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The theory of plate tectonics holds that the Earth's crust is composed of mobile plates, which have moved throughout Earth's history. This movement is caused by thermal convection currents produced by the Earth's mantle.

en.wikipedia.org/wiki/Plate_tectonics

Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the ...

csmres.jmu.edu/geollab/vageol/vahist/plates.html

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 ...

www.livescience.com/37706-what-is-plate-tectonics.html

Mar 21, 2016 ... Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle.

www.britannica.com/science/plate-tectonics

plate tectonics: theory dealing with the dynamics of Earth 's outer shell, the lithosphere, that revolutionized Earth sciences by providing a uniform context for  ...

www.ck12.org/earth-science/Theory-of-Plate-Tectonics/lesson/Theory-of-Plate-Tectonics-MS-ES

Jan 4, 2013 ... What would Wegener think? Like any great theory, plate tectonics makes a tremendous amount of sense. The whole story fits together so ...

thebritishgeographer.weebly.com/plate-tectonic-theory.html

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 ...

www.ucmp.berkeley.edu/geology/techist.html

Plate Tectonics: The Rocky History of an Idea ... Searching for evidence to further develop his theory of continental drift, Wegener came across a paleontological ...

scecinfo.usc.edu/education/k12/learn/plate2.htm

Aug 13, 1998 ... History of plate tectonics. Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of "continental drift.

www.merriam-webster.com/dictionary/plate%20tectonics

Define plate tectonics: geology : a scientific theory that the Earth's surface is made of very large sections that move very slowly; also : the…