What is theory of plate tectonics?

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Plate tectonic is the theory that the outer rigid layer of earth (the lithosphere) is divided into couple of dozen  ' plates' that move around across the earth's surface relative to each other,  like slabs of ice on a lake.

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The theory of plate tectonics states that our earth crust is made up of different plate. This theory was invented by Alfred Wegener in the year 1915. In this theory it is considered that earth crust is made up of 7 major and 5 minor plates.

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Plate tectonics is the theory that the outermost layer of the earth is divided into couple of plates that always move around the earth's surface.

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Our Earth's crust is split or broken into smaller parts known as crustal plates. That crustal plate is never static, that moves relative to each other. such moving plates are called Tectonic Plates. The science which deals with the movement of tectonic plates is called plate tectonics.

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Theory of Plate Tectonics

The theory of plate tectonics is a scientific concept that explains the movement and interaction of the Earth's lithosphere, which is composed of several large and small tectonic plates. These plates are like puzzle pieces that fit together to form the Earth's surface. The theory suggests that the lithosphere is divided into a number of rigid plates that float on the semi-fluid asthenosphere below.

Continental Drift Hypothesis

The theory of plate tectonics is rooted in the continental drift hypothesis proposed by German scientist Alfred Wegener in the early 20th century. Wegener observed that the continents seemed to fit together like a jigsaw puzzle and proposed that they were once joined in a supercontinent called Pangaea. Over time, the continents drifted apart to their current positions.

Plate Boundaries and Interactions

The theory of plate tectonics explains the movement and interactions of these tectonic plates at their boundaries. There are three main types of plate boundaries:

1. Divergent Boundaries: These boundaries occur when plates move away from each other. As the plates separate, magma rises from the asthenosphere, creating new crust. This process is called seafloor spreading and results in the formation of mid-oceanic ridges.

2. Convergent Boundaries: These boundaries occur when plates collide. There are three types of convergent boundaries: oceanic-continental, oceanic-oceanic, and continental-continental. When an oceanic plate collides with a continental plate, the denser oceanic plate subducts beneath the continental plate, creating a subduction zone. This can lead to the formation of volcanoes, mountain ranges, and deep ocean trenches.

3. Transform Boundaries: These boundaries occur when plates slide past each other horizontally. The movement along transform boundaries can result in earthquakes as the plates grind against each other.

Driving Forces of Plate Tectonics

The movement of tectonic plates is driven by several forces:

1. Convection Currents: Heat from the Earth's interior drives convection currents in the asthenosphere. These currents push and pull the tectonic plates, causing them to move.

2. Ridge Push: At divergent boundaries, new crust is constantly being formed. As this crust cools and becomes denser, it sinks, creating a gravitational force that pushes the plates away from the ridge.

3. Slab Pull: At convergent boundaries, the subducting plate pulls the rest of the plate behind it due to its increased density.

Impact and Significance

The theory of plate tectonics has revolutionized the understanding of Earth's geological processes. It explains the distribution of earthquakes, volcanoes, mountain ranges, and the formation of various geological features. It also provides insights into the formation and breakup of supercontinents, the evolution of ocean basins, and the long-term geological history of the Earth. Furthermore, plate tectonics plays a crucial role in shaping the Earth's surface, influencing climate patterns, and affecting the distribution of resources such as minerals, oil, and gas.

In conclusion, the theory of plate tectonics is a comprehensive framework that

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According to the theory of plate tectonics the earth crust is made up of seven major and some minor plates.

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Earth's outer shell is divide into many several plates that glide over the mantle,the rocky inner layer above the core.The plates acts like a hard and rigid shell compared to earth's mantle

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The theory of plate tectonics is a theory which means that the crust of our earth (upper layer of the earth) is made up of seven major and several minor plates.

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Theory of plate tectonics lays down that the crust of the Earth has been formed out of seven major and some minor plates. The movement of plates beneath the surface of the Earth creates tension resulting into folding,
faulting
and volcanic activities.

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