Ocean test 4
Seawater freezes at a lower temp then
fresh water
Where though the year is the greatest total oceanic primary productivity
in the temperate zones
Other than the hydrogen and oxygen atoms themselves, the 2 most abundant elements dissolved in seawater are
Sodium and chloride
Residence time
The average length of time that an element stays in the ocean for
Life in the ocean is classified using the Linnean tax system
True
Marine algae are non-vascular plants
True
Oxygen enters seawater mainly as
A by-product of photosynthesis
Physical or biological necessity whose presence in inappropriate amounts limits the normal action of an organism is called
A limiting factor
Depth to which light can penetrate the ocean depends on
Angle of sun, smoothness of the water, amount of suspended material in water, dust, cloud cover and gases in atmosphere
Hydrogen atoms in a water molecule tend to bond to oxygen atoms of
Another molcule
In photosynthesis the energy of sunlight ultimately rests in
Carbohydrates
Name of the stringing on the tentacles of members of cnidaria are
Cnidoblasts
2 valves, or shells of glass-like substance
Diatom
Term "salinity" refers to total amount of
Dissolved soilds in coean
Deep vent communities depend on specialized autotrophs that extract the exceedingly dim light that filters down to that depth uses it is a specialized form of photosynthesis to produce carbohydrates
False
Increase heat is an objects response to increase in temperature
False
Seawater is salty because it is evaporated river water
False
Vent communities are very rate; only one or two are known
False
Major source of carbon dioxide in seawater is
From respiration of marine life and other organisms
Main force driving thermohalie is
Gravity
A zone in which the oceans salinity increases rapidly with increasing depth is called a
Halocline
Organisms that consume autotrophs are called
Heterotropjs
Property of water that accounts for the ability of liquid water to absorb heat and only very little in temperature is called
High heat capacity
Most pronounces thermoclines exist in
Tropics
Euphotic zone is lighted ocean in which
Marine autotrophs tap more engery than they use to stay alive
Open ocean environment, over continental shelves
Netric
Main inorganic nutrients necessary for success of marine autotrophs are
Nitrates and phosphates
Open ocean environments in general is
Pelagic
Organisms that produce food are called
Primary producers
Dinoflagellate can be caused by
Red tides
Principle of constant proportions states the ratio of major salts in
Samples of seawater from various places is a constant
Most marine organisms have a internal temperature very close to that of their surroundings
They are known as ectohermic
Hydrogen bonds of water molecules account for which of the following
Water is a universal solvent, water has high heat capacity, water has high boiling point, water has high surface tension
Density of a parcel of seawater will increase
When the salinity increases
Wavelenths of light penetrate deepest into the ocean are
blue and green
Amount of gas that seawater can hold in solute will be greater in
colder water
Name for the invertebrates that evolved after the snowball glaciations are the
ediacaran biota
Benthic
live on the bottom