Chapter 25 Flashcards

1
Q

System of mountains ranges on the seafloor separated by valleys

A

Mid-Ocean ridge ( MOR )

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2
Q

A long, Narrow depression called…

A

Rift Valleys

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3
Q

The Boundary where two plates collide is called….

A

Convergent Plate Boundary

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4
Q

The denser plate dives beneath the continent in a process called….

A

Subduction

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5
Q

The Boundary between two plates that are moving apart is called….

A

Divergent Plate Boundary

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6
Q

Type of boundary where plates slide horizontally past each other in opposite directions called…..

A

Transform Plate Boundary

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7
Q

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

A

Earthquake

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8
Q

a crack in Earth’s crust along which rock has moved

A

Faults

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9
Q

The Sudden release of strain energy as rock moves along a fault is called…

A

Elastic Bound

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10
Q

The point of origin for an earthquake is called….

A

Focus

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11
Q

The point on Earth’s surface directly above the focus is called….

A

Epicenter

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12
Q

Which type of plate boundaries have shallow earthquakes?

A

Divergent and transform boundaries

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13
Q

Which plate boundaries has deep earthquakes?

A

Convergent plate boundaries

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14
Q

What types of stress can be applied to rocks to cause movement?

A

Compression stress
A Tension stress
A shear stress
Torsion stress

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15
Q

What are the types of deformation that can be cause due to stress?

A

Elastic and Plastic

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16
Q

What happens to the material when elastic deformation happens ?

A

The object deforms and returns back to the original shape

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17
Q

What happen to the material when plastic when deformation happens?

A

Deforms and remains in a new shape

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18
Q

How many type of seismic waves are there?

A

3 Types of seismic

  • Primary waves
  • Secondary waves
  • Surface waves
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19
Q

Which wave moves at the fastest speed?

A

P Waves

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20
Q

What type of wave is a P wave?

A

A compression wave

21
Q

What type of material can P wave travel through?

A

Solid and liquids

22
Q

What type of wave are secondary waves?

A

Transverse

23
Q

What type of material can s waves travel through?

24
Q

Which wave is the most complex and damaging ?

A

Surface wave

25
What are the name of the two scales that measure earthquakes?
Richter scale | Mercalli scale
26
What does the richter scale tell us about an earthquake?
The amount of energy released
27
What does the Mercalli scale tells us about a earthquake ?
The amount of damage caused
28
Who came up with the Continental drift hypothesis?
Alfred Wegener
29
What where some pieces that supported his hypothesis?
1. Coastline matched like a puzzle piece 2. he looked at large land animal fossils 3. Mountain ranges matched up had similar rock type and age
30
What was the name of the cuper cont
Pangaea
31
Who came up with the Seafloor spreading Hypothesis?
Harry Hess
32
What did he use to come up with the Seafloor spreading hypothesis?
Sonar
33
Who discovered the Mid Ocean Ridge ?
Harry Hess
34
Where can we find the youngest rock on the Seafloor?
Close to the MOR
35
What are the three plate boundaries?
Convergent Divergent Transform
36
What are the two type of crust that deal with in class
Oceanic crust | Continental crust
37
How do convergent play boundaries move?
Collide together
38
What land forms are created when ocean crust and continental crust converged?
Volcanoes | Deep Sea Trench
39
Subduction happens with the which type of boundary?
Convergent
40
What type of land forms when two oceanic crust come together ?
Deep sea trenches | Hot spots which create lands
41
What type of land forms are created when two continental come together ?
Mountains
42
What kind of crust must be present for Volcanic activity to occur ?
Oceanic crust
43
How do divergent plates move?
They divide/ Move away from each other
44
What are specific example of divergent plate boundaries?
MOR ( Both are oceanic crust) | East African Rift ( Both Continental )
45
How do transform plates move ?
Slide past each other
46
What a specific example of a transform plate boundaries?
San Andreas Fault (both Continental)
47
What is a convection current?
!. Magma heats up, becomes less dense and rise | 2. Magma cools down, becomes more dense and sinks
48
What are other forces that helps in motion?
Slab pull Ridge push And friction