ch 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 range

Question 2

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 dence oceanic plate under a buoyant continental plate.

Answer 4

subduction

Question 5

The boundary between two plates that are moving apart.

Answer 5

Divergent plate boundary

Question 6

Tectonic plate boundary in witch plates side 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 along enormous cracks in earths crust.

Answer 7

Earthquake

Question 8

Crack in earths crust along along witch rock has moves.

Answer 8

Fault

Question 9

The sudden release of stain 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 wegener

Question 13

What are some evidence for the continental drift?

Answer 13

1. The coastal lines match up like a puzzle peace.
2. Mountain ranges with the same rock type
3. Fossil

Question 14

what was the super continental draft?

Answer 14

Pangaea

Question 15

Who came up with the Seafloor spreading hypothesis?

Answer 15

Harry Hess

Question 16

How did Harry Hess discover seafloor spreading hypotheses?

Answer 16

he used sonar

Question 17

What did Harry Hess discover using sonar?

Answer 17

mid-ocean ridge

Question 18

On the ocean floor where is the newer rock formed?

Answer 18

closer to the MOR

Question 19

What are the three types of plate boundary?

Answer 19

1. divergent boundary
2. convergent boundary
3. transform boundary

Question 20

How do convergent plate boundaries move?

Answer 20

the collide together

Question 21

Abduction only happens with witch type of plate boundary?

Answer 21

convergent plate boundaries

Question 22

What types of crusts do we have?

Answer 22

1. continental crust

2. oceanic crust

Question 23

what crust has to be present for volcanic action to occur?

Answer 23

oceanic crust

Question 24

if two Continental crust convert what will happen?

Answer 24

a mountain with be formed

Question 25

if an oceanic crust and a Continental crust coverage what with happen?

Answer 25

a deep sea trench and volcanoes

Question 26

what can be created when two oceanic crust come together?

Answer 26

deep sea trench and volcanic islands

Question 27

What do hot spots create?

Answer 27

volcanic islands

Question 28

How do Divergent Plate Boundaries move?

Answer 28

the move away from each other

Question 29

What is an example of Divergent Plate Boundaries?

Answer 29

1. MOR (only oceanic) | 2. East Africa Rift(only continental)

Question 30

How do Transform Plate Boundaries move?

Answer 30

They slide horizontally past each other

Question 31

What is an example of a Transform Plate Boundaries?

Answer 31

San Andreas

Question 32

What types of crust are involved with Transform plate boundaries?

Answer 32

only continental

Question 33

What is a Convection current?

Answer 33

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

Question 34

witch plate boundaries have shallow earthquakes?

Answer 34

divergent and transform

Question 35

witch plate boundaries have a deeper earthquake?

Answer 35

convergent

Question 36

what are the four types of stress are applied to rock that can cause earthquakes?

Answer 36

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

Question 37

what are the two types if deformation?

Answer 37

elastic and plastic

Question 38

what happens during elastic deformation?

Answer 38

when the stress is removed it returns to its original shape.

Question 39

what happens during plastic deformation?

Answer 39

remains in new shape when the stress is released.

Question 40

how many sizemic waves are there?

Answer 40

there are three seismic waves. 1. primary waves 2. secondary waves 3. surface waves

Question 41

what are the two types of body waves?

Answer 41

primary waves and secondary waves

Question 42

what type of wave is primary wave?

Answer 42

compression

Question 43

what is the fastest waves?

Answer 43

primary waves

Question 44

what type of materials do p-waves travel through?

Answer 44

solid and liquid

Question 45

what type of wave is secondary?

Answer 45

transverse waves

Question 46

what type of material do s-waves travel through?

Answer 46

only solids

Question 47

what types of waves do the most damage?

Answer 47

surface waves

Question 48

what are the two scales to measure earthquakes?

Answer 48

1. Richter | 2. mercralli

Question 49

what does the rchter scale measure?

Answer 49

the amount of energy realest

Question 50

what does the macalli scale measure?

Answer 50

the amount of damage