Plate Tectonics Flashcards

1
Q

states that the earth’s outer mechanical layer, the lithosphere, is divided into large continent–sized plates that are constantly moving.

A

Plate Tectonics Theory

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2
Q

are where the plates meet

A

Boundaries

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3
Q

3 Types of Plate Tectonics Boundaries

A
  • convergent boundary
  • divergent boundary
  • transform boundary
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4
Q

what type of P.B:
β†’ ←

A
  • Convergent
  • collides or towards
  • causes earthquake
  • forms volcanoes and mountains
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5
Q

what type of P.B:
← β†’

A
  • Divergent
  • away or spread apart
  • fissures, cracks, and rifts occurs in the surface
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6
Q

what type of P.B:
↑↓

A
  • Transform
  • slide past each other
  • causes earthquake and tsunami
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7
Q

Major Plate Tectonics

A
  1. Pacific Plate
  2. North American Plate
  3. Eurasian Plate
  4. African Plate
  5. Antartic Plate
  6. Indo-Australian Plate
  7. South American Plate
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8
Q

Minor Tectonic Plates

A
  1. Nazca Plate
  2. Philippine Plate
  3. Arabian plate
  4. Caribbean Plate
  5. Cocos Plate
  6. Scotia Plate
  7. Juan de Fuca Plate
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9
Q

2 types of layers of the earth

A

compositional (chemical)
mechanical (physical)

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10
Q

are determined by their components or materials/elements

A

Compositional layers

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11
Q

are determined by their physical properties or behavior/mechanism that happen in each layer

A

Mechanical layers

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12
Q

Compositional Layers

A
  1. crust
  2. mantle
  3. core
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13
Q

Crust

A

outermost and thinnest layer of the earth

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14
Q

Mantle

A

The thickest and most massive layer. The planet’s mantle consist of MAGMA

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15
Q

Core

A

the innermost layer which is divided into separate regions. mostly made of IRON and NICKEL
- inner outer core
- solid inner core

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16
Q

Mechanical Layers

A
  1. Litosphere
  2. Asthenosphere
  3. Mesosphere
  4. Outer Core
  5. Inner Core
17
Q

Litosphere

A

the solid outer part of the earth, including brittle upper portion of mantle and crust

18
Q

Asthenosphere

A

the denser weaker layer beneath lithosperic mantle (not liquid). made of MAGMA

19
Q

Mesosphere

A

located beneath the asthenosphere. It encompasses the lower mantle, where material still flows but at a much slower
rate than the asthenosphere.

20
Q

Outer core (liquid)

A

extremely high temp that melt the metals

21
Q

Inner core (solid)

A

extremely high temp but it is in a solid form

22
Q

Why inner core isnt liquid?

A

due to extreme pressure.

23
Q

2 Types of Crust

A
  • Continental Crust
  • Oceanic Crust
24
Q

Continental crust

A
  • thick, less dense and old
  • 25 miles thick under the continents
  • composed of GRANITE
25
Q

Oceanic crust

A
  • thin, dense, sinks under and young
  • 3-5 miles thick under the oceans
  • composed of BASALT
26
Q

Transition zones

A

Discontinuities

27
Q

Conrad Discontinuity

A
  • Victor Conrad
  • upper and lower crust
28
Q

Moho/Mohorovicic discontinuity

A
  • Andrija Mohorovicic
  • lower crust and upper mantle
29
Q

Repetti discontinuity

A
  • William C. Repetti
  • upper and lower mantle
30
Q

Gutenburg discontinuity

A
  • Beno Gutenburg
  • lower mantle and outer core
31
Q

Lehmann discontinuity

A
  • Inge Lehmann
  • outer and innner core
32
Q

oceans in the world

A
  1. Pacifi Ocean
  2. Arctic Ocean
  3. Atlantic Ocean
  4. Indian Ocean
33
Q

continents in the world

A
  1. Asia
  2. Africa
  3. North America
  4. South America
  5. Antartica
  6. Europe
  7. Australia
34
Q

largest and smallest ocean in the world

A

largest: Pacific Ocean
smallest: Arctic Ocean

35
Q

largest and smallest continent in the world

A

largest: Asia
smallest: Australia