Continental drift was a theory that explained how continents shift position on earths surface. Who proposed the theory and what evidence did he provide to prove his theory. Continental drift ppt plate tectonics mantle geology. Testing plate tectonics evidence for plate tectonics ocean drilling the data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted.
Continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Plate tectonics continental drift and mountain building adteam learning ebooks 01. Continental drift theory alfred wegener, 1922 plate tectonics breakup of pangea. The lithosphere is divided into moving segments that change. Most earthquakes and volcanoes occur along plate boundaries 3. Continental drift, seafloor spreading and plate tectonics. What mountain range demonstrates one of the most visible and spectacular consequences of plate tectonics. Plate tectonics pt plate tectonics is the movement of lithospheric plates relative to each other.
What are the theories of continental drift and plate tectonics. The difference between continental drift and plate tectonic theory plate tectonics theory the upper most mantle, along with overlying crust, behaves as a strong, rigid layer. Difference between continental drift and plate tectonics. Plate tectonics continental drift and mountain building. This approach is meant to highlight the historical development of the theory of plate tectonics. From continental drift to plate tectonics 7 and therefore they could not sink to become ocean basins. Look at the diagram under the continental continental information.
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. Dec 16, 2019 plate tectonics pt plate tectonics is the movement of lithospheric plates relative to each other. Plate tectonics discussion if you finish your discussion you may scroll down to the bottom of this page and watch the video natural disaster historys most. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The continental drift hypothesis was developed in the early part of the 20th century, mostly by alfred wegener.
Continental drift, plate tectonics, and seafloor spreading. The continental drift hypothesiscontinents have moved slowly to. Video showing how convection cells inside the earth move tectonic plates on the earths surface. Theory of continental drift proposed by alfred wegener in 1912, but not widely accepted until seafloor spreading was discovered in 1960. The plate tectonics theory is based on the continental drift theory in that it explains how the supercontinent drifted apart into several plates. Scribd is the worlds largest social reading and publishing site. Subduction zones are where mountainbuilding orogeny occurs 6. According to the theory of continental drift, the world was made up of a single continent through most of geologic time.
Theory of continental drift the continental drift hypothesis was developed in the early part of the 20th century, mostly by alfred wegener. Continental drift is a theory first presented by abraham ortelius abraham ortels in 1596. The continental drift hypothesiscontinents have moved slowly to notetaking worksheet. 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. A theory proposed by alfred wegner that said all continents were once joined 300 million years ago in a single land mass called pangaea. Pdf continental drift and the theory of plate tectonics.
New oceanic crust is formed through magma rising through the gap and cooling. That continent eventually separated and drifted apart, forming into the seven continents we have today. Continental drift and plate tectonics university of iceland. Plate tectonics is a relatively new scientific concept, introduced some 30 years ago, but it has revolutionized our understanding of the dynamic. Pdf alfred wegenerfrom continental drift to plate tectonics. Continental drift and plate tectonics worksheet crossword. Plate tectonics, seafloor spreading, and continental drift 7 in the 1950s, interest was revived by ex ploration of the ocean floor and the develop ment of paleomagnetic studies.
Third, and most fundamental, physicists discovered radiogenic heat, which contradicted the basic assumption of contraction theory that the earth was steadily cooling. The difference between continental drift and plate tectonic theory. Set forth in 1912 by alfred wegener, a geophysicist and meteorologist. Mar 12, 2020 continental drift, largescale horizontal movement of continents relative to one another and to the ocean basins during one or more episodes of geologic time. Convection current theory cct convection current theory forms the basis of sfst and pt. Continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Content outline continental drift section 1 plate tectonics underlined words and phrases are to be filled in by students on the a. File type pdf investigation 2 plate tectonics answer video 2 plate tectonic theories plate tectonic theory, continental drift, sea floor spreading, alfred wegener 1912, hess 1960, wadati benioff, structure and. Powered by create your own unique website with customizable templates.
Request pdf contractional theory, continental drift and plate tectonics earths tectonic system concerns the movement of the lithosphere, the relatively brittle outermost solid earth, which. According to the continental drift theory, the supercontinent pangaea began to break up about 225200 million years ago, eventually fragmenting into the continents as we know them today. The concept was independently and more fully developed by alfred wegener in 1912, but his theory was rejected by many for. If you continue browsing the site, you agree to the use of cookies on this website. The hypothesis asserts that the continents consist of.
