The diagram to the left shows a map fit of the continental masses about 150200 years agothis is a piece of data used to confirm that the continents drifted to where they are today the concept of continental drift initiated the rock plate concept. Contractional theory, continental drift and plate tectonics. Mar 17, 2016 in the 20th century, researchers realized that the earths crust is not one piece, but is made up of many huge tectonic plates upon which the continents ride. Continental drift video clip notice how fossils lined up across continents.
Continental drift theory alfred wegener, 1922 plate tectonics breakup of pangea. Chapter 1 from continental drift to plate tectonics naomi oreskes since the l6th century, cartographers have noticed the jigsawpuzzle fit of the continental edges. Continental drift plate tectonics underlined words and phrases are to be filled in by students on the notetaking worksheet. Due to the fact that continental drift is a theory, there is evidence and other sets of statements to back it up. Learn continental drift theory plate tectonics with free interactive flashcards. Alfred wegener some people thought the earth was shrinking and cracking wegener thought whole sections of the crust moved. From wikipedia, the free encyclopedia plate tectonics from greek, tekton. Continental drift and plate tectonics free download as powerpoint presentation.
Plate tectonics continental drift and mountain building theories that explain how the present continents were formed. Continental drift is a theory first presented by abraham ortelius abraham ortels in 1596. Continental drift theorycontinental drift theory first proposed by alfred wegener in 1912. If you take a look at a globe, you can see that if we were to squish the land all together, most of the continents seem to fit together like a puzzle. The plates are made up of continental and oceanic lithospheres with. Review what youve learned about plate tectonics and continental drift. Aug 28, 2012 1 are plate tectonics and the continental drift theory the same. This was the time when reptiles and winged insects first appeared. Continental drift, in the context of the modern theory of plate tectonics, is explained by the movement of lithospheric plates over the asthenosphere the molten, ductile, upper portion of the earths mantle.
Pdf on jan 1, 2012, karoly nemeth and others published w. Continental drift the first step in the scientific method begins with making observations 102 years ago, in 1912, alfred wegener made observations about the similarities of different continents based on his observations, and using the scientific method, he formulated a hypothesis. Continental drift continents were once joined, moved through ocean floor not with it, do not use layers of earth. Plate tectonics has proven to be so useful that it can predict geologic events and explain almost all aspects of what we see on the earth. Plate tectonicscontinental drift and mountain building find, read and cite all the research you.
In the mid 1800s, antonio sniderpelligrini acknowledged that the same plant fossils were in the coal beds of europe and north america at places where the continents seemed to have fit together geographically plate tectonics. Pdf the concept of interplay between mantle convection and tectonics goes back to about a century ago, with the proposal that. Scribd is the worlds largest social reading and publishing site. Continental drift and plate tectonics visavis earths expansion. Continental drift and plate tectonics plate tectonics. Continental drift and plate tectonics essay 2643 words cram.
Plate tectonics continental drift from circa 1911 alfred wegener, after being influenced by a scientific paper he had come across that listed fossils of identical plants and animals found on opposite sides of the atlantic, began proposing a then most controversial theory which held that the continents of the earth had once been joined together but had drifted apart through a process that he. Explain the theory of continental drift, and how it. The earths crust consists of a number of mobile plates, masses of crust that move independently of adjacent plates. Continental drift, seafloor spreading, plate tectonics. Start studying continental drift, seafloor spreading, plate tectonics. Styles of thought on the continental drift debate mpg. I make a distinction between plate tectonics and continental drift because i think continental drift specifically refers to wegeners hypothesis which didnt have a mechanism and therefore you cant really call it a valid theory because it wasnt accepted by other scientists and it did have some things wrong with it. It is important to advise that this does not imply to reject the role of evidence in the acceptance of the plate tectonic theory, but to focus on its social and cultural. Plate tectonics and continental drift tectonics is the study of the orig in and arran gement o f earths stru ctural fea tures w hich include not only folds and faults but also continents, mountains, and earthquake regions.
Difference between continental drift and plate tectonics. Continental drift vs plate tectonics difference theoryof plate. That continent eventually separated and drifted apart, forming into the seven continents we have today. Continental drift and plate tectonics science with mrs. Frisch and meschede and blakey answer all these questions and more through the presentation and explanation of the geodynamic processes upon which the theory of continental drift is based and which have led to the concept of plate tectonics. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass. Choose from 500 different sets of continental drift theory plate tectonics flashcards on quizlet. Therefore, based on the concepts of the continental drift and other developing ideas at the time, a general theory was developed, which is now known as the plate tectonics. According to the theory of continental drift, the world was made up of a single continent through most of geologic time.
