Sea floor spreading
Sea floor spreading 1 mapping the mid-ocean ridge• the mid-ocean ridge is the longest chain ofmountains in the world• in the 1950’s scientist mapped the mid-oceanridge using sonar•sonar. Sea-floor spreading from the oceanic ridges is essential for plate tectonics theory the continental drift is “powered” by plate subduction under the crust along convergent plate margins if. The sea floor is divided by a system of mountain ranges (mid-ocean ridges) each with a deep valley running down the center (mid-ocean rifts) on the bathymetric map to the right you can. Table of contents1 convectional current theory – tectonics11 mapping of the ocean floor12 distribution of earthquakes and volcanoes13 convectional current theory2 paleomagnetism21. Sea floor spreading states that new oceanic crust is being formed continuously at mid-oceanic ridges, while the older rocks move away from the ridge. Teachers guide: page 2 of 19 as the ocean floor spreads apart along mid-ocean ridges (called spreading centers), the molten material that comes up along this linear.
List the main features of the seafloor: mid-ocean ridges, deep sea trenches, and abyssal plains describe what seafloor magnetism tells scientists about the seafloor describe the process of. Key points seafloor spreading takes place at midocean ridges and produces basalt, the rock that makes up the oceanic crust the mid-atlantic ridge and east pacific rise are examples of. Introduction mid-ocean ridge - an undersea mountain chain where new ocean floor is produced magma erupts through the mid-ocean ridge as lava it cools and hardens on the ocean floor as rock. In this introductory excel tutorial (activity i) students use excel to explore the geodynamics model equation for ocean depth around a sea-floor spreading center for students with no prior. Definitions of seafloor spreading, synonyms, antonyms, derivatives of seafloor spreading, analogical dictionary of seafloor spreading (english.
Get information, facts, and pictures about seafloor spreading at encyclopediacom make research projects and school reports about seafloor spreading easy with credible articles from our. Define seafloor spreading: the divergence at mid-ocean ridges of the tectonic plates underlying the oceans that is due to upwelling from the earth's. Define sea-floor spreading sea-floor spreading synonyms, sea-floor spreading pronunciation, sea-floor spreading translation, english dictionary definition of sea-floor spreading n in the. Seafloor spreadingstudent handout why in the plate tectonic model, earth’s tectonic plates rift apart at oceanic spreading centers th.
(a) abstract the australian plate has undergone major changes in plate boundary geometry and relative plate velocities since the breakup of gondwanaland. Looking for seafloor spreading hypothesis find out information about seafloor spreading hypothesis theory of lithospheric evolution that holds that the ocean floors are spreading outward.
Sea floor spreading
Seafloor spreading: seafloor spreading, theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. Seafloor spreading: ii formally proposed by dietz (1961) and hess (1962): • convection cells: mantle upwells under mid-ocean ridge (mor) • lithosphere with new oceanic crust is formed at. 2a6 new discoveries leading to plate tectonics: evidence for seafloor spreading 2a4 new discoveries leading to plate tectonics: apparent polar-wander paths 7:48 2a6 new.
The best videos and questions to learn about seafloor spreading get smarter on socratic. Seafloor spreading adds material to oceanic plates, causing the oceanic plate to come into contact with other plates but not necessarily causing those affected plates to drift the image. Continental drift, sea floor spreading and plate tectonics pdf - download as pdf file (pdf), text file (txt) or view presentation slides online upsc. A dynamic principle of geology was explained with harry hess' discovery of sea floor spreading. A secondary school revision resource for ocr gcse 21st century science about the earth, space, plate tectonics and continental drift. Perhaps surprisingly, it was world war ii that gave scientists the tools to find the mechanism for continental drift that had eluded wegener and his colleagues scientists used maps and.
Definition of sea-floor spreading - the formation of fresh areas of oceanic crust which occurs through the upwelling of magma at mid-ocean ridges and its subsequent o. Teaching for science • learning for life tm | wwwdeepearthacademyorg activity of the month activity of the month – june, 2008 plate tectonics and contributions from. Purpose: students will make a paper model illustrating the concept of sea-floor spreading and the development of symmetrical magnetic stripes on either side of a mid- ocean spreading. Sea floor spreading definition, a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out see more.