Oceanography 1 Flashcards

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1
Q

oceanography

A

the study of the physical and biological properties of the seas/oceans

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2
Q

deep ocean basin

A

region of the ocean floor made of oceanic crust (deep)

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3
Q

continental margin

A

region of the ocean floor made out of continental crust (shallow)

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4
Q

ocean trench

A

a steep, long depression in the deep-sea floor that runs parallel to a chain of volcanic islands or a continental margin

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5
Q

midocean ridge

A

a long, undersea mountain chain that forms along the floor of the major oceans

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6
Q

rift valley

A

a long, narrow valley that forms as tectonic plates separate

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7
Q

seamount

A

a submerged mountain on the ocean floor that is at least 1000 m high and that has a volcanic origin

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8
Q

continental shelf

A

the gently sloping section of the continental margin located between the shoreline and the continental slope

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9
Q

continental slope

A

the steeply inclined section of the continental margin located between the continental rise and the continental shelf

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10
Q

continental rise

A

the gently sloping section of the continental margin located between the continental slope and the abyssal plain

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11
Q

abyssal plain

A

a large, flat, almost level area of the deep-ocean basin

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12
Q

echo-ranging

A

determination of the distance and direction of an object (as under water) by means of an echo (as of sound) returned by the object

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