Plate Tectoics Flashcards

1
Q

CRust

A

The outermost shell of a rocky planet

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2
Q

Mantle

A

Layer of molten rock between the crust and core

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3
Q

Core

A

Made up of mostly lron. Separated into the outer core ( molten )
and inner core ( solid)

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4
Q

Tectonic plant

A

The layer of rock that makes up the outer part of the Earth , including the crust and upper mantle ( lithospheric plates)

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5
Q

Continetal Drift theory

A

The theory that continents gradually difted over time to their present positione.

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6
Q

Asthenosphere

A

A thin layer of Earth, about 150 miles thick, at the border between the mantle and the crust

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7
Q

Convection current

A

The process in which the hotter of a gas or liquid rise to the top and the cooler, denser parts sink

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8
Q

convergent Boundaey

A

When two tectonic plantes come togther

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9
Q

Volcanoes

A

A vent or fissure in Earth’ s surface through which magma and gasses are expelled

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10
Q

Divergent Boundary

A

when tectonic lates split apart

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11
Q

Transforom Baundary

A

When tectonic plates slide past each other

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12
Q

Fault

A

Breaks in the crust. The movement causes seismic waves which produces earthqukes

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13
Q

Mio- Ocean Ride

A

A Long ridge of underwater volcanoes between two diverging oceanic plates

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14
Q

Subdcction Zone

A

A place where where one tectonic plate sinks under anther and malts. Also forms a trench.

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