Dec 17, 2019 plate tectonics it was from the continental drift theory, convection current theory and the theory of seafloor spreading, the theory of plate tectonics was formulated. Although plate tectonics is a relatively young idea in comparison with unifying theories from other sciences e. Midocean ridges are essentially submerged mountain chains that are characterised by a deep central rift valley. New crustal plate is formed at the midocean ridges and old crustal plate is destroyed at deep ocean trenches. Plate tectonics describes the distribution and motion of the plates. Development of plate tectonic theory timeline preceden. Dec 12, 20 a quick overview of plate tectonics, including a look at the different types of plate boundaries. Plate tectonics the earths crust is divided into plates which are moved in various directions. The cross section should really be curved to correspond. The theory encompasses the older concepts of continental drift, developed. Wegeners theory and sea floor maps were used to develop the theory of plate tectonics. Ppt the theory of plate tectonics powerpoint presentation.
The new model of horizontal movement of the continents was called plate tectonics. Continental drift, sea floor spreading and plate tectonics plate tectonics is a theory developed in the late 1960s, to explain how the outer layers of the earth move and deform. Plate tectonics is a related theory about how the continents drift. Plate tectonics is a scientific theory describing the largescale motion of seven large plates and. Developed from the 1950s through the 1970s, plate tectonics is the modern version of continental drift, a theory first proposed by scientist alfred wegener in 1912. Takehome messages earths geology is dominated by the processes of plate tectonics. From wikipedia, the free encyclopedia plate tectonics from greek, tekton builder or mason describes the large scale motions of earths lithosphere. The theory of plate tectonics explains how plates and their continents move. Plate tectonics is a theory explaining the structure of the earths crust and the interaction of plates that move slowly over underlying mantle.
Plate tectonic theory both hesss discovery and wegners continental drift theory combined into what scientists now call the plate tectonic theory. The presentation is formatted as a picture style audio book. Because of the strength and rigidity of oceanic plates, deformation is focused into narrow linear zones along plate margins. The actual developer of the free software is university of colorado, department of physics. Revival of the continental drift theory wegeners theory just would not go away, despite. Plate tectonics, or the movements of plates above the lithosphere the most upper layer of earths crust can cause divergent, convergent,and transform boundaries. This is when plates are moving away from each other.
Pdf plate tectonics, our major paradigm for how the earth works, was established in the 1960ies following decades of observational research that. Plate tectonics is the theory that earths outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. Plate tectonics is the grand, unifying theory of earth sciences, combining the concepts of continental drift and seafloor spreading into one holistic theory that explains many of the major structural features of the earths surface. Plate tectonics part ii paleogeography promotional a video presentation of paleogeography using a set of globe maps and basic anmination techniques highlighting audio content. Along spreading centers in the sea floor, melted rock rises through cracks, cools, and forms new crust that builds up midocean ridges. Pdf contractional theory, continental drift and plate tectonics. Ppt plate tectonics powerpoint presentation free to. Since the development of the theory, geologists have had to reexamine almost every aspect of. Plate tectonics is the theory that landmasses on tectonic plates are in slow constant movement due to convection currents in the mantle. This plate motion causes them to collide, pull apart, or scrape against each other. Along the way, i disclose details of what real science is all about, details all too often absent in textbooks and classroom discussions. Plate tectonics wikipedia, the free encyclopedia harvard university. Earth structure and plate tectonics crains petrophysical handbook. The theory was originally described by the term continental drift, but it is evident that.
Plate tectonics is crucial to our understanding about how all earth processes happen from the rock cycle to the building of mountains to volcanoes, to earthquakes, and more. L1 advanced readers plate motions point out that the arrows in figure 20 show the direction of plate motion. In this plate tectonic framework, large scale deformation is the local response of the lithosphere to induced stresses. This graphic organizer for plate tectonic theory is a great way for students to organize their notes. In essence, platetectonic theory is elegantly simple.
Exactly how this works is still a matter of debate. Plate tectonics is crucial to our understanding about how all earth processes happen from the rock cycle to the building of mountains to volcanoes, to earthquakes, and more a unifying theory is the main theory that explains how a whole group of natural phenomenon come about. Plate tectonics is the theory that the outer rigid layer of the earth the lithosphere is divided into a couple of dozen plates that move around across the earths surface relative to each. The drawing above is a cross section of the earth showing the components that lie within plate tectonic theory. Crust is continuously being regenerated and removed. The earths crust and part of the upper mantle are broken into sections, called plates which move on a plasticlike layer of the mantle. A middle school lesson on plate tectonics theory for grades 68. Apr 19, 2020 alfredwegener1920dieentstehungderkontinenten, pdf download lithosphere latest articles quantifying rates of rifting while drifting in the southern gulf of california. Tectonic plates are composed of oceanic lithosphere and. The third plate boundary type is a transform boundary.
Plate tectonics is a recognized modern geological theory addressing the motion of the lithosphere. Locations of earthquakes and volcanoes show the plate boundaries and ocean floor features. The platelike sections that move as distinct masses cause much of the earths seismic activity at the boundary of these plates. The theory of plate tectonics grew out of earlier hypotheses and observations collected during exploration of the rocks of the ocean floor. Plate tectonic theory arose out of the hypothesis of continental drift proposed by alfred. Plate tectonics the tectonic plates of the world were mapped in the second half of the 20th century.
