more tollerant of drying out
b.
Red mussles will out-compete blue mussles when they grow together
d.
both c and b are logical hypotheses
 

 24. 

The acorn barnacle is a good example of a:
mc024-1.jpg
a.
epifauna
d.
suspension feeder
b.
infauna
e.
both b and d are true
c.
deposit feeder
 

 25. 

The black oystercatcher likes to feed primarily
mc025-1.jpg
a.
in the open ocean surface
c.
in the epipelagic
b.
in the areas exposed at low tide
d.
in the splash zone
 

 26. 

mc026-1.jpg
The type of of sediments in the microscope image above is
a.
biogenous (once living plankton)                 
c.
cosogenous (from outer space)
b.
lithagenous (land based erosion)
d.
hydrogenous (precipitated at deep sea vents)
 

 27. 

mc027-1.jpg
In Grand Island, LA sea level can be seen as
a.
rising several meters per year
c.
dropping several meters per year
b.
rising several millimeters per year
d.
dropping several millimeters per year
 
 
nar001-1.jpg
 

 28. 

During 2015, the Phoenix Islands saw significant coral bleaching.  The primary cause of this bleaching was
a.
air exposure
c.
a hurricane
b.
abnormally low tides
d.
extremely high sea surface temperatures
 

 29. 

During which period in 2015, were Phoenix Islands’ coral reefs least likely to experience bleaching
a.
January-March
c.
June-September
b.
March-June
d.
September-December
 

 30. 

The dark blue line represents recorded sea surface temperatures.  In November and December of 2016 sea surface temperatures were close to monlthly mean (i.e. normal temperatures.)  Which of the following is true about sea surface temperatures in 2015?
a.
Sea surface temperatures were above the montly mean (i.e. above normal) in the spring of 2015.
c.
Sea surface temperatures were above the montly mean (i.e. above normal) in the fall of 2015.
b.
Sea surface temperatures were above the montly mean (i.e. above normal) in the summer of 2015.
d.
Sea surface temperatures were above the montly mean (i.e. above normal) all of  2015.
 

 31. 

Reef building coral’s have polyp animal’s that live symbiotically with
a.
calcium carbonate rocks
c.
sharks
b.
zooxanthellae algae
d.
anemone fish
 

 32. 

Below we see a
mc032-1.jpg
a.
a folious coral
c.
a tabular coral
b.
a branching coral
d.
a massive coral
 

 33. 

Below we see a
mc033-1.jpg
a.
a folious coral
c.
a tabular coral
b.
a branching coral
d.
a massive coral
 

 34. 

Parrot fish use their large teeth to

mc034-1.jpg
a.
defend themselves against sharks
c.
eat spiny sea urchins
b.
eat algae
d.
eat coral
 

 35. 

According to Darwin’s theory of atoll formation, the island that this coral reef formed around...
mc035-1.jpg
a.
has gradually subsided into the sea while the coral reef has continued to grow up
c.
has remained beneath the coral and never full emerged
b.
exploded during a volcanic eruption
d.
was abducted by aliens.
 

 36. 

Normal conditions in the Eastern Tropical Pacific(near Peru) include which of the following
a.
heavy rains
c.
strong East blowing winds
b.
dry, cold sea surface temperatures
d.
warm tropical weather
 

 37. 

The first sign of a strong El Nino is
a.
the rise of SST’s in the Western Pacific
c.
weakening of west blowing tropical winds
b.
Rainfall off the cost of Australia
d.
torrential rainfall in the deserts of South America
 

 38. 

The TAO’s buoy network is designed to track
a.
weather
c.
tsunami’s
b.
waves
d.
El Nino’s
 

 39. 

Buoy’s are very useful tools for oceanographers.  Which of the following can not be measured by a buoy
a.
sea surface temperature
d.
wind direction and speed
b.
wave height
e.
all of the above can be measured by a buoy
c.
current direction and speed
 

 40. 

