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physical science > CH25 > Flashcards

CH25 Flashcards

1
Q

mid-ocean ridge

A

a system of mountain ranges

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2
Q

rift valley

A

forms between peaks

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3
Q

convergent plate boundary

A

two plates collide

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4
Q

subduction

A

when a thick and a thinner plate hit

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5
Q

divergent plate boundary

A

boundary between two plates

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6
Q

transforms plate boundary

A

plates slid horizontally past each other

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7
Q

earthquake

A

is the sudden movement or vibration

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8
Q

fault

A

is a crack in the earths crust

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9
Q

elastic rebound

A

sudden release of strain energy

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10
Q

focus

A

the point of origin for an earthquake

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11
Q

epicenter

A

earths surface directly above the focus

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12
Q

who came up with the continental drift hypothesis

A

Alfred Wegener

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13
Q

What is some evidence for the continental drift

A

1: the coast lines matched up like a puzzle peace
2: mountain ranges with the same rock type
3: they found large animal bones

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14
Q

What was the super continent called

A

Pangaea

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15
Q

who came up with the sea floor hypothesis

A

Harry Hess

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16
Q

how did he discover sea floor spreading

A

sonar

17
Q

who discovered the MOR-Mid Ocean Ridge

A

Hess

18
Q

on the ocean floor where is the newer rock formed

A

Closer to the MOR

19
Q

what are the types of plate boundary

A

Divergent plate boundary
Convergent boundary
Transform boudary

20
Q

how do convergent plate boundary move

A

move together

21
Q

subduction only happens with which type of plate boundary

A

convergent

22
Q

what are the two types of crust

A

continental crust

oceanic crust

23
Q

which type of crust has to be present for volcanic action

A

oceanic crust

24
Q

if oceanic or continental crust come together what will form

A

deep sea trench

volcanos

25
Q

what forms if two oceanic crust colid

A

deep sea trench

oceanic island

26
Q

what do hot spots create

A

islands

physical science (12 decks)

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