Earths crust and upper mantle are divided into plates. The crust is made up of six major plates and a number of minor ones. Dec 09, 2019 some of the worksheets below are tectonic plates worksheets, predicting tectonic activity, definition of plate composition, plate movement, types of plate boundary, continentcontinent collision, handson activities, with colorful diagrams along with questions and answers at the end of each page. As ideas concerning plate tectonics have evolved since the 1970s, it has become apparent that while the theory can be applied rigorously to the oceans, the same cannot be said of the continents. Quantifying rates of rifting while drifting in the southern gulf of california. Tectonic theory definition of tectonic theory by the free. Iceland is one of the few places where this process can be seen on land. The lithosphere is divided into plates, some of which are very large and can be entire continents heat from the mantle is the source of energy driving plate tectonics. Free powerpoint presentations about plate tectonics for kids. Jul 31, 2016 a middle school lesson on plate tectonics theory for grades 68. In 1967, mckenzie and parker suggested the theory of plate tectonics. Plate tectonics definition of plate tectonics by merriam.
This is when two plates are moving toward each other. Earths surface layer, 50 to 100 km 30 to 60 miles thick, is rigid and is composed of a set of large and small plates. I judged that it would be good if the published text will be. Plate techtonics definition of plate techtonics by the. Our antivirus check shows that this download is malware free. Plate tectonics simple english wikipedia, the free. The structure of the earth, plate tectonics and landforms. Tectonic plates reading material grades 68 printable. Plate techtonics definition of plate techtonics by the free. Perfect for whole group lessons, interactive science notebooks, or student note taking guides.
This is when tectonic plates are sliding past each other. A quick overview of plate tectonics, including a look at the different types of plate boundaries. When the concept of seafloor spreading came along, scientists recognized that it was the mechanism to explain how continents could move around earths surface. Plate tectonics is a principal process that largely forms the face of the earth. Continental drift, sea floor spreading and plate tectonics. A unifying theory is the main theory that explains how a whole group of natural phenomenon come about. Below this is a zone that slows earthquake waves because the mantle here is plastic rather than brittle. Lithosphere is divided into plates that slide around on top of the slowly moving mesosphere tectonic plates it occurred after the breakup of pangaea, and since then the continents have drifted apart the pictures show continental drift theory from 225 million years to present. Then have them reread to identify observations that the theory of plate tectonics explains. The theory of plate tectonics geology lumen learning. Central to the theory of plate tectonics is the concept of. According to the theory of plate tectonics, the earths lithosphere is broken into distinct. Principally it refers to the movement and interaction of the earths lithosphere. Each type of interaction causes a characteristic set of earth structures or tectonic features.
Plate tectonics is the theory that the outer rigid layer of the earth the lithosphere is divided into a couple of dozen plates that move around across the earths surface relative to each other, like slabs of ice on a lake. It divides over ninety percent of the earth surface into fifteen primary pieces of lithosphere known as tectonic plates. Together, these plates constitute the lithosphere, from the greek lithos, meaning rock. Frank taylor first proposed this idea in 1910, alexander du toit later in 1937, harry hess explored the geomorphology of the seafloor by ship in 1960s.
The role of the southern baja california microplate and its eastern boundary zone. Plate tectonics is the theory that explains the global distribution of geological phenomena. I like using these for formative assessments to check for understanding along the way. Tectonic theory synonyms, tectonic theory pronunciation, tectonic theory translation, english dictionary definition of tectonic theory. Some of the worksheets below are tectonic plates worksheets, predicting tectonic activity, definition of plate composition, plate movement, types of plate boundary, continentcontinent collision, handson activities, with colorful diagrams along with questions and answers at the end of each page. The continents are carried on some of these plates. Plate movement is driven by convection in earths mantle. Plate tectonics is the theory that explains how large pieces of the earths outermost layer, called tectonic plates, move and change shape. This version is revised from a previously uploaded version, edited to include basic animations.
The first type of plate boundary is called a convergent boundary. This includes the formation, movement, collision and destruction of plates and the resulting geological events such as seismicity, volcanism, continental drift, and. Alfredwegener1920dieentstehungderkontinenten, pdf download. You will get to learn about these ideas and related concepts, such as. The theory of plate tectonics chapter 14 lesson 3 p510519 a free powerpoint ppt presentation displayed as a flash slide show on id. Since the theory of plate tectonics was first introduced, how far has the tectonic plate were standing on moved. Free powerpoint presentations about plate tectonics for. According to the theory of plate tectonics, the earths lithosphere is broken into distinct plates which are. Theory of continental drift proposed by alfred wegener in 1912, but not widely accepted until seafloor spreading was discovered in 1960. The theory of plate tectonics the theory of plate tectonics chapter 14 lesson 3 p510519 powerpoint ppt presentation free to view plate tectonics plate tectonics court monroe chapter 17, pages 443 463 alfred wegener, father of continental drift wegener thought that the continents were once connected. Below is a sample breakdown of the plate tectonics chapter into a 5day school week. Like the scientists before us, we will now merge the ideas of continental drift and seafloor spreading into the theory of plate tectonics. The theory of plate tectonics is a unifying theory for geology. Plate tectonics have students team read pages 158 and 159 to.
Continental drift and plate tectonics university of iceland. Plate techtonics synonyms, plate techtonics pronunciation, plate techtonics translation, english dictionary definition of plate techtonics. Chapter 1 plate tectonics power point linkedin slideshare. Plate tectonics it was from the continental drift theory, convection current theory and the theory of seafloor spreading, the theory of plate tectonics was formulated. Alfred wegener and continental drift it was not until 1912 that the idea of moving continents was seriously considered as a fullblown scientific theory called continental drift introduced in two articles published by a 32yearold german meteorologist named alfred lothar wegener alfred lothar wegener 18801930 earned a. The earth is composed of layers of different composition and physical properties, principally the solid central core, the fluid peripheral core, the viscous mantle, and the solid. Central to the theory of plate tectonics is the concept of internal rigidity of tectonic plates together with eulers theo rem, which allows us to model the relative motion of plates. Tectonic theory definition of tectonic theory by the.
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