Exam 2 - Plate Tectonics

Question 1

The lithosphere is broken up into _____ , and they move over the ______.

Answer 1

plates; asthenosphere

Question 2

When was Pangea proposed

Answer 2

1915

Question 3

Pangea

Answer 3

evidence of plate tectonics

Question 4

Seafloor spreading

Answer 4

evidence of plate tectonics

Question 5

What causes the breakup or rifting of a continent

Answer 5

mid ocean ridges

Question 6

Mid-ocean ridges

Answer 6

asthenosphere moved up through the lithosphere and broke open the land

Question 7

What is an example of mid ocean ridges

Answer 7

Baja California

Question 8

Ages of the ocean floor

Answer 8

evidence for plate tectonics

Question 9

Where are the youngest sea floors located?

Answer 9

top of the mid-ocean ridge

Question 10

Where are the oldest sea floors located?

Answer 10

farthest away from the mid-ocean ridges

Question 11

What did geologists discover about the mid-ocean ridges?

Answer 11

the ridges are symmetrical in ages on the other side

Question 12

What does symmetrical mid-ocean ridges prove?

Answer 12

that at one point there was no ocean, confirming pangea

Question 13

What occur at plate boundaries?

Answer 13

Earthquakes, tsunamis, volcanoes, and landslides

Question 14

How to lithospheric plates move

Answer 14

in respect to each other

Question 15

Where is the pacific plate moving?

Answer 15

northwest

Question 16

3 types of plate boundaries

Answer 16

Divergent
Convergent
Transform

Question 17

Which plate boundary is mostly under the sea

Answer 17

divergent

Question 18

Where are ocean floors manufactured

Answer 18

mid-ocean ridges

Question 19

Where plates collide with another plate, even though it’s happening under the water mostly

Answer 19

Convergent

Question 20

Where are oceanic plates distroyed

Answer 20

subduction zones

Question 21

gravity

Answer 21

force for plate motion

Question 22

Where are slab pulls located

Answer 22

at subduction zones

Question 23

One plate is being pulled into the mantel next to the other plate

Answer 23

subduction zones

Question 24

Ridge push

Answer 24

mid ocean ridges

Question 25

Grave yard for the plates

Answer 25

mantle convection

Question 26

Earthquakes mirror what

Answer 26

the plate boundaries (subduction zone)

Question 27

More earthquakes occur at _____ boundaries than at _____ boundaries

Answer 27

convergent; divergent

Question 28

Why do more earthquakes occur at convergent boundaries?

Answer 28

because the crust is on the greater stress

Question 29

What lines the pacific motions

Answer 29

volcanoes

Question 30

Why don't many volcanoes occur along the ridges

Answer 30

because they are under the sea

Question 31

Fastest moving plates

Answer 31

Cocos, Nazca, Pacific

Question 32

Why are fast plates under the sea

Answer 32

because they are denser and therefore subduct

Question 33

For the most part, plates move pretty

Answer 33

slow

Question 34

The asthenosphere comes up through the lithosphere making what

Answer 34

the oceanic lithosphere

Question 35

When 2 plates rift apart, what 2 things occur

Answer 35

seafloor spreading and a mountain range under the sea

Question 36

What are 2 types of convergent boundaries

Answer 36

subduction zone and continental collision

Question 37

What happens at a subduction zone

Answer 37

2 plates collide

Question 38

At a subduction zone, the oceanic plate subducts under what plate

Answer 38

continental plate

Question 39

Why can't the continental plate subduct?

Answer 39

because it lacks the density

Question 40

Marks the place where the oceanic plate is going underneath the continental plate

Answer 40

trench

Question 41

Why do natural disasters occur at subduction zones

Answer 41

because the stress is so great on the crust that the pressure builds up and eventually has to let go

Question 42

Why do we have landslides

Answer 42

earthquakes can trigger them

Question 43

Andes are the product of what

Answer 43

subduction zone

Question 44

Which continent is controlled by subduction

Answer 44

South America

Question 45

What is Mt. Fuji a result of

Answer 45

subduction zone

Question 46

What has already happened at a continental collision

Answer 46

oceanic plate has already subducted

Question 47

Example of continental collision

Answer 47

Himalayan Mountains

Question 48

How were the Himalayan Mountains created

Answer 48

India collided with Indochina

Question 49

Why are seashells at the top of the himalayan mountains?

Answer 49

because the collision brought things from the bottom of the sea to the top

Question 50

Two belts of convergence

Answer 50

Pacific Rim of Fire and Alpine-Himalayan Belt

Question 51

Subduction controls this

Answer 51

Pacific rim of fire

Question 52

Controlled by continental collision

Answer 52

Alpine-Himalayan Belt

Question 53

Where do we preserve oceanic lithosphere

Answer 53

transform boundary

Question 54

Slides in opposite direction

Answer 54

transform boundary

Question 55

What does the transform boundary do

Answer 55

connect segments of the oceanic ridges everywhere along the earth

Question 56

Tons of earthquakes, no volcanoes

Answer 56

Transform boundary

Question 57

Most well known transform boundary

Answer 57

San Andreas Fault

Question 58

What plates make up the San Andreas Fault

Answer 58

pacific plate and north american plate

Question 59

What will eventually happen to western California

Answer 59

move northwards because it is subjecting into the mantle

Question 60

Completely separated from the subduction zone

Answer 60

hot spots

Question 61

Rising plume, buoyant, less dense material

Answer 61

hot spots

Question 62

What is a supreme example of convection

Answer 62

hot spots

Question 63

Hot spot velocity

Answer 63

not much, very negligee

Question 64

Hot spot movement

Answer 64

the plates where the hot spot is embedded is what moves

Question 65

What moves with the hot spot

Answer 65

volcanoes

Question 66

Youngest Volcano

Answer 66

hawaii

Question 67

Oldest volcano

Answer 67

kauai

Question 68

Most active volcano

Answer 68

kilquea

Question 69

Volcanic islands get older in the direction of _____

Answer 69

plate motion

Question 70

Job of the pacific plate

Answer 70

to move you away to the southwest

Question 71

why is the pacific plate moving

Answer 71

because the plate is sub ducting into the mantle

Question 72

Newest island in the chain of island in the future

Answer 72

Loihi seamount

Question 73

Where is the loihi seamount located

Answer 73

southeast