chapter 25

Question 1

mid ocean ridge

Answer 1

a system of mountain ranges with a rift valley between them that extends around earth on the seafloor formed where oceanic plates spread apart due to magma rising.

Question 2

rift valley

Answer 2

long narrow depression formed in between the peaks along the mid oceanic ridged.

Question 3

convergent plate boundry

Answer 3

boundary where two plated collide produces either subduction zones or continental.

Question 4

subduction

Answer 4

the movement of a dense oceanic plate under a buoyant continental plate.

Question 5

divergent plate boundary

Answer 5

the boundary between two plates that are moving apart.

Question 6

transform plate boundary

Answer 6

tectonic plate boundary in which plates slide horizontally past each other in opposite directions.

Question 7

earthquake

Answer 7

sudden movement or vibration of the ground

Question 8

fault

Answer 8

a crack in earths crust along which rock has moved

Question 8

fault

Answer 8

a crack in earths crust along which rock has moved

Question 9

focus

Answer 9

the point orgin for an earthquake

Question 10

epicenter

Answer 10

the point on earths surface directly above the focus

Question 11

who came up with the continental drift?

Answer 11

Alfred wegener

Question 12

what are some evidence for the continental drift hypothisis?

Answer 12

1.The cost lines matched up
2. Mountain ranges matched up with same type
3

Question 13

whats the name of super continent

Answer 13

pangaea

Question 14

who came up with seafloor spreading hypothesis

Answer 14

harry hess

Question 15

how did harry discover seafloor spreading

Answer 15

he discovered mid ocean ridge

Question 16

who discovered MOR

Answer 16

harry hess

Question 17

where are younger rocks formed

Question 18

what are the type plate boundary

Answer 18

divergent boundary
convergent boundary
transform boundary

Question 19

how do convergent plate boundarys move

Answer 19

collides

Question 20

subduction only happens with with which type of plate boundary

Answer 20

convergent

Question 21

what type of crust do we have

Answer 21

continental crust

Question 22

which type of crust has to be present for volcanic activity

Answer 22

oceanic crust

Question 23

what two lands can be created

Answer 23

valcanos deep sea trench

Question 24

what can be created when two oceanic plates come together

Answer 24

volcanic islands

Question 25

which plate boundaries have shallow earthquakes?

Answer 25

divergent and transform

Question 26

what types of stress are applies to rocks that cause earthquakes

Answer 27

elastic and plastic

Question 28

how many types of seismic waves are there

Answer 28

primary surface