ch 25 Flashcards

(47 cards)

1
Q

a range of mountain in the sea

A

mid ocean ridge

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2
Q

peaks at the mid ocean ridge

A

rift valley

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3
Q

the boundary where two plates collide

A

convergent plate boundary

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4
Q

the denser plate

A

subduction

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5
Q

horizontally plates pasting eachother but opposite diretion

A

transform plate boundary

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6
Q

two plate moveing a part

A

divergent plate boundary

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7
Q

a sudden movement or viberation of the earth

A

earthquake

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8
Q

a crack of the earth crust

A

fault

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9
Q

sudden release of strain energy to a fault

A

elastic rebound

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10
Q

were the earthquake start

A

focus

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11
Q

the point on earth surface directly above the focus

A

epicenter

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12
Q

what the 3 pices of evidence?

A

cost line match up like a puzzle
found large land fossils
mountain ranges match up and are made up of the same rock and age

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13
Q

what was the name of the super continent

A

pangaea

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14
Q

who came up to the sea floor spreading hypothesis

A

harry hess

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15
Q

how did he map the sea floor

A

sonar

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16
Q

what did harry hess discovered

A

mid ocean ridge system

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17
Q

where at the bottom of the sea floor where is the younges rock found

A

mor mid ocean ridge

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18
Q

what are the type of plate boundary

A

divergent
convergent
transform

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19
Q

how do the move

A

the two crash together

20
Q

subduction zone acures with what plate bondry

A

vragin plate boundry

21
Q

what two type of crust are involed in plate movement

A

oceanic crust

continental crust

22
Q

what are the type of land forms that oceanic and continental curst converge

A

volcanoes

deep sea trench

23
Q

what forms show up when two oceanic crust

A
deep sea trench 
hot spots ( land)
24
Q

what land forms when it two continenantal

25
how do divergent plate
moveing away
26
what are two explies of divergent
mor (oceanic plate only) | east african rift
27
who do transform plate move
they side pass each other
28
what are example of a a tranform plate
sandadreus fault
29
what type of boundrys have shallow earth quakes
divergent and transform
30
who has deeper earth quakes
convergent
31
what are the four kind of stress that rocks have
compression tension shear torsion
32
what are the typs of deformation
elastic | plastic
33
what happen to the rock if elastic deformtion happen
returns to it normal shape
34
what if plastic deformation happen
remains in new shape
35
what type of seismc waves
pimarey secondry waves surface waves
36
what wave mnoves the fastest
p wave
37
what type of a wave is a p wave
compress
38
what type of meates p wave move thourgh
solids and liquids
39
what kind s wave move
only solids
40
dangerus wave
complex
41
two scales
mercalli | richter
42
what dose thr richter scale
engery
43
what is viscosity
a measure of a fluids resistance
44
what is silica
a compound that is found in magma
45
what is a cinder cone volcanoes
small heights in hundreds of meters range and have a short eruption cycles
46
what is a shield volcanoes
broad flat stuctures compose of layer of lava flow
47
what is composite volcanoes
large steep side compose of ash and lava