Vocabulary Continental Drift and Plate Tectonics PD1 Flashcards

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1
Q

What is the crust

A

The outermost shell of a rocky planet.

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2
Q

What is the mantle

A

Layer of molten rock between the crust and core

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3
Q

what is the core

A

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

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4
Q

what is a 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

What is the Continental Drift Theory

A

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

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6
Q

what is the 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

What is the 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

What is the Convergent Boundary

A

When two tectonic plates come together.

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9
Q

What are Mountains

A

Uplift of crustal plates that form elevated landmasses.

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10
Q

what are Volcanoes

A

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

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11
Q

what is Divergent Boundary

A

When tectonic plates split apart.

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12
Q

what is Transform Boundary

A

When tectonic plates slide past each other.

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