Ch.25

Question 1

MOR

Answer 1

(MOR) system

Question 2

Rift valley

Answer 2

Forms in between peaks along the mid-ocean ridge.

Question 3

Convergent plate boundary

Answer 3

The boundary where two plates collide

Question 4

Subduction

Answer 4

When a thick and buoyant continental plates meet a thin and dense oceanic plate, the denser plate dives beneath the continent in a process

Question 5

Divergent plate boundary’s

Answer 5

The boundary between two plates that are moving apart

Question 6

Transform plate boundary

Answer 6

This type of boundary where plates slide horizontally past each other in opposite directions

Question 7

Earthquake

Answer 7

Is the sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in the earths crust calls faults

Question 8

Faults

Answer 8

Is a crack in earths crust along which rock has moved

Question 9

Elastic rebound

Answer 9

The sudden release of strain energy as rock moves along a fault

Question 10

Focus

Answer 10

The point of origin for an earthquake

Question 11

Epicenter

Answer 11

The point on earths surface directly above the focus

Question 12

Who came up with the continental drift hypothesis?

Answer 12

Alfred wegener

Question 13

What evidence did he find to back up his hypothesis?

Answer 13

1) fossils (land animal)
2) coastline (match up)
3) mountain ranges (match up with some rock time and age)

Question 14

What is the name of the super contenate?

Answer 14

Pangaea

Question 15

Who came up with sea floor spreading hypothesis?

Answer 15

Harry hess

Question 16

How did he discover sea floor spreading?

Answer 16

Sonar

Question 17

What are the 3 types of plate boundary?

Answer 17

1) Divergent boundary (divid)
2) convergent (collide)
3) transform (slide past each other)

Question 18

How did convergent boundary move?

Answer 18

Collide (come together)

Question 19

Subduction zones only happen with which type of plate boundary?

Answer 19

Convergent

Question 20

What two types of crust that are used with plate boundary?

Answer 20

Volcanos

Question 21

If two crust come together what do they form?

Answer 21

1) Deep sea trench

2) volcano islands

Question 22

What type of land form happens when two continental crust collide?

Answer 22

Mountains

Question 23

What type of crust must be present for volcanic activity to happen?

Answer 23

Oceanic crust

Question 24

How do divergent plate boundary move?

Answer 24

The move away from each other

Question 25

What are some examples of divergent plate boundary?

Answer 25

1) MOR (mid-ocean ridge) | 2) East African rift (2 continetal crust)

Question 26

What is a specific example of a transform plate boundary?

Answer 26

The San Andreas fault (continetal crust)

Question 27

What is a convection current?

Answer 27

1)magma heats up,becomes lease dense and sinks

Question 28

What are 3 force to contribute to plate motion?

Answer 28

1) slab pull 2) ridge push 3) friction

Question 29

is the measure of a fluids resistance to flow

Answer 29

viscosity

Question 30

is the chimical compound silicon dioxide,which is s a common ingredient in most magma.

Answer 30

silica

Question 31

tender to be small,have heights in the hundreds of meters range,and have short eruptions cycles.

Answer 31

Cinder cone volcanoes

Question 32

are broad,flat structures composed of layer upon layer of lava flow.

Answer 32

shield volcanoes

Question 33

larger and steep-sided,often thousands of meters high and tens of kilometers across the base,and composed of layers of both lava and ash

Answer 33

composite volcanoes

Question 34

what is molted or liquid rocks stored inside earth?

Answer 34

magma

Question 35

where is the ring of fire located?

Answer 35

pacific ocean

Question 36

what is created when tectonic plate collide along the subduction zone?

Answer 36

volcanoes

Question 37

what are two specific examples of volcanic activity due to divergents?

Answer 37

mid Atlantic ridge/East African rift

Question 38

are hotspots stationary?

Answer 38

yes

Question 39

what is created from hotspots?

Answer 39

islands(hawaii)

Question 40

if a liquid as a higher viscosity will it flow more slowly or more quickly?

Answer 40

more slowly

Question 41

if magma has high viscosity will it contain more or less silica?

Answer 41

more

Question 42

what is pyroclastic material?

Answer 42

any solid materal that erupes from a volcanoe

Question 43

what is the smallest type of pyroclastic material?

Answer 43

valcoanic ash

Question 44

what is the largest type of pyroclastic material?

Answer 44

volcanic blocks ans bombs

Question 45

what are the types of gases that erupt from volcanoes?

Answer 45

water vaper,carbin dioxide,sulfer dioxide

Question 46

how are volcanoes classified?

Answer 46

size,shape, and the materials that erupt

Question 47

what are the 3 types of volcanoes

Answer 47

cinder cone,composite,and shield volcanoes