Plate Boundaries

Question 1

three ways we determine plate boundaries

Answer 1

direction of movement
speed of movement
type of plate

Question 2

two types of convergent boundaries

Answer 2

destructive
collision

Question 3

describe a destructive plate boundary

Answer 3

an oceanic plate is subducted under a less dense oceanic plate or a continental plate. this causes stress and friction where they touch. earthquakes can be caused. fold mountains and volcanoes are also formed. a trench is formed on the oceanic plate by buckling as well.

Question 4

what is the benioff zone

Answer 4

the area where the plate is burnt up and destroyed in a destructive plate boundary.

Question 5

describe a collision plate boundary

Answer 5

two continental plates hit each other and push up creating fold mountains where the plates splinter.

Question 6

what’s the type of divergent plate boundary

Answer 6

continental rift

Question 7

describe continental rift

Answer 7

where two plates move apart and crack. this causes new oceanic crust in this gap which is lower down, leading to a body of water eventually. if an oceanic plate is envolved or a body of water we get “sea floor spreading”.

Question 8

describe a conservative plate boundary

Answer 8

plates move past each other and snag, causing earthquakes. they have a zone of shearing down the middle. tiny ones can be made at divergent boundaries (jagged plate lines).

Question 9

describe how plumes create hot spots and give an example of one.

Answer 9

hawaii

a hotter part of the core shoots up a plume which if it can penetrate the lisosphere will create a hotspot. it never moves. it creates island chains like hawaii.

Question 10

what are intraplate earthquakes

Answer 10

they are earthquakes which happen away from plate boundaries in old continental ones that are cracking with stress.