After charting sea surface temperatures at 0 degrees North, 110 degrees West for 30 days, a student creates the following graph
mc040-1.jpg
The student concludes...
a.
a La Nina is developing
c.
SST’s indicate an El Nino is developing but they would need to check other conditions to be sure
b.
an El Nino is developing
d.
global warming is raising SST at this location
 

 41. 

mc041-1.jpg

The strongest El nino’s were recorded
a.
in 1981 and 1988
c.
in 1981 and 1998
b.
in 1983 and 1998
d.
in 1983 and 1988
 

 42. 

mc042-1.jpg
The most recent strong El Nino occured during in
a.
1991
c.
2008
b.
1997
d.
2010
 
 
Types of Estuaries

Fjords are valleys that have been cut deeper by moving glaciers and then invaded by the sea. They have a shallow barrier at their mouth that limits water exchange between the deeper waters of the fjord and the sea. They are narrow with steep sides and usually straight and long. Fjords are found in areas that have been covered by glaciers.

Tectonic Estuaries

Tectonic estuaries are created when shifting tectonic plates cause some areas to rise and others to sink.  A tectonic estuary forms when the sea fills in the "hole" or basin that was formed by the sinking land.

Bar-Built Estuaries

Bar-built estuaries are formed when sandbars build up along the coastline. These sand bars partially cut off the waters behind them from the sea. Bar-built estuaries are usually shallow, with reduced tidal action.

Coastal Plain Estuaries

Coastal plain estuaries were formed at the end of the last ice age. As the ice melted and the waters warmed, sea level rose. The rising seas invaded low-lying coastal river valleys. These valleys are usually shallow with gentle sloping bottoms. Their depth increases toward the river's mouth.
 

 43. 

Chesepeak bay has no glaciers, is in an area of little tectonic activity, and is primarily shallow.

What type of estuary is Chesepeak Bay?
mc043-1.jpg
a.
fiord
c.
bar-built
b.
tectonic
d.
coastal plain
 

 44. 

Lituya Bay has steep mountains surrounding it, with several glaciers at its end.  It is known for its unusual depth, and the largest waves measured by humans.

What type of estuary is Lituya Bay?
mc044-1.jpg
a.
fiord
c.
bar-built
b.
tectonic
d.
coastal plain
 

 45. 

Pamlico Sound, North Carolina is shaped by a series of low lying sand bar islands that protect the waters behind it form the forces of the open ocean. The waters are shallow and tides are small.
What type of estuary is Pamlico Sound?
mc045-1.jpg
a.
fiord
c.
bar-built
b.
tectonic
d.
coastal plain
 

 46. 

Salt wedge estuaries occur when the mouth of a river flows directly into salt water. The circulation is controlled by the river that pushes back the seawater. This creates a sharp boundary that separates an upper less salty layer from an intruding wedge-shaped salty bottom layer.  What is the most likely salinity profile of a salt wedge estuary
a.
salty on the top, fresh on the bottom
c.
salty on the bottom, and fresh on the top
b.
salty in the middle, fresh on the top and on the bottom
d.
well mixed salinity throughout the estuary
 
 
Below is a salinity profile for Lower Cook Inlet.  This data was collected in June.
nar003-1.jpg
 

 47. 

Based on the salinity profile from June, you are most likely to find the saltiest water
a.
in the top 10 meters
c.
between 50 and 100 meters
b.
between 10 and 50 meters
d.
in waters deeper than 100 meters
 

 48. 

What types of factors would have an impact on the depth of the freshwater layer in Cook Inlet Estuary in June.
a.
Higher than normal snow fall the winter before
c.
stronger tidal movements during spring tides
b.
Higher than normal temperatures
d.
both A and B would increase the amount ice and snowmelt and the depth of the freshwater layer
 

 49. 

mc049-1.jpg

As the saildrone got closer to land in the Norton Sound Estuary, it recorded
a.
lower temperatures
c.
higher temperatures
b.
lower salinity
d.
higher salinity
 

 50. 

A buoy monitors a current that predominanty moves from the south to the north.  The day you look at the bouy it is measuring a northerly current of 5km/h.  At 100 meters of depth it is measuring a current of 3km/h to moving towards the northeast.  At 200 meters of depth it shows a current at 1km/hr moving towards the east.  This buoy is seeing the effects of
a.
El Nino
c.
Ekman transport
b.
global climate change
d.
an oceanic gyre
 

 51. 

