The Theory of Plate Tectonics

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What is the Theory of Plate Tectonics?

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The Theory of Plate Tectonics explains how the Earth's outer shell, or lithosphere, is divided into several plates that glide over the semi-fluid asthenosphere beneath. This movement causes geological phenomena such as earthquakes, volcanic activity, and the formation of mountains.

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What are tectonic plates?

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Tectonic plates are large, rigid pieces of the Earth's lithosphere that move and interact with one another. Their movements are responsible for many geological events.

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What is a convergent boundary?

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A convergent boundary is where two tectonic plates collide or move towards each other, often resulting in mountain formation, earthquakes, or volcanic activity.

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What is a divergent boundary?

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A divergent boundary is where two tectonic plates move apart from each other, leading to the formation of new crust, often seen at mid-ocean ridges.

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What is a transform boundary?

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A transform boundary is where two tectonic plates slide past each other horizontally, which can cause earthquakes.

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What causes tectonic plates to move?

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Tectonic plates are primarily moved by convection currents in the Earth's mantle, which are caused by the heat from the Earth's core.

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What is subduction?

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Subduction is the process where one tectonic plate is forced under another plate, often leading to volcanic activity and the formation of deep ocean trenches.

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Why does oceanic crust subduct under continental crust?

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Oceanic crust subducts under continental crust because it is denser than continental crust.

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What is an earthquake?

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An earthquake is the shaking of the Earth's surface caused by the sudden release of energy in the Earth's lithosphere, often due to tectonic plate movements.

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What is a volcano?

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A volcano is an opening in the Earth's crust through which molten rock, ash, and gases escape, often formed at convergent or divergent boundaries.