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Intro to Marine Science Exam #2 Questions with Correct Answers
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  • Course
  • Marine Science
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  • Marine Science

viscosity - Answer-a measure of a fluid's resistance to flow that describes the internal friction of a moving fluid source - Answer-the flux into a geochemical reservoir, such as the addition of elements to seawater by rivers or by seafloor hydrothermal processes sink - Answer-the flux out of...

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  • September 19, 2024
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  • 2024/2025
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  • intro to marine science exam 2 questions with cor
  • viscosity answer a measure of a fluids resistan

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Intro to Marine Science Exam #2
Questions with Correct Answers
viscosity - Answer-a measure of a fluid's resistance to flow that describes the internal
friction of a moving fluid

source - Answer-the flux into a geochemical reservoir, such as the addition of elements
to seawater by rivers or by seafloor hydrothermal processes

sink - Answer-the flux out of a geochemical reservoir, such as the removal of salts from
seawater by mineral precipitation

salinity - Answer-the saltiness or dissolved salt content of a body of water; usually
expressed in grams per kilogram or parts per thousand by weight

steady-state - Answer-the case where a system or process does not change in time; as
used here, it refers to a situation where the oceans salt composition is unchanging
because inputs are balanced by outputs

conservative elements - Answer-ions with high and uniform concentrations that occur in
constant proportion to each other in the ocean through time (Na+, Cl-, K+, Mg2+, and
SO4^2-)

nonconservative elements - Answer-elements whose proportions in seawater vary in
space and time; usually because they are involved in biological or chemical processes
and have short residence times (NO3-, PO4^2-, Si, Fe, and Se)

Residence Time - Answer-Amount of element in ocean/Rate at which it is delivered (or
removed)

Chlorine (Cl-) - Answer-single most abundant ion in the ocean

Principle of Constant Proportions - Answer-states the proportions of major conservative
elements remain nearly constant with respect to each other even though total salinity
may change from place to place

salinometer - Answer-an instrument designed to measure the salinity, or dissolved salt
content, of a solution; by measuring conductivity

temperature-salinity diagram - Answer-graphical tool that plots salinity on the x axis and
temperature on the y axis

, isopycnals - Answer-a line connecting points of equal density and often used
analogously to contour lines in graphical representations of temperature and salinity
data

stable - Answer-refers to water column where density increases with water depth

unstable - Answer-a situation that occurs when denser water is introduced on top of less
dense water, which causes water to move vertically and result in mixing

overturning - Answer-vertical movement that occurs when denser water sinks and
displaces the less dense water beneath, which in turn will rise to the surface

thermocline - Answer-where temperature changes rapidly with depth

halocline - Answer-a depth interval in the ocean where salinity changes rapidly with
depth

pycnocline - Answer-layer where water density increases rapidly with depth

mixed layer - Answer-upper surface layer of the ocean in which temperature and salinity
are relatively constant with depth

deep layer - Answer-portion of the ocean below the pycnocline where there is little
additional change of density with increasing depth

isothermal - Answer-occurring at constant temperature; water column is described as
this in polar regions/latitudes

nutrients - Answer-chemicals that are essential to life; provide nourishment for growth or
metabolism in primary producers

nitrogen, phosphorus, and silicon - Answer-major nutrients in the sea that govern the
distribution of life

limiting nutrients - Answer-an element essential to a species but found in a
concentration low enough to be a ____________ factor on the population; its
abundance or lack thereof controls the maximum population of the species

primary producers - Answer-organisms in an ecosystem that produce biomass from
inorganic compounds (autotrophs- use light or chemical energy)

photosynthesis - Answer-the process by which a green plant turns water and carbon
dioxide into food when the plant is exposed to light

Redfield Ratio - Answer-atomic ration of carbon to nitrogen to phosphorus found in
phytoplankton and throughout the deep oceans (106 C: 16 N: 1 P)

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