Thermohaline circulation refers to differences in water density created by
a.
temperature
d.
plankton abundance
b.
salinity
e.
both a and b
c.
acidity
 

 52. 

Which of the following creates the “ocean oasis” of Baja California’s Sea of Cortez
a.
cold water currents
d.
high levels of nutrients
b.
winds blowing off shore
e.
all of the above
c.
lots of sunlight
 

 53. 

If you look at a satelite map showing ocean color, which color is likely to indicate high levels of the plankton
a.
green
c.
yellow
b.
blue or purple
d.
orange or red
 

 54. 

Warm water currents
a.
move from the tropics towards the poles
c.
move from east to west
b.
are always warmer than 70 degrees farenheight
d.
ove from the poles to tropics
 

 55. 

The gulf stream current
a.
warms the coast of Europe
d.
is a cold water current
b.
begins off the coast of Florida
e.
both A and B
c.
can be found in the Gulf of Mexico
 

 56. 

The coriolis force
a.
results in large circular currents called oceanic gyres
c.
brings nutrients to the surface from the deep sea
b.
results from the rotation of the moon around the sun
d.
tends to move water in a counter-clockwise (to the left) direction in the northern hemisphere
 

 57. 

At ______ degrees the Earth is exactly half as thick as it is at the equator
a.
45 degrees north
d.
60 degrees west
b.
60 degrees north
e.
180 degrees east of west
c.
45 degrees west
 

 58. 

Primary production in the ocean has to do with the growth of
a.
fish
c.
phytoplankton
b.
zooplankton
d.
plants
 

 59. 

Wind:
a.
Is movement of air from an area of low pressure to one high pressure.
d.
Is named for the direction towards which the wind blows
b.
Is not deflected by Coriolis
e.
All of the above.
c.
Is movement of air along a pressure gradient.
 

 60. 

Coriolis deflection:
a.
Increases poleward.
d.
Does not occur along the equator.
b.
Even influences movement parallel to latitude.
e.
All of the above.
c.
Is neuutralized in geostrophic flow.
 

 61. 

The major convection cells in the atmosphere:
a.
Consist of surface winds and opposing high altitude winds that blow from areas of lower pressure in both the northern and southern hemispheres.
d.
Create alternating climate zone with a moist climate in areas of high pressure, such as the doldrums and polar fronts, and dry climate in areas of low pressure, such as the horse latitudes and poles.
b.
Are separated by zones of alternation high pressure and low pressure with a high pressure located at the doldrums, low pressure at the horse latitudes, high pressure at the polar front and low pressure at the poles.
e.
Are directly responsible for the major winds on Earth and indirectly responsible for the ocean currents, gyres, counter currents and undercurrents.
c.
Circulate in the same direction in the northern and southern hemispheres.
 

 62. 

Wind-driven ocean currents:
a.
Are mainly westerly currents between 0o and 30o, easterly currents between 30o and 50o and wasterly currents between 90o and 50o.
d.
Meander and for rings along the equator.
b.
Flow opposite to the major winds as demonstrated by the Eckman spiral and Eckman transport
e.
All of the above.
c.
Are not influenced by Coriolis and can flow in any direction without deflection.
 

 63. 

Eckman Transport:
a.
Produces the counter currents.
c.
Implies that a northerly wind will produce downwelling on the east side of a continent in the southern hemisphere.
b.
Implies that wind-driven currents mainly tend to flow parallel to the lines of latitude.
d.
Produces Langmuir circulation if the wind is suffiiciently strong.
 

 64. 

Geostrophic flow:
a.
Is only significant in the gyres.
d.
Results from a balance between deflection and an opposing pressure gradient.
b.
Is directly respinsible for the formation of warm-water and cold-water rings.
e.
All of the above.
c.
Produces thermohaline circulation.
 

 65. 

Equatorial counter currents and undercurrents are similar in that both:
a.
Are easterly currents.
d.
Are located between gyres.
b.
Flow down pressure gradients.
e.
All of the above.
c.
Are influenced by coriolis.
 

 66. 

Thermohaline circulation refers to differences in water density created by
a.
temperature
d.
plankton abundance
b.
salinity
e.
both a and b
c.
acidity
 

 67. 

