Earthquakes and volcanoes Flashcards

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1
Q

define focus

A

point of earthquaje

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2
Q

epicenter

A

point directly above the focus

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3
Q

what is an active volcano

A

volcano that has erupted recently

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4
Q

dormant volcano

A

has not erupted recently but could in the future

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5
Q

Extinct volcano

A

unlikely to erupt again, no magma inside

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6
Q

features of shield volcano (2)

A

Gentle slopes, slow flowing lava

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7
Q

features of cone volcano

A

steep slopes, violent eruption

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8
Q

what is a composite volcano mixed of and madee of

A

cone, shield volcanoes, made of ash and lava

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9
Q

define oceanic crust

A

younger, heavy, can sink bc it is being replaced and destroyed

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10
Q

define continental crust

A

old, light, cannot sink because it is permenant

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11
Q

when does collision occur

A

when 2 continental plates move towards eachoter

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12
Q

constructive occurs when……..

A

2 plates move away from eachother

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13
Q

when does conservative happen

A

when 2 plates slide past eachother

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14
Q

Destructive occurs when………… dubduct con pl

A

oceanic plate is subducted by a continental plate

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