Plate Tectonics Vocabulary Flashcards

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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 Iron. Separated into the outer core and inner core

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4
Q

Tectonic plate

A

The layer of rock that makes up the outer part of the earth. including the crust and upper inclued

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5
Q

Continental Drift Theory

A

The theory That continents gradually drifted over time to their present position.

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6
Q

Asthenosphere

A

A thin layer of earth. about 150 miles thick, at the border and the crust.

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7
Q

convection currents

A

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

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8
Q

convergent boundary

A

when two tectonic plates come together.

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9
Q

mountains

A

uplift of crustal plates that form elevated landmasses.

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10
Q

volcanoes

A

A vent or fissure in earths surface though

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11
Q

divergent boundary

A

When tectonic plates split apart.

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12
Q

transform boundary

A

When tectonic plates slide past each other.

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13
Q

fault

A

Breaks in the crust. The movement cause semismic waves which produce earthquakes

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14
Q

fault

A

Breaks in the crust. The movement cause seismic waves which produce earthquakes

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15
Q

mid ocean ridge

A

a long ridge of underwater volcanoes between two diverging oceanic plates.

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16
Q

subduction zone

A

A place where one tectonic plate sinks under another and melts. Also forms a trench.

17
Q

rift valley

A

A long narrow valley between two diverging continental plates.