ch 25 Flashcards

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1
Q

a system of mountain ranges on the seafloor separated by valleys was discovered by Hess

A

mid-ocean range

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2
Q

forms in between peaks along the mid-ocean ridge

A

rift valley

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3
Q

boundary where two plates collide

A

convergent plate boundry

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4
Q
A

subduction

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5
Q
A

divergent plate boundry

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6
Q
A

transform plate boundry

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7
Q

Who came up with the Continental drift hypothesis

A

Alfred Wegener

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8
Q

what are some evidence for the Continental drift

A

mountain ranges matched up with the same rock type

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9
Q

what was the name of the super-continent

A

Pangaea

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10
Q

Who came up with the Seafloor spreading hypotheses

A

Harry Hess

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11
Q

how did he discover the seafloor spreading

A

he discovered the mid-ocean ridge

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12
Q

who discovered the MOR

A

Hess

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13
Q

where is under rock reformed under the ocean floor

A
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14
Q

what are the types of plate boundaries

A
  • divergent boundary
  • convergent boundary
  • transform boundary
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15
Q

seduction only happens with what type of plate boundary

A
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16
Q

what type of crust do we have

A
  • oceanic crust

- continental crust

17
Q

what type of crust has to be present in order for volcanic activity

A

ocean crust

18
Q

what can be created when two oceanic plates come together

A

volcanic islands