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6th Science 4th Quarter Exam
6th Science 4th Quarter Exam
46
Science
6th Grade
05/19/2014

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Term
the broad, flat ocean bottom
Definition
abyssal plain
Term
the point ar which the continental shelf, which surrounds each continent, begins to angle sharply downward
Definition
continental edge
Term
the lower portion of the continental slope, extending to the ocean floor
Definition
continental rise
Term
the sloping shelf of land, consisting of the edges of the continents under the ocean
Definition
continental shelf
Term
the steep clifflike drop from the continental edge to the ocean floor
Definition
continental slope
Term
a chain of mountains under the ocean
Definition
mid-ocean ridge
Term
an underwater mountain that formed from a vocano
Definition
seamount
Term
a current of water carrying large amounts of sediment
Definition
turbidity current
Term
The _________ can extend hundreds of miles out into the ocean.
Definition
continental shelf
Term
Beyond the _________ the ocean increases rapidly in depth.
Definition
continental edge
Term
The _________ connects the continental shelf with the ocean bottom.
Definition
continental slope
Term
The _________ usually starts angling down to the ocean floor about a mile beneath the ocean.
Definition
continental rise
Term
The _________ covers nearly half of the Earth's surface.
Definition
abyssal plain
Term
_________ of seamounts rise from the floor of the pacific.
Definition
Thousands
Term
What is a flat topped seamount called?
Definition
guyot (ge'o)
Term
Turbidity currents may cause ________ to build up in some places.
Definition
sediments
Term
What does sonar mean?
Definition
Sound Navigation Ranging
Term
Where did the Conshelf II house five researchers for 30 days?
Definition
on the floor of the Red Sea
Term
What is echolocation and what does it do?
Definition
It is a porpoise's sonar and it enables the animal to locate and track food.
Term
What happens when organisms in the ocean die?
Definition
Their remains settle to the bottom and become part of the organic sediments.
Term
the top of a wave
Definition
crest
Term
great rivers of water moving through the ocean
Definition
current
Term
the tide occuring at the first and third quarters of the moon, when the difference in level between high and low tide is smallest
Definition
neap tide
Term
a division of geologic time that is a subdivision of an era. The interval of time between two successive wave crests.
Definition
period
Term
a tide occuring at or just after the new moon and full moon; usually the highest tide of the month.
Definition
spring tide
Term
the tendency of a body or fluid moving across Earth's surface to have a curving motion due to Earth's rotation.
Definition
Coriolis effect
Term
The daily rise and fall of the surface of the ocean or other large body of water, caused by the gravitational attraction of the moon and the sun.
Definition
tide
Term
a prevaling wind that blows from east to west on either side of the equator
Definition
trade wind
Term
the rising of deep water to the surface that occurs when winds move surface water
Definition
upwelling
Term
the distance between the crests of two successive wave
Definition
wavelength
Term
the up-and-down movement of the surface of water, caused by the wind
Definition
waves
Term
a prevailing wind that blows from west to east
Definition
westerly
Term
salinity
Definition
the total amount of dissolved salts in ocean water
Term
plankton
Definition
organisms, generally microscopic in size, that float or drift in the ocean
Term
zooplankton
Definition
any of the tiny animal like organisms that live near the surface of the ocean
Term
photosynthesis
Definition
the process by which green plants and other producers use light energy to make food
Term
nekton
Definition
all the free-swimming animals that live in the ocean including such animals as fish, octopus, and whales
Term
benthos
Definition
all the plants and animals that live on the ocean bottom, including oysters, crabs, and coral
Term
Water covers _________ of Earth's surface.
Definition
two-thirds
Term
________ is a mixture of the compound water (H2O) and several salts.
Definition
ocean water
Term
The most common salt in ocean water consists of two elements, _______ and _________.
Definition
sodium and chlorine
Term
Sodium and Chlorine are combined as ___________, which is used as table salt.
Definition
sodium chloride
Term
Because the ocean is so huge, its overall _______ changes very slowly.
Definition
salinity
Term
Ocean water is a "soup" of living organisms, such as ______, ________, and _________.
Definition
fish, plankton, and kelp
Term
________ freezes at a lower temperature the fresh water.
Definition
salt water
Term
Ocean water also includes some harmful substances put there by __________.
Definition
human pollution
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