ocean basin Flashcards

1
Q

zones of oceanic waters

A

pelagic

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2
Q

Volcanic eruptions spewed gases from Earth’s interior to the atmosphere, a process called outgassing that continues today. Most of the gas was carbon dioxide and water vapor. The water vapor condensed to form part of Earth’s oceans as the surface cooled.

A

volcanic out gassing theory

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3
Q

areas of the bottom or topography of the ocean

A

benthic

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4
Q

starting from the coast

A

intertidal zone

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5
Q

sunlight zone

A

epipelagic zone

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6
Q

zone where light is not sufficient

A

mesopelagic zone

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7
Q

midnight zone

A

bathypelagic zone

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8
Q

13k feet to the ocean floor, where it’s 3-4°C cold

A

abyssopelagic zone

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9
Q

the deepest pit of the ocean

A

hadalpelagic zone

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10
Q

zone of divergence

A

guyot

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11
Q

area of relatively shallow water

A

continental shelf

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12
Q

lies between continental shelf and abyssial plane

A

continental slope

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13
Q

final stage in the boundary between continents and deep parts of the ocean

A

continental rise

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14
Q

a deep canyon on the ocean floor

A

oceanic trench

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15
Q

a volcanic mountain on the ocean floor also known as unborn islands

A

seamount

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16
Q

where molten rock rises

A

mid ocean ridge

17
Q

sequence of events leading to the formation of ocean basins

A

wilson cycle

18
Q

rift valley forms

A

embryonic

19
Q

sea floor basalts form

A

juvenile

20
Q

ocean basin widens and trenches develop & subduction begins

A

mature

21
Q

subduction eliminates much of the sea floor

A

declining

22
Q

the sea floor completely vanishes and mountain range forms

A

terminal