PLATE PLATE TECTONICS TECTONICS 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 between the crust and core

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3
Q

core

A

made up of mostly iron separated into outer core (molten) and inner core (solid

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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 mantle (lithospheric plates )

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5
Q

continental drift theory

A

the theory that continents gradually drifted over time to their present positions.

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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 parts of a gas or liquid rise to the top and the cooler, denser parts sink.

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8
Q

covboundary

A

when two tectonic plates come together.

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9
Q

transform boundary

A

when tectonic plates slide past each other.

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10
Q

mountains

A

uplift of crustal plates that form landmasses

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11
Q

volcanoes

A

A vent or fissure in earth’s surface through which magma.

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12
Q

mid-ocean ridge

A

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

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13
Q

divergent boundary

A

when tectonic plates split apart.

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14
Q

fault

A

breaks in the crust. the movement cau

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15
Q

subduction zone

A

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

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16
Q

rift valley

A

A long narrow valley between two diverging continental plates.