Plate tectonics overview hartebeesthoek radio astronomy. Plate tectonics is the theory explaining the motion of the outer crust or the lithosphere of earth. The crust is broken up into giant tectonic plates that ride atop the magma, hot meltedrock material that makes up much of the interior of. Plate tectonics continental drift and mountain building. Continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Activity 1 resource l1 example of resource for activity 2 l2 continental drift worksheet. 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. Continental drift video clip notice how fossils lined up. Continental drift and plate tectonics missouri state university.
The continental drift hypothesiscontinents have moved slowly to their current locations 1. The plate tectonics theory is based on the continental drift theory in that it explains how. Our approach is to combine abductive reasoning in which we take. Most earthquakes and volcanoes occur along plate boundaries 3. Continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Continental drift and plate tectonics theory for kids youtube. Continental drift and plate tectonics f you look closely at a world map, you might notice something about the coastlines of south america and africa. They based their idea of continental drift on several lines of evidence. In 1967, mckenzie and parker suggested the theory of plate tectonics. In that case, the deeper processes set the context for environment, and environment is thus taken to mean regional aspects of the environment, such as average annual temperature and rainfall, seasonal regimes such as the monsoon, and perhaps average wind speed and. Plate tectonics explains structure and internal workings, plates move on the layers, continents separate eachother. All continents were once connected as one large landmass now called pangaea. If you continue browsing the site, you agree to the use of cookies on this website. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
A halfcentury has passed since the dawning of the plate tectonic. In 1912, a german scientist called alfred wegener proposed that south america and africa were once joined together and had subsequently moved apart. The structure of the earth, plate tectonics and landforms. The contribution of hess hess measured the oceans to the deepest points to date, 10.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. The concept of interplay between mantle convection and tectonics goes back to about a century ago, with. This plate motion causes them to collide, pull apart, or scrape against each other. Pdf fullplate modelling in prejurassic time researchgate. Since the development of the theory, geologists have had to reexamine almost every aspect of.
Plate tectonics and continental drift infographic live. Plate tectonics, involving a globally linked system of lateral motion of rigid surface. In this article, we take a closer look at two of the more popular theories continental drift and plate tectonics to learn how they differ from each other. The theory has caused a revolution in the way we think about the earth. 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.
Pdf a mantle convection perspective on global tectonics. Oct 09, 2012 continental drift and plate tectonics. Hypotheses like continental drift, plate tectonics or earths expansion should not be considered as viable in view of solid and rigid state of mantle. The first comprehensive theory of continental drift was suggested by the german meteorologist alfred wegener in 1912. The plate tectonics theory is based on the continental drift theory in that it explains how the supercontinent drifted apart into several plates. Convection current theory cct convection current theory forms the basis of sfst and pt. According to the plate tectonic model, the surface of the earth consists of a series of relatively thin, but rigid, plates which are in constant motion. New ocean crust is created along midocean ridges 4. Continental drift is the process of large mass of land and rocks unceasingly moving for a long period of time, which can be explained by what is called plate tectonics.
Plate tectonics pt plate tectonics is the movement of lithospheric plates relative to each other. Continental drift, sea floor spreading and plate tectonics. Continental drift the emergence and evolution of plate. Animation of sea floor spreading worldwide earthquake patterns help us know where the edges of plates are located the earths plates earthobservatory.
Explain the theory of continental drift, and how it was developed. Another thing do we need to write the paleomagnetism in the cont. The surface layer of each plate is composed of oceanic crust, continental crust or a combination of both. Most influential earth scientists were based in the northern hemisphere, whereas most of the conclusive data came from the southern hemisphere there were plausible alternative explanations to the distribution of fossils and glacial deposits the geophysisists could not think of a force strong. From these simple observations the theory of plate tectonics developed.
The oldest ages for the rift to drift transition are preserved in the north china. Alfred wegener, in the first three decades of this century, and dutoit in the 1920s and 1930s gathered evidence that the continents had moved. Plate tectonics the earths crust is divided into plates which are moved in various directions. In the 20th century, researchers realized that the earths crust is not one piece, but is made up of many huge tectonic plates upon which the continents ride. Each type of interaction causes a characteristic set of earth structures or tectonic features. Oct 31, 2008 continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
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