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Plate Boundaries and Types Video Lecture | Geography Class 11 - Humanities/Arts
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FAQs on Plate Boundaries and Types Video Lecture - Geography Class 11 - Humanities/Arts
| 1. What are plate boundaries and why are they significant in understanding Earth's dynamics? |  |
Ans. Plate boundaries are the areas where tectonic plates meet and interact with each other. These boundaries are significant because they are responsible for the creation of various geological features such as mountains, volcanoes, and earthquakes. Understanding plate boundaries helps scientists comprehend the processes that shape Earth's surface and contribute to the movement of continents.
| 2. What are the three main types of plate boundaries? | |
Ans. The three main types of plate boundaries are divergent boundaries, convergent boundaries, and transform boundaries. Divergent boundaries occur when plates move away from each other, creating new crust. Convergent boundaries are formed when plates collide, leading to the destruction or deformation of crust. Transform boundaries occur when plates slide past each other horizontally.
| 3. How do divergent plate boundaries contribute to the formation of new crust? | |
Ans. Divergent plate boundaries lead to the formation of new crust through a process called seafloor spreading. As two plates move away from each other, magma rises from the mantle and fills the gap, creating new oceanic crust. This process occurs predominantly along mid-ocean ridges, where new crust continuously forms and pushes the existing crust aside.
| 4. What are the different types of convergent plate boundaries and how do they affect Earth's geology? | |
Ans. The different types of convergent plate boundaries are oceanic-oceanic, oceanic-continental, and continental-continental boundaries. In an oceanic-oceanic convergence, one oceanic plate subducts beneath another, forming deep ocean trenches and volcanic arcs. Oceanic-continental convergence results in the subduction of oceanic crust beneath continental crust, giving rise to volcanic mountain chains and earthquakes. Continental-continental convergence leads to the collision of two continental plates, forming massive mountain ranges.
| 5. How do transform plate boundaries contribute to the occurrence of earthquakes? | |
Ans. Transform plate boundaries are characterized by the horizontal sliding of plates past each other. As the plates grind against each other, they often become locked due to friction. When the stress along the boundary becomes too great, the plates suddenly slip, releasing a tremendous amount of energy and causing an earthquake. Famous examples of transform plate boundaries include the San Andreas Fault in California and the North Anatolian Fault in Turkey.
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Nov 22, 2024 Last updated |
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