Chapter 25

Question 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 from earths mantle

Answer 1

mid-ocean ridge

Question 2

a long narrow depression formed in between the peaks along the mid-oceanic ridge

Answer 2

rift valley

Question 3

boundary where two plated collide, produces either subduction zones or continental collisions

Answer 3

convergent plate boundary

Question 4

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

Answer 4

subduction

Question 5

a boundary between two plates that are moving apart

Answer 5

divergent plate boundary

Question 6

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

Answer 6

transform plate boundary

Question 7

sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in Earths crust

Answer 7

earthquake

Question 8

cracks in earths crust along which rock has moved

Answer 8

fault

Question 9

the sudden release of strain energy from rock as it moves along a fault

Answer 9

elastic rebound

Question 10

point of origin for an earthquake, the point from which seismic waves originate

Answer 10

focus

Question 11

the point on earths surface directly above the focus of an earthquake

Answer 11

epicenter

Question 12

who came up with the Continental drift hypothesis?

Answer 12

Alfred Weneger

Question 12

what evidence did Weneger find to back up his hypotheses

Answer 12

1. fossils (or Large animals fossils)
2. Cost Lines
3. Mountain and Ranges with same rock type and ages.

Question 13

what is the name of the super continent

Answer 13

Pangaea

Question 14

who came up with the seafloor spreading hypothesis

Answer 14

Harry Hess

Question 15

How did he discover seafloor setting

Answer 15

he used sonar

Question 16

Hess discovered what with the sonar

Answer 16

He discovered the mid-ocean ridge

Question 17

What are the types of plate boundary

Answer 17

1. Convergent boundaries
2. Divergent boundaries
3. Transform boundaries

Question 18

How many transform plate boundaries are there?

Answer 18

1 which is the Caribbean plate

Question 19

how do convergent plate boundaries move?

Answer 19

together, collide, or converge —->

Question 20

sebduction zones only happen with which type of plate boundary

Answer 20

Convergent Boundary

Question 21

What two types of crust that are used with plate boundary

Answer 21

oceanic crust and the continental crust

Question 22

if we have oceanic crust and continental crust what land forms do we have?

Answer 22

Volcanoes

Question 23

what type of land form will you have if two oceanic crust merge together

Answer 23

deep sea trench, or hot spots that create chain island (or volcanic island)

Question 24

what type of land forms is created if two continental crust merge together

Answer 24

mountains

Question 25

what type of crust must be present for a volcanic activity to occur

Answer 25

oceanic crust

Question 26

how do divergent plate boundary move?

Answer 26

they move away from each other

Question 27

what are some examples of divergent plate boundaries?

Answer 27

1. MOR (Mid-Ocean-Ridge) (Two oceanic crust
2. East African Rift
   3.

Question 28

how do transform plate boundary move?

Answer 28

They slide past each other

Question 29

What is a specific example of a transform plate boundary

Answer 29

San Andrea Fault (Continental crust)

Question 30

What is a Convection Current

Answer 30

1. Magma heats up, becomes less dense, and rises.

2. Magma cools, becomes more dense, and sinks

Question 31

What are three forces that plates in motion.

Answer 31

1. Slab pull
2. Ridge push
3. Friction

Question 32

which plate boundaries have shallow earthquake

Answer 32

divergent and transform

Question 33

Which plate boundary have deep earthquake

Answer 33

convergent plate boundary

Question 34

what are the type of stress that can act upon rocks movement

Answer 34

1. compression stress
2. tension stress
3. shear stress
4. torsion stress

Question 35

_________ _________
/ \ / \
\ /______\ /
/ \
| |
| |
\ /
\ ________________________ / /

Question 36

What are the two types of deformation

Answer 36

1. Elastic

2. Plastic

Question 36

What are the two types of deformation

Answer 36

1. Elastic

2. Plastic

Question 37

what happens to the material when Elastic deformation happens.

Answer 37

The material goes back to its original shape.

Question 38

what happens to the material when Plastic deformation happens.

Answer 38

It takes on a new shape

Question 39

how many Seismic waves are there

Answer 39

1. Surface wave
2. body wave
3. Primary wave
4. Compression wave

Question 40

What type of Seismic waves are the fastest

Answer 40

Primary waves (P-waves)

Question 41

What type of wave is a primary wave

Answer 41

Compression wave

Question 42

What type of material can primary wave move through

Answer 42

Solids and liquids.

Question 43

What type of wave is a S-wave

Answer 43

transverse wave

Question 44

What type of materials can the S-wave pass through

Answer 44

Solids

Question 45

Which waves is the most complex and does more damage.

Answer 45

Surface wave

Question 46

What are the two scales that help measure earthquakes

Answer 46

1. The Richter scale

2. Mercalli

Question 47

What does the Richter scale measure about an earthquake

Answer 47

the amount of energy

Question 48

What does the Mercalli scale measure about the earthquake.

Answer 48

which is the amount of visible damage.