Cold water currents
a.
move from the tropics towards the poles
c.
move from east to west
b.
are always warmer than 70 degrees farenheight
d.
move from the poles towards the tropics
 

 68. 

The gulf stream current
a.
warms the coast of Europe
d.
is a cold water current
b.
begins off the coast of Florida
e.
both A and B
c.
can be found in the Gulf of Mexico
 

 69. 

The waters of the Sea of Cortez, off the Southern Baja Peninsula are so rich with plankton for which of the following reasons (select the best answer.)
a.
offshore blowing wind forces cold nutrient rich waters to come to the surface where it meets abundance sunlight
c.
the dry climate makes for a desert oasis
b.
offshore blowing wind forces warm nutrient rich waters to come to the surface where it meets cool skiest
d.
the presence of whales creates a lot of whale “fertilizer.”
 

 70. 

A buoy monitors a current that predominanty moves from the south to the north.  The day you look at the bouy it is measuring a northerly current of 5km/h.  At 100 meters of depth it is measuring a current of 3km/h to moving towards the northeast.  At 200 meters of depth it shows a current at 1km/hr moving towards the east.  This buoy is seeing the effects of
a.
El Nino
c.
Ekman transport
b.
global climate change
d.
an oceanic gyre
 

 71. 

Wind blowing from the north along a western coastline will cause water to be pushed out to sea.  To replace the water moving offshore waters are brought to the surface from the ocean bottom. These waters are normally very cold and rich in nutrients.   This is a description of
a.
Ekman Transport
c.
Coastal upwelling
b.
The Coriolis Effect
d.
Equitorial downwelling
 

 72. 

mc072-1.jpg
The coriolis force
a.
results in large circular currents called oceanic gyres
c.
brings nutrients to the surface from the deep sea
b.
results from the rotation of the moon around the sun
d.
tends to move water in a counter-clockwise (to the left) direction in the northern hemisphere
 

 73. 

Surface currents are most directly related to
a.
the blowing of the wind
c.
the evaporation of water from the surface
b.
the heating of water by the sun
d.
the rotation of the Earth around the sun
 

 74. 

Primary production in the ocean has to do with the growth of
a.
fish
c.
phytoplankton
b.
zooplankton
d.
plants
 

 75. 

Surface currents are most directly related to
a.
the blowing of the wind
c.
the evaporation of water from the surface
b.
the heating of water by the sun
d.
the rotation of the Earth around the sun
 

 76. 

Buoy Data from 100 meters of depth
parameter           min     mean      max       sd     days
speed (cm/sec)      1.49    39.03   106.05    18.84    539.0
dir (deg true)      0.12    99.00   359.99   112.57    539.0
u (cm/sec)        -59.49    18.39    76.36    22.86    539.0
v (cm/sec)        -34.10    26.60    99.28    17.61    539.0

Buoy Data from 200 meters of depth
parameter           min     mean      max       sd     days
speed (cm/sec)      1.33    33.32    68.81    11.88    444.5
dir (deg true)      0.54   103.71   358.80   116.29    444.5
u (cm/sec)        -55.91    12.81    65.94    20.14    444.5
v (cm/sec)        -39.18    22.31    56.31    13.56    444.5

Buoy Data from 400 meters of depth
parameter         min     mean      max       sd     days
speed (cm/sec)      1.55    16.82    39.42     6.72    616.5
dir (deg true)      0.67   166.24   359.91   134.43    616.5
u (cm/sec)        -35.91     2.11    34.31    12.75    616.5
v (cm/sec)        -27.24     9.58    32.06     8.31    616.5


Wind blowing on the surface of the ocean has the greatest effect on the surface. However, for the lower layers of the ocean to move slower.  In the northern hemisphere water is also deflected to the right.  This shift to the right can best be seen in the
a.
shift in the mean direction at 400 m
c.
speed at 400 m
b.
shift in the mean direction at 100 m
d.
speed at 100 m
 

 77. 

mc077-1.jpg
What type of plankton do you see above
a.
a diatom, a primary producer
c.
a green algae, a primary consumer
b.
a copepod, a primary consumer
d.
a mycid shrimp, a primary consumer
 

 78. 

mc078-1.jpg
What type of plankton do you see above
a.
a diatom, a primary producer
c.
a green algae, a primary consumer
b.
a copepod, a primary consumer
d.
a mycid shrimp, a primary consumer
 

 79. 

mc079-1.jpg
Take some nutrients add some sun light and a few plankton, and you get a
a.
hurricane
c.
surface current
b.
ekman spiral
d.
plankton bloom
 

 80. 

