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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 7 large plates and the movements of ...

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.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 ...

www.britannica.com/science/plate-tectonics

Apr 18, 2017 ... The concept of plate tectonics was formulated in the 1960s. According to the theory, Earth has a rigid outer layer, known as the lithosphere, ...

www.thoughtco.com/what-are-plate-tectonics-1435304

Mar 3, 2017 ... Plate tectonics is the scientific theory that attempts to explain the movements of the Earth's lithosphere that have formed the landscape features ...

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.visionlearning.com/en/library/Earth-Science/6/The-Origins-of-Plate-Tectonic-Theory/65

Learn how Alfred Wegener developed the theory of continental drift. Includes a discussion Wegener's work and modern advancements that have led to our ...

pubs.usgs.gov/gip/volc/tectonics.html

Jan 31, 1997 ... According to the now generally accepted "plate-tectonics" theory, scientists believe that the Earth's surface is broken into a number of shifting ...