EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pangaea was a “super-continent” that existed about 300 million years ago.
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Plate tectonics cause the earth’s surface to shift and change in various ways.
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Scientists discovered similar fossil types and rock types on different continents.
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Crustal movements create convergent, divergent, and transform boundaries.
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Detailed explanation-1: -Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.
Detailed explanation-2: -Tectonic Plates The system of ideas behind plate tectonics theory suggests that Earth’s outer shell (lithosphere) is divided into several plates that glide over the Earth’s rocky inner layer above the soft core (mantle). The plates act like a hard and rigid shell compared to Earth’s mantle.
Detailed explanation-3: -Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years (Fig. 7.18).
Detailed explanation-4: -Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.
Detailed explanation-5: -Theory of Plate Tectonics states that the earth’s outer crust i.e. lithosphere is divided into plates (seven major and seven minors) that move over the asthenosphere, the molten upper portion of the mantle. Plate Tectonics is responsible for various geomorphological processes such as Folding, faulting etc.