Offshore blowing wind, causes the movement of cold water upward from the deep ocean that is caused by wind.
a.
coastal upwelling
c.
surface current
b.
Ekman spiral
d.
plankton bloom
 

 81. 

mc081-1.jpg
The diagram above is a visual description of
a.
coastal upwelling
c.
surface currents
b.
ekman spiral
d.
plankton blooms
 

 82. 

mc082-1.jpg
The above data was taken from a weather station at the Bermuda Airport on October 13, 2016 as Hurricane Nichole went past.  Examine the change in barometric pressure, wind speed, and wind direction. What happend around between 12:00 noon and 1:00PM at the Bermuda Airport?
a.
Hurricane Nichole reveresed directions
c.
The storm surge from the hurricane came ashore.
b.
The eye of the hurricane passed overhead.
d.
The eye of the hurricane collapsed.
 

 83. 

mc083-1.jpg
This guy is a larval barnacle, but can also be described as a...
a.
diatom
c.
phytoplankton
b.
cilliate
d.
zooplankton
 

 84. 

mc084-1.jpg

A pteropod or sea butterfly is a type of ________ plankton with a body made primarily from.
a.
phytoplankton
c.
jelly
b.
copepod
d.
cilliated
 

 85. 

mc085-1.jpg
Look at the map above for the eastern tropical Pacific ocean.  This type of map is useful for showing.
a.
precise SST along a line of latitude
c.
precise salinity along a line of latitude
b.
SST and temperature anomoly patterns over large areas
d.
salinity and salinity anomoly patterns over large areas
 

 86. 

mc086-1.jpg
    
    
Select the best explanation for the differences in chlorophyll concentration between December 2015 and December 1999.

a.
La Nina conditions suppress upwelling in the eastern tropical Pacific leading to larger plankton blooms.
c.
El Nino conditions increase upwelling in the eastern tropical Pacific leading to larger plankton blooms.
b.
La Nina conditions increase upwelling in the eastern tropical Pacific leading to larger plankton blooms.
d.
El Nino conditions increase  upwelling in the eastern tropical Pacific leading to smaller plankton blooms.
 

 87. 

Which of the following factors had the most significant affect on the number of species living in most North Pacific Inter-tidal community.
a.
predators like sea stars
c.
the latitude
b.
current movements
d.
the longitude
 

 88. 


mc088-1.jpg
The spray zone is submerged only a few hours a month during the highest points of the spring tides.  The subtidal zone is fully submerged during all tidal movements.  How often each layer inbetween these two is submerged depends upon the tidal cycle of that area.

Where would the least variation in temperature and salinity within a tidal community would be found:
a.
spray (or splash) zone
c.
lower inter-tidal zone
b.
upper inter-tidal zone
d.
sub tidal zone
 

 89. 

mc089-1.jpg

The picture above shows a bore tide in Turnagain Arm.  Select the best description of a bore tide.
a.
The leading edge of the incoming tide forms a wall of water or a wave as it pushes against the outgoing current of a narrow inlet.
c.
The inertia of the Earth’s waters form all incoming tides into waves.
b.
The incoming tide forms a plunging wave as it reaches the shallows of a narrow inlet.
d.
The rotational movement in the North Pacific Gyre creates waves as it hits the Alaska coastline.
 

 90. 

Here is a location on the East Coast.  The highest and lowest tide of this week occur on which day.

11/23/2015     
5:03 AM EST      2.36 ft     
5:20 PM EST      2.03 ft     
11:25 AM EST      -0.05 ft     
11:33 PM EST      -0.24 ft     

11/24/2015     
5:55 AM EST      2.48 ft     
6:12 PM EST      2.02 ft                 
12:23 PM EST      -0.12 ft     

11/25/2015     
6:46 AM EST      2.54 ft     
7:04 PM EST      1.99 ft     
12:27 AM EST      -0.28 ft     
1:19 PM EST      -0.17 ft     

11/26/2015     
7:36 AM EST      2.55 ft     
7:55 PM EST      1.95 ft     
1:19 AM EST      -0.30 ft     
2:09 PM EST      -0.19 ft     

11/27/2015     
8:25 AM EST      2.50 ft     
8:43 PM EST      1.88 ft     
2:07 AM EST      -0.27 ft     
2:56 PM EST      -0.17 ft     
a.
11/23
d.
11/26
b.
11/24
e.
11/27
c.
11/25
 
 
nar004-1.jpg
 

 91. 

