Plate tectonics is the theory that explains the structure, composition and internal workings of the earth on a worldwide scale, while continental drift refers to the theory that the continents all used to be connected in one megacontinent which scientists dub pangaea. Driving forces of plate motion edit file:global plate motion 2008-04-17jpg plate tectonics is basically a kinematic phenomenon scientists agree on the observation and deduction that the plates have moved with respect to one another but continue to debate as to how and when. The theory of continental drift was the first step toward plate tectonic theory, which became the foundation upon which modern geology is built this module describes how the work of alfred wegener, harry hess, and others led to our understanding of plate tectonics. Plate tectonics is the scientific theory that attempts to explain the movements of the earth's lithosphere that have formed the landscape features we see across the globe today by definition, the word plate in geologic terms means a large slab of solid rock tectonics is a part of the greek. Plate tectonics is a former featured articleplease see the links under article milestones below for its original nomination page (for older articles, check the nomination archive) and why it was removed: this article appeared on wikipedia's main page as today's featured article on august 12, 2004.
Plate tectonics on earth: theories and observations jun korenaga various geological indicators for the emergence of the physical theory of plate tectonics thus has important applications to planetary habitability and the origins of life in the universe (eg, korenaga 2012) however, if we do not have a theory to explain why plate. 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 earth's surface relative to each other, like slabs of ice on a lake. In geologic terms, a plate is a large, rigid slab of solid rock the word tectonics comes from the greek root to build putting these two words together, we get the term plate tectonics, which refers to how the earth's surface is built of plates the theory of plate tectonics states that the earth's outermost layer is fragmented into a dozen or more large and small plates that are moving. Chapter 1 from continental drift to plate tectonics naomi oreskes since the l6th century, cartographers have noticed the jigsaw-puzzle fit of the continental edges1 since the 19th century, geol- ogists have known that some fossil plants and animals are extraordinar.
History of plate tectonics plate tectonic theory had its beginnings in 1915 when alfred wegener proposed his theory of continental drift wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines (like south america and africa) look like they fit together like a puzzle. Plate tectonics provides another, more plausible explanation for this due to the constant movement and interaction of the tectonic plates with each other, various geological structures were formed. Different types of relative motion and different types of lithosphere @ plate boundaries create distinctive sets of geologic features (the point of your lab – more details in our wrap-up discussion on monday. Chapters 20 and 21: plate tectonics and mountain building early theories of orogenic belts and mountain building 1 an orogeny is a term used to define the process of mountain building 2 figure 217: orogenic belts are regions of intense folding and faulting accompanied by granitic intrusions and metamorphism which result from mountain building processes.
One of the most important contributions to the development of plate tectonic theory was alfred wegener's 1915 publication of 'the origin of continents and oceans' which outlined his theory of continental drift wegener supported his argument with five lines of evidence. Miles) depth the theory of plate tectonics proposes that the lithosphere is divided into a series of plates that fit together like the pieces of a jigsaw puzzle although plate tectonics is a relatively young idea in comparison with unifying theories from other sciences (eg, law of gravity, theory of evolution), some of the basic. Plate tectonics is the theory that explains the global distribution of geological phenomena principally it refers to the movement and interaction of the earth's lithosphere this includes the formation, movement, collision and destruction of plates and the resulting geological events such as seismicity, volcanism, continental drift, and.
Seafloor spreading occurs at divergent plate boundaries as tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less densethe less-dense material rises, often forming a mountain or elevated area of the seafloor. Theory of continental drift - wegener’s theory that says all of today’s continents were once part on one supercontinent which broke apart and the continents then moved into their present positions. Plate tectonics is the unifying theory of the earth how did the theory develop what is the evidence based on in the early 1960s, the emergence of the theoryof plate • early studies of paleomagentism in rocks of different age seemed to indicate that magnetic north had steadily changed its position. This segment continues the discussion of terms and concepts related to plate tectonics theory, focusing on the nature of plate boundaries and their importance.
Attempt has been made to cover various points on different plate tectonics theories this unit in the form of pdf file includes engaging, colorful, informative, visually stimulating and eye-catching photos and diagrams as per the topic need which rarely fails to stimulate a lively class discussion. Identify and investigate the tectonic plate boundaries identify landforms and events that are created by tectonic plate movement research the theory of plate tectonics introduction ask students to complete the following discussion questions, either as a class or in small groups. Earth's history should include 'pre-plate tectonic' and 'plate tectonic' phases beginning less than a billion years ago, according to a team of geoscientists in the journal geology. Modern theories that continue building on the older mantle doming concepts and see plate movements as a secondary phenomena are beyond the scope of this page and are discussed elsewhere (for example on the plume tectonics page.
Continental drift was a theory that explained how continents shift position on earth's surface set forth in 1912 by alfred wegener, a geophysicist and meteorologist, continental drift also. You’ll notice the act did not include the theories of plate tectonics or gravity, but did expect teachers, after they have taught evolution, global warming, or human cloning, to stop, and have a little discussion of the pro’s and con’s, the advantages and disadvantages of these theories. As with a discussion of pangaea or plate tectonics in general, this article provides an opportunity to meet the earth and space science standard’s various concepts according to the national science education standards, “the idea of systems provides a framework in which students can investigate the four major interacting components of the.