Desk CH 25

Question 1

system of mountain ranges on the seafloor separated by valleys

Answer 1

mid-ocean range

Question 2

a long, narrow depression formed in between peaks along the mid-ocean range

Answer 2

rift valley

Question 3

the boundary where two plates collide

Answer 3

convergent plate boundary

Question 4

when a thick and buoyant continental plate meets a thin and dense oceanic plate, “the denser plate dives beneath the continent

Answer 4

subduction

Question 5

the boundary between two plates that are moving apart

Answer 5

divergent plate boundary

Question 6

plates slide horizontally past each other in opposite directions

Answer 6

transform plate boundary

Question 7

is the sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in Earth’s crust called faults

Answer 7

earthquake

Question 8

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

Answer 8

fault

Question 9

sudden release of strain energy as rock moves along a fault

Answer 9

elastic rebound

Question 10

the point of origin for an earthquake

Answer 10

focus

Question 11

the point on Earth’s surface directly above the focus

Answer 11

epicenter

Question 12

what were pieces of evidence that supported his hypothesis

Answer 12

large animal fossils, coastlines matched up like puzzle pieces, mountain ranges matched up(also had same rock composition)

Question 13

what was the name of the super continent?

Answer 13

Pangaea

Question 14

Who came up with the continental drift hypothesis?

Answer 14

Alfred Wegener

Question 15

who came up with the Sea Floor spreading hypothesis?

Answer 15

harry hess

Question 16

What did Hess use to help him create a map of the sea floor?

Answer 16

sonar

Question 17

where will younger rock be found on the sea floor?

Answer 17

closer to the MOR or near the MOR

Question 18

who discovered the mid-ocean ridge

Answer 18

harry hess

Question 19

what are the three types of plate boundaries?

Answer 19

divergent boundary,convergent boundary, and transform boundary

Question 20

close together or collide

Answer 20

convergent

Question 21

subduction only happens with which type of plate boundaries

Answer 21

convergent

Question 22

what are the two types of crust are involved in plate

Answer 22

oceanic crust

continental crust

Question 23

what lands form when oceanic crust and continental convert

Answer 23

oceanic trenches

Question 24

what land forms can be formed when two oceanic crust collide

Answer 24

hot spots= they create islands

Question 25

what land is created when two continental collide?

Answer 25

mountains

Question 26

What type of crust must be presented from volcanoes activity occur?

Answer 26

ocean crust

Question 27

how do divergent plate boundaries move

Answer 27

they come apart

Question 28

what are 2 examples of divergent plate boundary's

Answer 28

an MOR(Mid- Ocean Ridge, made up of oceanic crust) . The East African Rift( made up of continental)

Question 29

how do transform boundaries move?

Answer 29

slide by each other

Question 30

what is a specific example of a transform boundary

Answer 30

San Andres Fault

Question 31

what continental crust or involved with transform plate boundary

Question 32

what is a convenient current

Answer 32

1. magma heats up, becomes less dense, then it rises 2. magma cools down, more dense, then goes down/ sinks

Question 33

what are the other forces that helps plate movement

Answer 33

slab pull, ridge push, friction

Question 34

What two types of boundaries have shallow earthquakes?

Answer 34

divergent and transform boundaries

Question 35

which type of plate boundary has deep earthquakes?

Answer 35

convergent plate boundaries

Question 36

what are the type of stresses that can be applied to rocks?

Answer 36

compression, tension, shear, and torsion stress

Question 37

what are the two types of deformation?

Answer 37

elastic and plastic deformation

Question 38

what happens to a rock whenever elastic deformation happens

Answer 38

deforms then it returns to it's original shape

Question 39

what happens to a rock whenever plastic deformation happens

Answer 39

it deforms and stays in that new shape

Question 40

what are the Seismic Waves

Answer 40

primary,secondary, and surface

Question 41

what type of seismic waves move the fastest

Answer 41

primary

Question 42

how do primary waves move?

Answer 42

they are compression waves

Question 43

what type of materials do they move through

Answer 43

solids and liquids

Question 44

how do secondary waves move

Answer 44

transverse waves

Question 45

what type of material do secondary waves move through

Answer 45

solids

Question 46

which type of wave is most complex and causes the most damage

Answer 46

surface waves

Question 47

what are the scales used to measure earthquakes

Answer 47

richter and mercalli scale

Question 48

what does a richter scale tell us about an earthquake

Answer 48

the amount of energy released

Question 49

what does the mercalli scale tell us about an earthquake

Answer 49

the amount of damage done