In Anchorage, Spring (or flood) tides occur
a.
in April
c.
just before a first quarter moon
b.
just after a full moon
d.
just before a one half moon
 

 92. 

Based on the tidal data given Anchorage has
a.
diurnal
d.
spring tides but no neap tides
b.
semi-diurnal
e.
neap tides but not spring tides
c.
mixed tides
 

 93. 

The tidal range for Anchorage, AK is
a.
35 meters
c.
more than 30 feet
b.
less than 30 feet
d.
the smallest of any location on the planet
 
 
nar005-1.jpg
 

 94. 

In November of 2015 the new moon occurs
a.
November 10
c.
November 25
b.
November 11
d.
November 26
 

 95. 

On November 18th, 2015, the northern hemisphere was about to see?
a.
a full moon  that is waning towards a three quarter moon
c.
a new moon that is waxing towards a first quarter moon
b.
a first quarter moon that is waxing  towards a full moon
d.
a crescent moon that is disappearing
 

 96. 

mc096-1.jpg
Examine the map above.  Which types of tides are least common around the world
a.
semidiurnal
c.
mixed semidiurnal
b.
diurnal
d.
mixed diurnal
 

 97. 

Here is the picture of the tides for one day in Nome, AK.  What kinds of tides does Nome have?
mc097-1.jpg
a.
semidiurnal
c.
neap tides
b.
diurnal
d.
spring tides
 

 98. 

Which of the following factors would not affect the number of species living in a North Pacific Inter-tidal community.
a.
predators like sea stars
c.
the strength of tidal chances
b.
wave action
d.
all of these would have an impact
 

 99. 

The greatest ranges in temperature and salinity within a tidal community would be found in:
a.
splash zone
c.
lower inter-tidal zone
b.
upper inter-tidal zone
d.
sub tidal zone
 

 100. 

Which of the following species are least likely to be found in the lower intertidal areas (nearest the low tide line)
a.
Periwinkle snails
c.
Razor clams
b.
Green anemones
d.
Blue mussels
 

 101. 

Which of the following is not involved with the size of the tides in a given area of the coast
a.
sun
c.
shape of the coastline
b.
moon
d.
large scale current movement
 

 102. 

______________ is the strongest single force in controling the ebb and flow of the tides.
a.
sun’s gravity
c.
coastline shape
b.
the moon’s gravity
d.
large scale oceanic currents
 

 103. 

A neap tide is
a.
the highest highs and the lowest low tides of the month
c.
more moderate tides that occur during the one quarter and three quarter moon
b.
most common in winter
d.
most common in summer
 

 104. 

A spring tide is
a.
the highest highs and the lowest low tides of the month
c.
more moderate tides that occur during the one quarter and three quarter moon
b.
a tide occuring during the month of april
d.
uncommon in winter
 

 105. 

Barnacles thrive in the higher portions of the tidal zone because
a.
they can seal their shells to prevent  water loss
c.
there is less competition for space in the upper intertidal
b.
they have a very slow metabolism
d.
all of the above are true
 

 106. 

When exposed to the air as water receeds, algae in a tide pool tends to
a.
die
c.
dry up
b.
fold over its blades to prevent water lose
d.
move lower so that it can stay submerged
 

 107. 

The lowest tide in Anchorage the week of Feb 1, 2009...

