plate boundaries

Question 1

how can you record the earth’s pole

Answer 1

Rocks permanently freeze recording the polarity at the time

Question 2

What is the force of plate motion

Answer 2

Gravity

Question 3

slab pull

Answer 3

pull of gravity on a subduciton zone

Question 4

Divergent

Answer 4

rifting apart

Question 5

convergent

Answer 5

coming together

Question 6

transform

Answer 6

sliding past (fault)

Question 7

avg depth of plates

Answer 7

100km (height of lithosphere)

Question 8

ridge push

Answer 8

mid ocean ridges pushing apart

Question 9

subduction

Answer 9

oceanic lithosphere subducting under continental lithosphere

Question 10

mantle convection

Answer 10

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

Question 11

Earthquakes

Answer 11

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

Question 12

aesthenosphere

Answer 12

melts, rises.
-youngest rocks are in the ridge

Question 13

light blue on the map

Answer 13

mid ocean ridge (divergent)

Question 14

furthest rock from plate boundary

Answer 14

Will become dense and subduct
oldest rock

Question 15

Mid ocean ridges

Answer 15

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

Question 16

convergent boundaries

Answer 16

earthquakes
volcanic eruptions
subduction zones
landslides
tsunami waves

Question 17

subduction zones

Answer 17

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

Question 18

plates colliding

Answer 18

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

Question 19

deep sea trenches

Answer 19

are the boundaries at subduction zones

Question 20

gravity

Answer 20

the force that is being applied to the plate boundary

Question 21

plates colliding examples

Answer 21

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

Question 22

continent collison

Answer 22

convergent boundaries
2 continents colliding by previous subduction zones

Question 23

low density continents

Answer 23

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)

Question 24

california plate boundaries

Answer 24

tranform boundary ex. San Andreas fault

Question 25

ridge

Answer 25

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)

Question 26

trenches

Answer 26

convergent

Question 27

will California eventually fall into the ocean?

Answer 27

No, it will move more north.

Question 28

which place in the world is the only place that you can stand on a mid ocean ridge on land?

Answer 28

iceland

Question 29

California

Answer 29

transform

Question 30

Himilayas

Answer 30

Convergent

Question 31

Japan

Answer 31

Convergent

Question 32

Where does life thrive

Answer 32

plate boundaries (mid ocean ridges)

Question 33

lithosphere slides over the

Answer 33

asthenosphere

Question 34

dep sea trenches

Answer 34

the boundaries at subduction zones

Question 35

pacific subduction zone

Answer 35

Fiji Mountains

Question 36

continental collision

Answer 36

2continents colliding by previous subduction zones

Question 37

low density

Answer 37

cannot subduct, therefore colliding with another continent