Ch 25

Question 1

Mid-Ocean Ridge

Answer 1

Hess discovered a system of mountains ranges on the seafloor separated by valleys

Question 2

Rift Valley

Answer 2

A long, narrow depression

Question 3

Convergent Plate Boundary

Answer 3

The boundary where two plates collide

Question 4

Subduction

Answer 4

When a denser plate dives beneath a less dense plate

Question 5

Divergent Plate Boundary

Answer 5

Two plates move along a mid-ocean ridge.

Two moving plates apart

Question 6

Transform Plate Boundary

Answer 6

Plates slide horizontally past each other in the opposite direction

Question 7

Earthquake

Answer 7

when tectonic plates move in the Earths crust

Question 8

Fault

Answer 8

responsibility for an accident or misfortune

Question 9

Elastic Rebound

Answer 9

what happens to the crustal material on either side of a fault during an earthquake

Question 10

Focus

Answer 10

the center of interest or activity

Question 11

Epicenter

Answer 11

the point on the Earth’s surface directly above a hypocenter or focus

Question 12

Who came up with the Continental Drift hypothesis.

Answer 12

Alfred Wegener

Question 13

what were some evidence that Wegener used to support his hypothesis

Answer 13

1. Fossils(Large Land Animals Fossils)
2. Coast Line( matched up like puzzle pieces)
3. Mountain Ranges( matched up with same rock type and ages)

Question 14

What was the name of the Super Continent

Answer 14

Pangia

Question 15

Who came up with the Sea Floor Hypothesis

Answer 15

Harry Hess

Question 16

How did he discover Seafloor Spreading Hypothesis

Answer 16

Sonar

Question 17

What are the three types of plate boundaries

Answer 17

Divergent boundary, Convergent boundary, Transform boundary

Question 18

subduction zones only happen with what type that boundaries

Answer 18

convergent plate boundaries

Question 19

How do Divergent Plate Boundary’s move?

Answer 19

They divide( They move apart)

Question 20

What are some examples of Divergent Plate Boundarys

Answer 20

1. Mid Ocean Ridge(Oceanic Crust)

2. East African Rift( 2 Continental Crust)

Question 21

How do Transform Plate boundary’s move

Answer 21

Slide past each other

Question 22

what is a example of a transform Boundary

Answer 22

San Andres Fault ( Continental Crust )

Question 23

What is a Convection Current

Answer 23

1. Magma heats up, becomes less dense and rises

2. Magma cools down and gets dense, then sinks down

Question 24

What plate boundary has shallow earthquakes

Answer 24

Divergent and Transform

Question 25

Which plate boundary has deep earthquakes

Answer 25

Convergent

Question 26

What type of stress that acts upon rock moment

Answer 26

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

Question 27

What are the two types of deformation

Answer 27

1. Elastic

2. Plastic

Question 28

What happens to the rock or the material when elastic deformation happens

Answer 28

The material goes back to its original shape

Question 29

What happens to the rock or the material when plastic deformation happens

Answer 29

It takes on a new shape

Question 30

How many types of seismic waves are there

Answer 30

1. Primary
2. Secondary
3. Surface

Question 31

What type of seismic Wave is the fastest

Answer 31

P-Waves

Question 32

What type of wave is a primary wave

Answer 32

It’s a compression wave

Question 33

What type of materials can P-wave pass through

Answer 33

1. Solids

2. Liquids

Question 34

What type of wave is an s-wave

Answer 34

Transverse

Question 35

What type of materials can an s-wave pass through

Answer 35

1. Solids

Question 36

Which wave is the most does the most damage

Answer 36

Surface waves

Question 37

What are the two scales help measure earthquakes

Answer 37

1. Richter Scale

2. Mercalli Scale

Question 38

What does the Richter scale measure in a earthquake

Answer 38

The amount of energy

Question 39

What does the Mercalli scale measure

Answer 39

The amount of measurable damage