02/01/2009 Sun 05:01AM LST 3.0  L  10:40AM LST 29.5 H  05:48PM LST 1.8  L  11:18PM LST 25.7 H 

02/02/2009 Mon 05:43AM LST 5.0  L  11:23AM LST 28.7 H  06:38PM LST 2.1  L 

02/03/2009 Tue 12:19AM LST 24.3 H  06:34AM LST 7.4  L  12:18PM LST 27.6 H  07:42PM LST 2.3  L 

02/04/2009 Wed 01:40AM LST 23.4 H  07:43AM LST 9.3  L  01:31PM LST 26.8 H  08:58PM LST 2.0  L 

02/05/2009 Thu 03:34AM LST 24.3 H  09:09AM LST 9.5  L  02:56PM LST 27.1 H  10:19PM LST 0.9  L 

02/06/2009 Fri 04:50AM LST 26.3 H  10:27AM LST 8.2  L  04:16PM LST 28.5 H  11:39PM LST -0.9 L 

a.
occurs Friday night
c.
occurs Thursday night
b.
occurs Sunday morning
d.
occurs Wednesday morning
 

 108. 

This picture shows the forces that would create a _______ tide
mc108-1.jpg
a.
spring
c.
diurnal
b.
neap
d.
semi-diurnal
 

 109. 

This picture shows that areas with semi-diurnal tides experience

mc109-1.jpg
a.
one high and one low tide a day
c.
one high high tide and one low low tide a day
b.
one high and one low tide every two days
d.
two high and two low tides a day
 

 110. 

Mud skippers are a fish species found
a.
in the abyss of the deep sea
c.
in a rocky intertiday
b.
in the soft-bottom intertidal
d.
in tropical coral reefs
 

 111. 

Tidal range:
a.
Is the same every day for each location, but the tidal ranger varies from one location to another.
d.
Increases with each tidal cycle for a one-week period and then decreases with each tidal period for the next one-week period.
b.
Varies each day, but is the same at all locations world-wide.
e.
Varies randomly with location and time.
c.
Increases with each tidal cycle for a two-week period and then decreases with each tidal period for the next two-week period.
 

 112. 

All of the following are incorrect except:
a.
Diurnal tide has two high tides and two tides with the same tidal range each day.
d.
Diurnal tide has one high tide and one low each day.
b.
Semidiurnal tide has one high tide and one low tide each day.
e.
Semidiurnal tide has two high tides and two low tides with the different tidal range each day.
c.
Mixed tide has two high tides and two low tides with the same tidal range each day.
 

 113. 

Neap and spring tides:
a.
Correspond with phases of the Moon: neap tide with the new and full Moon and spring tide with the first and last quarter Moon.
c.
Correspond to tidal ranges: neap tides with the minimum tidal range and spring tides with the maximum tidal range.
b.
Correspond with the seasons: neap tide with winter and summer and spring tide with spring and fall.
d.
Are random occurrences related to the wind. Are related to the tidal resonance of the basin.
 

 114. 

Tides are generated by:
a.
The movement of water in the center of the gyre.
c.
Gravitational attraction of the Sun and Moon on the ocean and centrifugal force as the Earth moves in its orbit.
b.
Resonance of the ocean basins to the rotation of the Earth.
d.
All of the above.
 

 115. 

Tides:
a.
Are not influenced by Coriolis deflection.
d.
Are offset to the east because of the westward rotation of the Earth.
b.
For amphidromic systems in all bodies of water.
e.
Can make storm surges much more severe.
c.
Are rotated around the ocean basin by the currents in the gyres.
 

 116. 

The subtidal zone is the area
a.
between low and high tide
d.
where pelagic organisms live
b.
beyond the continental shelf
e.
above the highest tide
c.
between the intertidal zone and the edge of the continental shelf
 
 
nar006-1.jpg
 

 117. 

Mobile Alabama has ...
a.
semi-diurnal
c.
mixed tides
b.
diurnal tides
d.
spring tides but no neap tides
 

 118. 

The tidal range for Mobile Alabama is
a.
1.5 meters
c.
more than 2 feet
b.
less than 2 feet
d.
the largest of any location on the planet
 

 119. 

As you entered data for the tides lab, it probably became clear to you that
a.
the tidal cycle matches our calendar perfectly, each day has 1 high and 1 low tide
c.
the tidal cycle follows the lunar cycle, which means that tidal times and heights change each day.
b.
the tidal cycle matches the seasonal calendar, spring tides come in the spring, neap tides come in the neap
d.
the tidal cycle is completely random with no order to it
 



 
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