What are characteristics of continental drift theory. They rise up from the radioactive core, carrying heat to the thin. Continental drift and plate tectonics chapter 8 pages 215228 exam score the pink marks on your scantron responses show what you did answer, not an indication of correct or incorrect. It explains that the continents drifted apart because of the constant interaction between the earths tectonic plates and the heat of. Ever since the first global maps were drawn following the great voyages of discovery of the 15th and 16th centuries, it has been realised that the coastline geography of the continents on either side of the atlantic ocean form a pattern that can be fitted back together. Plate tectonics and continental drift infographic live. 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. Difference between continental drift and plate tectonics. Refer to the map 2 tectonic map to determine the relative motion of the land on either side of the san andreas. Continental drift the emergence and evolution of plate. The difference between continental drift and plate. Continental drift is a theory first presented by abraham ortelius abraham ortels in 1596. According to the theory of plate tectonics, the earths lithosphere is broken into distinct plates which are.
Does the entire lithospheric plate transmit stress in the same way. Choose from 500 different sets of plate tectonics continental drift questions flashcards on quizlet. Alfred wegener some people thought the earth was shrinking and cracking wegener thought whole sections of the crust moved. Continental drift theorycontinental drift theory first proposed by alfred wegener in 1912. Continental drift and plate tectonics columbia university. Continental drift and plate tectonics why mountains are high where the plates meet terrane accretion terranes in western north america plate boundaries and earthquakes hot spots hot spots. They based their idea of continental drift on several lines of evidence. Alfred wegener, in the first three decades of this century, and dutoit in the 1920s and 1930s gathered evidence that the continents had moved. Shelf fit of southern continents mesosaurus occurrences other fossil locations. Continental drift to plate tectonics welcome to ms. Continental drift and plate tectonics explores the inner earth and its surface. Continental drift and plate tectonics welcome to ms. Plate tectonics should be required reading for all people because we live on a very dynamic planet.
Alfred wegenerfrom continental drift to plate tectonics article pdf available in resonance 106. Continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. How we know plate tectonics happens most earthquakes and volcanoes occur. The 1906 san francisco earthquake and the mount st. Continental drift theory alfred wegener proposed that. The term continental drift was coined to support the idea that the continents were floating around on a sea of magma, drifting about and crashing into each other. 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. The lithosphere is found to have an elastic portion which is roughly the upper. According to theory of plate tectonics, earth is an active planet its surface is composed of many individual plates that move and interact, constantly changing and reshaping earths outer layer. When two oceanic plates collide, the younger of the two plates, because it is less dense, will ride over the edge of the older plate seafloor spreading.
Wegeners theory was rejected by scientists because he could not explain what force pushes or pulls continents. Subduction zones are where mountainbuilding orogeny occurs 6. The first comprehensive theory of continental drift was suggested by the german meteorologist alfred wegener in 1912. Continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The theory of continental drift suggests that the continents drift across the ocean and are not stationary on earths surface. Professor vorwald plate tectonics and continental drift lab page 2 of 15 part b. 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. Oct 31, 2008 continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. We now know that, directly or indirectly, plate tectonics influences nearly all geologic processes, past and present. The plate tectonics theory refers to the largescale movement of the seven major plates along with several other smaller plates that form the earths lithosphere, for the last hundreds of millions of years. Activity 1 resource l1 example of resource for activity 2 l2 continental drift worksheet. Alfred wegner proposed that all of the continents on earth were once fitted together into a single super continent that he named, urkontinent. Plate tectonics theory the upper most mantle, along with overlying crust, behaves as a strong, rigid layer. Geologic events, such as earthquakes and mountain building, result from movement of the plates.
Jun 20, 20 continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Review what youve learned about plate tectonics and continental drift. What did tuzo wilson prove that wegner could not about how plates moved. 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. Tuzo wilson came up with a theory called plate tectonics. 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.
Most earthquakes and volcanoes occur along plate boundaries 3. In 1967, mckenzie and parker suggested the theory of plate tectonics. Continental drift, sea floor spreading and plate tectonics. Briefly describe wegners 4 proofs for continental drift. Rating is available when the video has been rented. 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. Pdf a historical account of how continental drift and. Helens volcanic eruption are explained and illustrated through. 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. The lithosphere is divided into moving segments that change. New ocean crust is created along midocean ridges 4. Describe the type of plate boundary that forms mountains and islands. The theory of continental drift was one of the earliest ideas explaining how the continents move. Start studying continental drift, seafloor spreading, plate tectonics.
