Ocean Water & Life

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UNA- Dr.Puckett

The total amount of solid material dissolved in water is known as:

a) salinity
b)solute
c)insoluble residue
d) load

a) salinity

A rapid change in temperature with depth in the ocean is called the_______.

a) pycnocline
b) homocline
c) isocline
d) thermocline
e) barocline

d) thermocline

A rapid change in density with depth in the ocean is called the ____.
a) pycnocline
b)thermocline
c) isocline
d) barocline
e) homocline

a) pycnocline

Productivity in temperate oceans is determined by ______.

a)latitude
b)ocean currents
c)seasons
d) all of these

d) all of these

The emission of water vapor and other gases from volcanoes is called _____.

Outgassing

______ refers to the change in temperature with depth in the ocean.

Thermocline

The pycnocline is a rapid change in _____ with depth in the ocean.

Density

____ include all organisms that drift with ocean currents.

Plankton

____ refers to the mass of all living organisms on Earth.

Biomass

Among plankton, animals that drift on ocean currents are specifically known as _____.

Zooplankton

Clams, sponges, and crabs are all examples of ____ organisms.

Benthos

In the food chain, each feeding stage is called a ____ level.
a) replenishment
b) trophic
c) bios
d) none of these

b) trophic

Choose the option that doesnt fit.
a)sodium chloride
b)magnesium chloride
c) sodium sulfate
d)carbon dioxide

...

Choose the option that doesnt fit.
a) plankton
b) nekton
c) neritic
d) benthos

c) neritic

Choose the option that doesnt fit.
a)photic zone
b) intertidal zone
c) neritic zone
d) oceanic zone

A) photic zone

Density in seawater is determined by _____.
a) salinity
b) temperature
c) both A and B
d) none of these

c) both A and B

Most marine animals live near the surface of the ocean because of _____, which supports photsynthesis by marine algae that form the basis of the food chain.
a) sunlight
b) warmer temperatures
c) air
d) all of these

d) all of these

Organisms, such as algae and bacteria, that drift with ocean currents are known as ____.

a) plankton
b) biomass
c) benthos organisms
d) nekton
e) none of these

a) plankton

The mass of all living organisms on Earth is called the ____.
a) biomass
b) nekton
c) plankton
d) benthos organisms

a) biomass

Technically, algae are called _____.
a)bioplankton
b) zooplankton
c) nekton
d) benthos organisms

c)nekton

Animals capable of moving independently of the ocean currents, by swimming or other means of propulsion, are called _____.
a) plankton
b) biomass
c)nekton
d)benthos organisms

c)nekton

____ organisms live on or in the ocean bottom.
a) nektonic
b) scavenging
c) benthos
d) planktonic
e) none of these

c) benthos

The upper part of the ocean into which sunlight penetrates is called the ____ zone.
a)photic
b) life
c) mixing
d) thermal

a)photic

The ____ zone is the near-surface zone of the ocean where light is strong enough for photosynthesis to occur.
a) aphotic
b)photic
c)synphotic
d)euphotic

d) euphotic

The area where the land and ocean meet and overlap is called the ___ zone.
a) oceanic
b) intertidal zone
c) neritic
d) none of these

b) intertidal zone

Seaward of the low tide line is called the ____ zone.
a) oceanic
b) neritic
c) intertidal
d)none of these

b) neritic

Open ocean of any depth where animals swim or float freely is known as the ______ zone.
a)pelagic
b)unrestricted
c)benthic
d)abyssal

...

The amount of carbon fixed by organisms through the synthesis of organic matter using energy derived from solar radiation is called ____.
a) primary productivity
b) photosynthesis
c) chemosynthesis
d) none of these

a) primary productivity

Thermoclines in the ocean are best developed at ____.
a) lower latitutdes
b) both high and low latitudes
c) regions close to continents
d) higher latitudes

a) lower latitudes

The proportion of dissolved substances in seawater is expressed as 0/00 which is the same as ____.
a) parts per hundred
b)parts per million
c) parts per thousand

c) parts per thousand

The most abundant salt in seawater is _____.
a) NaCl
B) KCL
c) MgCl2
d) none of these

....

The dissolved materials in seawater are thought to originate from chemical weathering of rocks on the continent and are also

...

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