Start studying continental drift, plate tectonics, and seafloor spreading. The speculation that continents might have drifted was first put forward by abraham ortelius in 1596. Look at the diagram under the continentalcontinental information. Pdf continental drift and plate tectonics part 1 jakie. New ocean crust is created along midocean ridges 4. The presentation about plate tectonics is divided into 3 separate discussions. Over time the continents moved to their present day locations. Continental drift is the movement of the earths continents relative to each other, thus appearing to drift across the ocean bed.
Jan 28, 2014 this feature is not available right now. Continental drift pangea final pangea plate tectonics. Students will examine one method for creating a twodimensional map of a spherical surface. Describe the type of plate boundary that forms mountains and islands. 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 first comprehensive theory of continental drift was suggested by the german meteorologist alfred wegener in 1912. The sections, called plates, move on a plasticlike layer of the mantle. The theory of continental drift wegener 1880 1930 alfred wegener first proposed the theory of continental drift. Continental drift, largescale horizontal movements of continents relative to one another and to the ocean basins during one or more episodes of geologic time. What happens when two continents meet headon, meet headon and neither is subducted.
As plates move, the new crust gradually moves away from the ridge. Fossils, geological units, mountain belts, coal and glacial deposits are found on both sides of an ocean. Continental drift is the theory that the earths continents have moved over geologic time relative to each other, thus appearing to have drifted across the ocean bed. Since the development of the theory, geologists have had to reexamine almost every aspect of. 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. A brief introduction to alfred wegeners theory of continental drift, which would lay the groundwork for the development of plate tectonic theory, which essentially explains the geology of the. Create your own kahoot from the information you have learned about plate tectonics and the continental drift theory.
Jun 20, 20 continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Earths crust and upper mantle are broken into sections. One piece of evidence wegener provided was paleoclimatic indicators that linked south america and africa plate tectonics. Alfred wegenerfrom continental drift to plate tectonics article pdf available in resonance 106. Students will create a model of the earth that they can hold and examine. He noted that glacial, tropical rain forests, and desert deposits were aligned when the continents were placed together plate tectonics. He also proposed a tectonic cycle the wilson cycle. The continental drift theory is the theory that once.
Apr 03, 2017 continental drift theory and plate tectonic 1. Students will examine plate boundaries, continents, and oceans on a globe. This concept was an important precursor to the development of the theory of plate tectonics, which incorporates it. Wegeners continental drift meets wilsons plate tectonics. 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 and seafloor spreading he the of. Continental drift and plate tectonics kaiserscience.
Wegener said that continents move around on earths surface and that they were once joined together as a single supercontinent. Plate tectonics, seafloor spreading, and continental. Students will defend their position on continental drift. In 1967, mckenzie and parker suggested the theory of plate tectonics. The theory has caused a revolution in the way we think about the earth. Continental drift and the theory of plate tectonics. Continental drift, sea floor spreading and plate tectonics. The theory of plate tectonics combine which two other theories.
It explains that the continents drifted apart because of the constant interaction between the earths tectonic plates and the heat of the earths core. Scribble notes are found in plate tectonics cut, color and organize. Plate tectonics theory the upper most mantle, along with overlying crust, behaves as a strong, rigid layer. According to the theory of plate tectonics, the earths lithosphere is broken into distinct plates which are. Wegener thought whole sections of the crust moved plate tectonics some people did not understand and thought the continents floated around in the oceans continental drift he died before people accepted his ideas. Small pieces of crust terranes are important in building up. See more ideas about earth science, plate tectonics and 6th grade science. The development of the theory is an excellent example of the cumulative nature of science and the scientifc.
The concept was independently developed by german geologist alfred wegener in 1912. 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 lead to the concept of plate tectonics. Hess 1960, 1962 revived holmess 1931 model of mantle convection. The difference between continental drift and plate. 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. Seafloor spreading occurs at divergent plate boundaries which subsequently create midocean ridges. Continental drift and plate tectonics key concepts initial observations that support continental drift. Continental drift the emergence and evolution of plate. Contractional theory, continental drift and plate tectonics.
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