chapter 25

Question 1

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

Answer 1

Earthquake

Question 2

a system of mountain range on the ocean floor separated by valleys.

Answer 2

Mid-ocean-ridge

Question 3

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

Answer 3

rift valley

Question 4

boundary where two plates collide

Answer 4

converting plate boundary

Question 5

the denser plate dives beneath the continent

Answer 5

subduction

Question 6

boundary between two plates moving apart

Answer 6

divergent plate boundary

Question 7

slide horizontally in opposite directions.

Answer 7

transform plate boundary

Question 8

a crack in the earths surface

Answer 8

fault

Question 9

sudden release of tension wile rocks slide along

Answer 9

elastic rebound

Question 10

the point of oragin of an earthquake

Answer 10

focus

Question 11

earth above the focaus

Answer 11

epicenter

Question 12

Who came up with the continental drift hypothesis?

Answer 12

Alfrid Wegener

Question 13

What was some evidence did Wegener find to support his hypotheses.

Answer 13

1 large land animal fossle

2 coast lines matched up

3 mountain ranges matched up with same rock type and ages

Question 14

what was the name if the supper continent?

Answer 14

Pangaea

Question 15

Who came up with the seafloor spreading hypothesis?

Answer 15

Harry Hess

Question 16

How did he discover seafloor spreading?

Answer 16

using sonar

Question 17

What did hess discover?

Answer 17

The mid-ocean-ridge

Question 18

What are the 3 types of plate boundaries?

Answer 18

1 divergent
2 convergent
3 transform

Question 19

how do convergent faults collide

Answer 19

to toward each other\into each other

Question 20

subducton zones only happen with witch type of plate boundary

Answer 20

convergent

Question 21

what 2 types of crust are there?

Answer 21

oceanic

continental

Question 22

What can be formed when a oceanic crust and a continental crust converge.

Answer 22

volcano

trenches

Question 23

what can form when 2 oceanic crusts converge

Answer 23

beep sea trench

hot spots volcanic islands.

Question 24

what land formed are created when 2 Continental crusts converge.

Answer 24

mountains

Question 25

what type of crust must be present for c=volcanic activity to ocure

Answer 25

oceacic

Question 26

How do divergent plates move?

Answer 26

away from each other/ away from

Question 27

What are some examples if divergent plats

Answer 27

1 MOR- 2 oceanic | 2 East African Rift - 2 Continental

Question 28

How do transform plates move?

Answer 28

slide along each other (only one)

Question 29

what is an example of a transforming plate boundary

Answer 29

San Andreas fault - 2 Continental

Question 30

What is a convection current?

Answer 30

1. magma heats up, become less dense, and rises | 2. magma cools and becomes more dense and sinks.

Question 31

what are three forces that contribute to plate motion

Answer 31

1 slab pull 2 ridge push 3 friction between plates

Question 32

Witch plate boundaries has shallow earthquakes?

Answer 32

Divergent and Transform

Question 33

Witch plate boundary has deep earthquakes.

Answer 33

Convergent

Question 34

What are the types of stress that can be applied to rock movement.

Answer 34

Compression tension sheer torsion

Question 35

compression, tension, sheer, torsion

Answer 35

push together, pull, slide along, twist

Question 36

what are the 2 types of deformation.

Answer 36

elastic | plastic

Question 36

what happens when elastic deformation happens

Answer 36

materiel goes back to original state

Question 37

what happens when plastic deformation occurs

Answer 37

takes on a new shape

Question 38

how many types of seismic waves are there

Answer 38

3 primary- p waves secondary- s waves surface waves

Question 39

what type of seismic waves are the fastest

Answer 39

primary/ p-wave compression wave

Question 40

what type of wave is a p-wave

Answer 40

compression wave

Question 41

what type of material can p-waves go through

Answer 41

solids and liquids

Question 42

What type of wave is a s-wave

Answer 42

transverse wave

Question 43

what type of materials can a s-wave pass through

Answer 43

only solids

Question 44

witch wave dose the most damage

Answer 44

surface waves

Question 45

what are the 2 scales that measure earthquakes

Answer 45

Richter scale | mercalli scale

Question 46

what dose the richter scale measure

Answer 46

the amount of energy released

Question 47

what dose the mercalli scale measure?

Answer 47

the amount of damage.