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.
Plate tectonics is a scientific theory describing the large-scale motion of 7 large
plates and the ...
Plate tectonics definition, a theory of global tectonics in which the lithosphere is
divided into a number of crustal plates, each of which moves on the plastic ...
Define plate tectonics: geology : a scientific theory that the Earth's surface is
made of very large sections that move very slowly; also : the…
Mar 21, 2016 ... Plate tectonics is the theory that Earth's outer shell is divided into several plates
that glide over the mantle.
The theory of plate tectonics states that the Earth's surface, the upper mantle and
crust, was once made up of enormous rock plates that broke into smaller pieces ...
www.thefreedictionary.com/plate tectonic theory
plate tectonic theory. Also found in: Thesaurus, Wikipedia. Related to plate
tectonic theory: Seafloor Spreading Theory. ThesaurusAntonymsRelated ...
Jan 4, 2013 ... Like any great theory, plate tectonics makes a tremendous amount of sense. ... In
general, what does the theory of plate tectonics explain?
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 ...
Double-click it to look it up in Merriam-Webster's Student Dictionary. ... The theory
, or idea, of plate tectonics says that Earth's outer layer is made up of large, ...