plate boundaries Flashcards

1
Q

how can you record the earth’s pole

A

Rocks permanently freeze recording the polarity at the time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the force of plate motion

A

Gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

slab pull

A

pull of gravity on a subduciton zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Divergent

A

rifting apart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

convergent

A

coming together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

transform

A

sliding past (fault)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

avg depth of plates

A

100km (height of lithosphere)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

ridge push

A

mid ocean ridges pushing apart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

subduction

A

oceanic lithosphere subducting under continental lithosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

mantle convection

A

-denser (colder) moves down
-less dense (hotter) moves up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Earthquakes

A

outline plate boundaries, continents and ocean basin.
-mid ocean ridges do not have many earthquakes
-land that surrounds the ocean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

aesthenosphere

A

melts, rises.
-youngest rocks are in the ridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

light blue on the map

A

mid ocean ridge (divergent)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

furthest rock from plate boundary

A

Will become dense and subduct
oldest rock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Mid ocean ridges

A

Atlantic (divergent)
Indian (Divergent)
East Pacific Rise; very active (divergent)
Southwest Indian ridge
Iceland volcanoes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

convergent boundaries

A

earthquakes
volcanic eruptions
subduction zones
landslides
tsunami waves

17
Q

subduction zones

A

Can have mega thrust earthquakes
Largest ever recorded was a 9.5 in chile

18
Q

plates colliding

A

subduction zones (oceanic plates going down, more denser than continent)

19
Q

deep sea trenches

A

are the boundaries at subduction zones

20
Q

gravity

A

the force that is being applied to the plate boundary

21
Q

plates colliding examples

A

Andes mountains
Japan (fiji mountains)
mt hood, st helen

22
Q

continent collison

A

convergent boundaries
2 continents colliding by previous subduction zones

23
Q

low density continents

A

cannot subduct, they collide with other continents
ex. Himalayan mountains
can cause organisms from the bottom of the ocean to be in mountains.
(only one continent moves)

24
Q

california plate boundaries

A

tranform boundary ex. San Andreas fault

25
ridge
divergent, transform, divergent, transform. ridge separates the continents 2 plates sliding past in opposite directions in 15m years California will separate with parts of Mexico ( transform boundary)
26
trenches
convergent
27
will California eventually fall into the ocean?
No, it will move more north.
28
which place in the world is the only place that you can stand on a mid ocean ridge on land?
iceland
29
California
transform
30
Himilayas
Convergent
31
Japan
Convergent
32
Where does life thrive
plate boundaries (mid ocean ridges)
33
lithosphere slides over the
asthenosphere
34
dep sea trenches
the boundaries at subduction zones
35
pacific subduction zone
Fiji Mountains
36
continental collision
2continents colliding by previous subduction zones
37
low density
cannot subduct, therefore colliding with another continent