Plate tectonicscontinental drift and mountain building find, read and cite all the research you. Wegener 18801930 continental drift was wegeners theory that all continents had once been joined together in a single landmass and have drifted apart since. Continental drift and plate tectonics theory for kids youtube. Continental drift and plate tectonics free download as powerpoint presentation. Continental drift and plate tectonics kaiserscience. Oct 09, 2012 continental drift and plate tectonics. Look at the diagram under the continental continental information. At subduction zones subduction zones are where mountainbuilding orogeny. Wegeners continental drift meets wilsons plate tectonics. What happens when two continents meet headon, meet headon and neither is subducted. Since the development of the theory, geologists have had to reexamine almost every aspect of. By 1968, the concepts of continental drift and seafloor spreading were united to form the theory of plate tectonics. Continental drift, seafloor spreading, plate tectonics.
Testing for plate can measure mgvements as little as i cm per year. Morgan reeves 5th period convergent boundaries subduction zones. 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. Continental drift plate tectonics linkedin slideshare. Earth is thought to be the force behind plate tectonics. The theory has caused a revolution in the way we think about the earth. The thick arrows show the actual directions of plate movement. Animation of sea floor spreading worldwide earthquake patterns help us know where the edges of plates are located the earths plates wegener 18801930 continental drift was wegeners theory that all continents had once been joined together in a single landmass and have drifted apart since. Colour online number of publications in english per year between 1950 and 2017 on a palaeogeography, b continental drift and c plate tectonics. Tuzo wilson offered a fundamental reinterpretation of wegeners continental drift theory and became the first person to use the term plates to describe the division and pattern of relative movement between different regions of the earths surface i. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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. Please notify me after class if you have correct answers marked wrong. It explains that the continents drifted apart because of the constant interaction between the earths tectonic plates and the heat of the earths core.
Alfred wegener some people thought the earth was shrinking and cracking wegener thought whole sections of the crust moved plate tectonics some people did not understand and thought the continents floated. Apr 23, 2020 continental drift plate jigsaw student activity file in this activity students create their own version of our tectonic plates as a jigsaw, using bread and paints. The concept was independently developed by german geologist alfred wegener in 1912. Plate tectonics continental drift and mountain building pdf. The difference between continental drift and plate tectonic. Continental drift to plate tectonics flashcards quizlet. If you continue browsing the site, you agree to the use of cookies on this website. Continental drift is an archaic and misleading term that is no longer in use. The theory is based on the concept proposed by the continental drift model and was accepted by the geological community in the early 1960s. Pdf on jan 1, 2012, karoly nemeth and others published w. According to the theory of continental drift, the world was made up of a single continent through most of geologic time. Continental drift theory alfred wegener proposed that parts of earths crust slowly drift atop a. Continental drift and plate tectonics university of iceland.
Learn plate tectonics continental drift questions with free interactive flashcards. You should also be able to identify several pieces of evidence that support the theory of plate tectonics and continental drift. He noted that glacial, tropical rain forests, and desert deposits were aligned when the continents were placed together plate tectonics. Continental drift, paleomagnetism, and plate tectonics. And it really does miss something important, its really not the continents that are drifting, the seafloor is. He also proposed a tectonic cycle the wilson cycle. That continent eventually separated and drifted apart, forming into the seven continents we have today. Concerning the theory of plate tectonics, i am more knowledgeable than the average person on the street, but i am greatly humbled by the vast expanse of what plate tectonics involves and the depth of knowledge that geologist have attained. Stresses relax in the lower portion of the plate where creep processes dominate, but still behaves coherently with the plate. Dec 21, 2016 continental drift is an archaic and misleading term that is no longer in use. Who proposed the theory and what evidence did he provide to prove his theory. One piece of evidence wegener provided was paleoclimatic indicators that linked south america and africa plate tectonics. The plate tectonics theory is based on the continental drift theory in that it explains how the supercontinent drifted apart into several plates.
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