Plate Tectonics/Volcanoes/HotSpots/Seafloor Spreading

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What is Plate Tectonics?

Back

The theory that explains the structure and movement of Earth's lithosphere, which is divided into tectonic plates that float on the semi-fluid asthenosphere.

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What is a Hotspot?

Back

A location on the Earth's surface that has experienced active volcanism for a long period of time, often associated with a plume of hot material rising from the mantle.

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What is Seafloor Spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges and gradually moves away from the ridge, leading to the expansion of ocean basins.

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What evidence supports the theory of Continental Drift?

Back

Similar rock types and fossils found on opposite sides of the Atlantic Ocean, as well as the fit of continental coastlines.

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What is a Magma Plume?

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A column of hot, solid material that rises from deep within the Earth, often associated with volcanic activity.

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How do tectonic plates move?

Back

Tectonic plates move due to convection currents in the mantle, which are caused by the heat from the Earth's core.

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What is the Ring of Fire?

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A major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur, due to tectonic plate boundaries.

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What is the difference between oceanic and continental crust?

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Oceanic crust is thinner and denser than continental crust, which is thicker and less dense.

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What is Subduction?

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The process by which one tectonic plate moves under another plate and sinks into the mantle.

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What are Transform Boundaries?

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Boundaries where two tectonic plates slide past each other horizontally, often causing earthquakes.