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physical science > Ch 25 > Flashcards

Ch 25 Flashcards

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Biology 101 flashcards
1
Q

Hess discovered a system of mountain ranges on the seafloor separated by valleys, which he called (MOR)

A

Mid-ocean ridge

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2
Q

A long, narrow depression called a rift valley forms in between peaks along the mid ocean ridge.

A

Rift valley

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3
Q

Is the boundary where two plates collide.

A

Convergent plate boundary

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4
Q

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

A

Subduction

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5
Q

The boundary between two plates that are moving apart.

A

Divergent plate boundary

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6
Q

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

A

Transform plate boundary

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7
Q

Is the sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in Earth´s crust fault

A

Earthquake

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8
Q

Is a crack in Earth´s crust along which rock has has moves.

A

Fault

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9
Q

This sudden releases of strain energy as rock moves along a fault.

A

Elastic rebound

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10
Q

The point of origin for an earthquake.

A

Focus

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11
Q

The point on Earth´s surfaces directly above the focus.

A

Epicenter

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12
Q

who came up with the continental drift hypothesis?

A

alfered wegener

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13
Q

what evidence supported alfered wegener hypothesis ?

A
  1. coast lines match up like puzzle pieces
  2. large land animals fossils were found
  3. Mountain ranges match up and the rocks are made up of the same composition and age
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14
Q

what was the name of the super continent?

A

Pangaea

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15
Q

Who came up with the seafloor spreading hypothesis

A

Harry Hess

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16
Q

how did harry Hess map the bottom of the sea floor

A

sonar

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17
Q

who discovered the MOR

A

Herry Hess

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18
Q

where is the youngest rock located the bottom of the sea floor

A

near the The mor

19
Q

what are the types of plate boundries

A

divergent convergent and trans

20
Q

how do the the convergent plates move

A
20
Q

how do the the convergent plates move

A

together

21
Q

subduction zone only occur with what type of plate boundry

A

\

22
Q

what two types of crust located

A

oceanic crust continental crust

23
Q

what type of land forms when oceanic and continental crust converge

A

deep sea trench and volcanoes

24
Q

what type of land forms can be created?

A

deep sea trench, hot spots ¨creates island ¨

25
Q

what land forms are created when two continental crust coverage?

A

mountains

26
Q

how do divergent plate boundaries move

A

move apart

27
Q

what are the two examples of the divergent boundariest

A

MOR and the East African

28
Q

how do plate boundaries move?

A

they slide by each other Horizontally

29
Q

what is a specific exsample of Transforms Boundry plates

A

the San Andreas fault {two continental crust}

30
Q

how does a convection current work

A

magma heats up, becomes less dense, then rises, magma cools down, becomes more dense , and sinks

31
Q

what types of plate boundaries have shallow earthquakes

A

divergent and transforms

32
Q

which boundaries have deep earthquakes.

A

convergent plate boundaries

33
Q

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

A

compression stress tension stress shear stress and torsion stress

34
Q

what are the types of deformation

A

elastic plastic deformation

35
Q

what happened to the rock if elastic deformation occurs?

A

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

36
Q

what happened to the rock if plastic deformation occurs?

A

soon as the stress is released it remains in the new shape

37
Q

what types of seismic waves are there

A

primary wave secondary waves and surface waves

38
Q

which types of waves moves the fastest

A

p-wave

39
Q

how do primary waves move

A

to compression wave

40
Q

what types of materials can p-waves move through

A

solids and liquids

41
Q

what types can materials can s-wave move through

A

only solids

42
Q

which waves are the most complex

A

seismic waves

43
Q

what are the two scales that helpus measure earthquakes

A

mercalli and the richrter scale

physical science (6 decks)

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