Plate tectonics is the theory that the earth’s crust is divided up into a dozen plates. Continental drift is how geologists explain that the continents have moved over time. Sea-floor spreading is when two tectonic plates move away from each other and magma come up to form new ocean floors. Plate tectonics, continental drift, and sea-floor spreading have some similarities and differences. They can be contrasted based on boundaries. They could be compared based on what caused the process to happen
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Sea-Floor Spreading, plate tectonics,and continental drift. Are all parts of the earth,that make the Earth still survive today.Seafloor Spreading is a geological process in which tectonic plates, large slabs of Earth’s lithosphere split apart from each other. Seafloor spreading helps us in many ways. One way is that, it makes up the the oceanic crust. Another way is that it makes large mountain ranges, that rise from the ocean floor.Plate tectonics is the theory that Earth’s outer shell is divided
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The Plate Tectonic Theory After many years of research, scientists are now able to get a much greater understanding of how Earth’s geological features are constantly altered through the process of plate tectonics. The theory of plate tectonics explains the reason behind the features of Earth’s surface, which is now fragmented into dozens of lands constantly changed through tectonic behaviors. This was argued for decades up until Wegener’s developed four major plate-tectonics theories. The geological
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higher velocities than S waves. Three general classes of earthquakes are now recognized as tectonic, volcanic, and artificially produced. The tectonic variety is by far the most destructive. The most common cause of tectonic quakes are stresses by movements of the dozen of major and minor plates that make up the earth's crust . Most tectonic quakes occur at the boundaries of these plates, in zones where one plate slides past another Subduction-zone quakes account for nearly half of the world's destructive
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Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building")[1] is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s. The lithosphere, which is the
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With reference to particular examples, suggest why the impacts of tectonic hazards vary from place to place Tectonic hazards are natural events occurring due to movements or deformations of the earth’s crust with the potential to cause damage to lives and properties. E.g. earthquake and volcanic activities. The impact caused by tectonic hazards on lives and properties are mainly determined by physical factors, vulnerability factors and affected region’s capacity to cope. These factors are parts
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Volcanoes and Plate Tectonics Time Frame: Two to three periods I. Objectives At the end of the lesson, the students should be able to: 1. discuss the tectonic activities that happen at plate boundaries; 2. discuss some consequences of having the Philippines in a tectonically active zone; 3. explain why the Philippines experiences many earthquakes; and 4. explain why the Philippines has many volcanoes. II. Subject Matter A. Topic: Earthquakes, Volcanoes and Plate Tectonics B: References:
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will not be discussing minerals, it will introduce the history of rocks and how they are affected by plate tectonics. The focus of this report is on two of the three types of rocks, igneous and metamorphic rocks. Plate tectonics plays a key role in the life of these types of rocks. So let’s get started by first explaining igneous rocks. Next metamorphic rocks will be explained. Lastly, plate tectonics and the affect this theory has on both types of rock. Igneous rocks are rocks that form from magma
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Structure and composition of the Earth The overall composition of the Earth is very similar to that of meteorites, and because of this, it is thought that the Earth originally formed from Planetesimals composed largely of metallic iron and silicates. What makes Earth unique? Soon after the Earth formed, unique processes occurred - division into metallic core, silicate mantle and crust - which, along with surface water, made it different from the other planets in our Solar System. The formation
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|earth has tectonic plates that can move, this movement is called Tectonic activity. When the plates shift, the movement can cause | | |volcanic eruptions and earthquakes. The earth has received two kinds of crust due to tectonic activities, the thick granitic | | |continental crust, and the thin basaltic oceanic crust. The theory that the earth is not one solid shell of rock sitting on a magma | | |core is called the lithosphere theory. The shifting plate theory seems to
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