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Plate tectonics Essays

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    Plate Tectonics Essay

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    PLATES TECTONICS Plate tectonics is the scientific theory that attempts to explain the motion of the Earth’s lithosphere that have formed the landscape the landscape features we see cross the globe. The theory of the plates tectonics state that the lithosphere of the earth is build up from single plates that are broken down into dozen massive and tiny particles of solid rock. These pieces of plates move near each other on the peak of the earth more fluid lower mantle to produce various type of plates

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    The World Beneath Our Feet Beneath our feet, a dozen plates are moving, creating more and more damage to human life. Millions of years ago our continents were compiled into one big block called Pangea. Plate tectonics is a theory that answers most of our questions about the earth’s surface. For example it tells us where and why most volcanoes occur, how mountains are formed and so many more questions. Plate tectonics affects our planets in many ways. They are the cause of most natural disaster such

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    The theory of plate tectonics was formulated in the 1960’s, to provide a realistic and complete idea of the processes that produce the Earth’s surface. These plates make up the Earth’s strong outer layer, the lithosphere. “This layer is about 100km thick, which includes the crust and the uppermost part of the mantle.” (Rafferty, 2010) Before the late 1960’s, geologists held the perspective that all the continents and ocean basins were in fixed positions. However this view was quickly dismissed, as

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    Plate Tectonics Movement

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    The Movement of Plate Tectonics Many scientists have done research on all continents being combined into one. This super continent is known as Pangea. Pangea existed 175 million years ago. But as time went on the continents slowly drifted apart. Underneath the earth are plate tectonics, and when the earth drifts apart the plate tectonics move and cause many things to happen. Many of our landforms were created because of this. Three examples are volcanos, earthquakes, and mountains. To begin, volcanos

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    Essay On Plate Tectonics

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    Plate tectonics, the cause of many, many natural disasters and landforms. The shifting of tectonic plates can cause earthquakes, mountains, volcanoes, mid-oceanic ridges, and oceanic trenches, depending on the direction the plates move. Though it seems they have such a large effect on Earth itself, the most affected thing being Earth’s organisms. These organisms have evolved to be able to live in these conditions, be it on top of mountains or deep below the surface of the ocean. These creatures

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    2018 Plate Tectonics definition of plate tectonics Plate tectonics is the study of the structure of the earths crust & mantle with reference to the theory that the earths lithosphere is divided into large rigid blocks that are floating on semi fluid rock and are thus able to interact with each other at their boundaries and to the associated theories of continental drift and sea floor spreading. There are a few handfuls of major plates and dozens of minor plates. Seven of the major plates are named

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    Birth of Plate Tectonics Plate tectonics is a scientific theory, coined in the 1950s, to explain the large-scale motion of Earth’s lithosphere (the outermost shell of planet Earth). This theory is based on the idea that Earth’s lithosphere is divided into several “plates” that move across the Earth’s surface, relative to each other, gliding over the mantle. The theory of plate tectonics was developed between the 1950s through the 1970s. It is basically the modern version of the theory of continental

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    variety of igneous metamorphic and sedimentary rocks. The tectonic plates are always colliding or pulling apart, creating mountains. Earthquakes and volcanoes occur at the edge of these tectonic plates because of the impact of the plate movements are greatest there. What would be interesting is what if plate tectonics never existed? What would be the social, economic, climatic impact of living without plate tectonics? Without tectonic forces that push and pull apart our lives would be different

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    Throughout geologic history, tectonic plate boundaries have diverged, converged and transformed the Earth, causing the surface of the Earth to be in a constant state of change. Plate tectonics, at present, is observed only on the Earth and “refers to a particular mode of convection in a planetary mantle, which is made of silicate rocks” (Korenaga 2012, p. 87). The lithosphere of the Earth is divided into plates which move at different velocities over the mantle, with much of the Earth’s seismic and

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    The Plate Tectonic Theory

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    broke the surface into plates that float on a sea of magma below. These plates are constantly moving, drifting apart creating divergence boundaries and crashing together creating convergence boundaries, colliding with the power to forge mountains, and splitting solid rock like it was paper. The discovery of these plates didn’t happen over night, the theory has been developed over centuries and finally we understand how mountains are built and canyons are formed. The plate tectonic theory hasn’t been

