ch 25

Question 1

a system of mountain ranges on the seafloor separated by valleys

Answer 1

Mid-Ocean Ridge

Question 2

a long narrow depression

Answer 2

rift valley

Question 3

A tectonic boundary where two plates are moving toward each other

Answer 3

convergent plate boundary

Question 4

the denser plate dives beneath the continent in a proce

Answer 4

subduction

Question 5

boundary between two plates that are moving apart

Answer 5

divergent plate boundary

Question 6

transform plate boundary

Answer 6

boundary where plates slides horizontally past each other in opposite directions

Question 7

earthquake

Answer 7

is the sudden movement or vibration of the ground occurs when rocks slip and slide along enormous cracks

Question 8

fault

Answer 8

is a crack in earth’s crust along which rock has moved

Question 9

elastic bound

Answer 9

sudden release of strain energy as rock moves along a fault

Question 10

focus

Answer 10

point of origin for an earthquake

Question 11

epicenter

Answer 11

point on earth’s surface directly above the focus

Question 12

how do divergent plate boundaries move?

Answer 12

the move in opposite directions

Question 13

what are two examples of divergent boundaries?

Answer 13

MOR is made up of oceanic crust and East African crust

Question 14

how do transform plates form move

Answer 14

they slide by each other horizontally

Question 15

what is a specific exaple of transformation plate boundary

Answer 15

San andrias fault

Question 16

how do convection currents work

Answer 16

magma heats up becomes less dense then rises.

magma cools down then more dense then sinks

Question 17

what are the sources for molten material inside earth?

Answer 17

magma

Question 18

what determines the eruptive style of a volcano

Answer 18

temperature and viscosity

Question 19

what is the relationship between valcaonoes and late tectonics?