Oceanography test 4
at a lower temperature than
Seawater freezes ______ fresh water
False
Seawater is salty because it is evaporated river water.
High heat capacity
The property of water that accounts for the ability of liquid water to absorb heat and change only very little in temperature is called
neritic
The open ocean environment, over the continental shelves.
diatom
Two valves, or shells, of glass-like substance
In the temperate zones
Where, through a year, is the great total oceanic primary productivity?
sodium and chloride
Other than the hydrogen and oxygen atoms themselves, the two must abundant elements (ions) dissolved in seawater are:
as a byproduct of photosynthesis
Oxygen enters seawater mainly
dinoflagellate
Red tides can be caused by these
the average length of time an element spends in the ocean.
Residence time is
when the salinity increases
The density of a parcel of seawater will increase
All these statements apply
The depth to which light can penetrate the ocean depends on:
oxygen atoms of another water molecule
The hydrogen atoms in a water molecule tend to bond to
All of these are relevant
The hydrogen bonds of water molecules account for which of the following:
gravity
The main force driving thermohaline circulation is:
nitrates and phosphates
The main inorganic nutrients necessary for the success of marine autotrophs are:
rom the respiration of marine animals and other organisms
The major source of carbon dioxide in seawater is
the tropics
The most pronounced thermoclines exist in:
Ediacaran biota
The name for invertebrates that evolved after the Snowball glaciations are the:
Cnidoblasts
The name of the stinging cells on the tentacles of members of Cnidaria are called
Pelagic
The open ocean environment in general
heterotrophs
The organisms that consume autotrophs are called
primary producers
The organisms that produce food are called:
that the ratio of major salts in samples of seawater from various places is a constant.
The principle of constant proportion states
the total amount of dissolved solids in the ocean.
The term salinity refers to
False
Vent communities are very rare; only one or tow are known, and those are located near the Galapagos Islands.
temperature, salinity and density
The ocean is stratified with respect to
limiting factor
A physical or biological necessity whose presence in inappropriate amounts limits the normal action of an organism is called a
A halocline
A zone in which the ocean's salinity increases rapidly with increasing depth is called:
on the bottom
Benthic organisms live:
False
Deep vent communities depend on specialized autotrophs that extract the exceedingly dim light that filters down to that depth, and uses it is a specialized form of photosynthesis to produce carbohydrates
carbohydrates
In photosynthesis, the energy of sunlight ultimately rests in
False
Increasing heat is an objects response to an increase in temperature.
True
Marine algae are non-vascular plants
ectothermic
Most marine organisms have an internal temperature very close to that of their surroundings. They are known as __________ organisms.
in colder water
The amount of gas that seawater can hold in solution will be greater
35 o/oo
The average salinity of the world ocean is about:
green and blue
The wavelength of light that penetrate deepest into the ocean are:
the euphotic zone
The zone of lighted ocean in which marine autotrophs tap more energy than they use to stay alive is called
True
Life in the ocean is classified using the Linnean taxonomic system (True or False)
