Plate Tectonics Flashcards

0
Q

Continental drift

A

Continents suggested that continents are in constant motion on the surface of earth

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1
Q

Pangaea

A

A super continent with all the continents combined together

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2
Q

Alfred wegener

A

German scientist that proposed theory of continental drift and Pangaea

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3
Q

Seafloor spreading

A

Process that creates new oceanic trust that forms along a mid ocean ridge and oceanic crust move away from the ridge

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4
Q

Mid ocean ridge

A

Mountain ranges in the middle of the oceans

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5
Q

Plate tectonics

A

Earths surface is made of rigid slabs of rock or plates that move with respect to each other

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6
Q

Plates

A

Earths surface is broken up to pieces

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7
Q

Lithosphere

A

The cold and rigid outermost rock later

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8
Q

Asthenosphere

A

Hot silly putty like mantle

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9
Q

Plate boundary

A

Where plates interact and touch

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10
Q

Divergent plate boundary

A

Two plates seperate
Melt
Form volcanoes and earthquakes

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11
Q

Convergent plate boundary

A

O-C (ocean subducts)
C-C (no subduction)
O-O (older plate subducts

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12
Q

Rift valley

A

When crust is pulling apart and breaks apart(hole in between)

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13
Q

Subduction

A

Denser plate sinks below the more buoyant plate

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14
Q

Transform plate boundary

A

Forms where 2 plates slide past each other.

No subduction

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15
Q

Convection current

A

Circulation of material cause by differences in temp. And density

Process when hot mantle rises and cold mantle sinks

16
Q

Subduction zone

A

Area where denser plate descends into earth along a convergent plate boundry