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    theories and ideas presented thus, not generally accepted. In the 1960s, plate tectonics emerged that explained Earth’s features such as continents, oceans, volcanoes, earthquakes, valleys and mountains. This theory became widely accepted by virtually all Earth scientists. A plate is a solid rock that is large and rigid while the Greek word tectonics means ‘to build’. Plate tectonics is the study of how the surface of the Earth is formed, how the separate pieces of it moves and the effects of this

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    St Helens Research Paper

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    Activity of the Cascadia Fault is what had triggered the activity of St Helens in 1980 and in 2004. The Cascadia fault is a convergent plate boundary. The fault is a described as long and slopping, it starts in Northern Vancouver Island and expands down to Northern California. The Cascadia fault line separates the Juan de Fuca plate and the North American plate. Tectonic processes active in the Cascadia subduction zone region include accretion, subduction, deep earthquakes, and active volcanism of the

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    Samoa's Tsunami

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    natural disasters affected Samoa. Earthquakes Earths crust is a hard-outer cover that is surrounding around the whole earth; it is made up of many, many pieces that are called Tectonic plates. These tectonic plates are constantly moving however they move quite slowly, the move up to 5 centre meters per year. However, these plates brush against one another without causing any damage. Sometimes

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    Question #1a: Provide a thorough description of the contents of ocean water.            The contents of ocean water is that it is very salty. The salt in the ocean water comes from many different types of rocks on land. How the salt from rocks is that when rain falls down on land the rain will slowly erode the rock. How that is happening is the acid in the rain erodes the rock but it is not dangerous acid to us humans. When the rock gets eroded then it turns into ions which is an atom or molecule

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    subduction zone created by the intersection of these two plates sits roughly 100 km south of Tokyo virtually bisecting Sagami Bay. Movements associated with these two tectonic plates triggered the 8.2 magnitude approximate Genroku Earthquake of 1703 and the 7.9 magnitude approximate Great Kantō Earthquake of 1923. Recent scholarship suggests that Tokyo is vulnerable to earthquakes triggered by the movement of yet another tectonic plate or “dislodged plate fragment” located directly beneath the Kantō Plain

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    The other part of the Earth consists of rigid plates which is called the lithosphere plates. They are moving relatively to each other. The moving of lithosphere plates is called plate tectonics. The idea of plate tectonics begin in 1600. Little significance was given to this notion till 1915 when Alfred Wegener, Germany meteorologist and geophysicist wrote a book entitled The Origins of Continents and Oceans. He had read about the similarities in the American and European fossils and become interested

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    ground shake. When two plates are rubbing against each other, they stick a little. Most earthquakes occur along the edge of the oceanic and continental plates. Due to stress they shift and cause the earthquake. that zone is more subject to seismic disasters. Tectonic, volcanic, collapse and explosion, are the four different types of earthquakes. A tectonic earthquake is one that occurs when the earth 's crust breaks due to geological forces on rocks and adjoining plates that cause physical and

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    in ash, mud, toxic gases and lava. Mt Saint Helens is one of many active volcanos in the Cascade Mountain Range that runs along the Pacific Coast of the United States of America, a part of the Pacific Ring of Fire, named due to the many active tectonic plates in the region. The blast devastated an area of 20 square km. Within 10km of the summit, were there had previously been dense forest, no trees remained, beyond this area all trees were blown down. A further 600km2 was covered in ash and debris

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    The primary reason/ cause for this tsunami were the two earthquakes and their associated movement of tectonic plates. To explain further; under our earth we have firstly the lithosphere at the surface and the mantle followed by the inner and outer core. (13) Refer to figure 1 below. The lithosphere consists of the crust and the upper mantle and it is divided into 7 major sections called tectonic

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    seismologists have been doing research on the Cascadia subduction zone, which is a convergent plate boundary that runs for 700 miles off the Pacific Northwest, and starts from northern California and goes all the way to Vancouver Island. A subduction zone is the place where one tectonic plate slides underneath another. However, in this case, the North American tectonic plate is stuck and is wedged against the oceanic plate called Juan de Fuca. With all the pressure building up, the edge of North America is

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