CH 25

Question 1

Mountain ranges on the seafloor separated by valleys

Answer 1

Mid-ocean ridge

Question 2

A long, narrow depression that forms in between peaks along the mid-ocean ridge

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 move apart along the mid-ocean ridge

Answer 5

Divergent plate boundary

Question 6

Boundary where plates slide horizontally past each other in opposite directions

Answer 6

Transform plate boundary

Question 7

A sudden movement of the ground that occurs when rocks slip along cracks in the Earth’s crust called faults

Answer 7

earthquake

Question 8

A crack in the Earth’s crust along which the rock moves

Answer 8

Fault

Question 9

Produces energy called seismic waves that travel in the Earth.

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

Who came up with the continental drift hypothesis?

Answer 12

Wegener

Question 13

Evidence that Wegnere found to support his hypothesis.

Answer 13

1. coast lines match up like puzzles pieces
2. Large land animal fossils
3. mountain ranges match up and the rocks are made up of the same compostion and age

Question 14

What was the name of the super continent?

Answer 14

Pangeea

Question 15

Who came up with the seafloor spreading hypothesis?

Answer 15

Harry Hess

Question 16

What did Harry Hess use to map the bottom of the seafloor?

Answer 16

Sonar

Question 17

Who discovered the mid-ocean ridge?

Answer 17

Harry Hess

Question 18

Where is the youngest rock on the ocean floor located?

Answer 18

MOR

Question 19

What are the types of plate boundary’s?

Answer 19

1. Divergent
2. Convergent
3. Transform

Question 20

How do convergent plate boundaries move?

Answer 20

The connect or come together

Question 21

subduction zones only occur with which type of plate boundary?

Answer 21

Convergent plate boundaries

Question 22

What two types of crust are involved in plate movement?

Answer 22

Oceanic and continental crust

Question 23

What are the types of land forms can be created when oceanic and continental crusts converge?

Answer 23

Volcanoes and deep sea trench

Question 24

What land forms can be created when two oceanic crusts converge?

Answer 24

deep sea trench and hot spots(creates islands)

Question 25

What land forms are created when two continental crusts converge?

Answer 25

Mountains

Question 26

How do divergent plate boundaries move?

Answer 26

Away from each other

Question 27

What are the two examples of divergent boundaries?

Answer 27

MOR and east African ridge

Question 28

How do Transform plate boundaries move?

Answer 28

They slide by each other

Question 29

What is a specific example of a transform plate boundary?

Answer 29

San Andreas Fault (2 continental crusts)

Question 30

How does a convection current work?

Answer 30

1. magma heats up, then rises, cools down | 2. cools down, sinks, goes down

Question 31

what are other forces that help plate movement?

Answer 31

Ridge push, slab pull, and friction

Question 32

what types of plate boundaries have shallow earthquakes?

Answer 32

Divergent and transform

Question 33

Which boundaries have deep earthquakes?

Answer 33

convergent plate boundaries

Question 34

What are the four types of stress that can be applied to rocks?

Answer 34

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

Question 35

What are the types of deformation?

Answer 35

elastic and plastic

Question 36

What happens to the rock if elastic deformation occurs?

Answer 36

as soon as the stress is released it returns to its original shape

Question 37

What happens to the rock if plastic deformation occurs?

Answer 37

as soon as the stress is released it remains in its new form

Question 38

What types of seismic waves are there?

Answer 38

primary, secondary,and surface waves

Question 39

Which type of seismic wave moves the fastest?

Answer 39

primary wave

Question 40

What type of wave is a p wave?

Answer 40

compression waves

Question 41

What type of wave is s wave?

Answer 41

Transverse

Question 42

What types of material can p waves move through?

Answer 42

solids and liquids

Question 43

What types of materials can s waves move through?

Answer 43

solids

Question 44

Which waves are the most complex?

Answer 44

Surface waves

Question 45

What are the two scales that help us measure earth quakes?

Answer 45

Ricther and mercali

Question 46

what does the ricther scale measure?

Answer 46

amount of energy released

Question 47

what does the mercali scale measure?

Answer 47

Damage caused